As filed with the Securities and Exchange Commission on December 4, 2015

Registration No. 333-207669

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

 

AMENDMENT NO. 1
TO
Form S-4
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

 

DENTSPLY International Inc.

(Exact name of registrant as specified in its charter)

 

Delaware		3843		39-1434669
(State or other jurisdiction of incorporation or organization)		(Primary Standard Industrial Classification Code Number)		(I.R.S. Employer Identification No.)

 

Susquehanna Commerce Center
221 W. Philadelphia Street
York, Pennsylvania 17401
(717) 845-7511

(Address, including zip code, and telephone number,
including area code, of registrant’s principal executive offices)

 

Deborah M. Rasin, Esq.
Vice President, Secretary and
General Counsel
DENTSPLY International Inc.
Susquehanna Commerce Center
221 W. Philadelphia Street
York, Pennsylvania 17401
(717) 845-7511

(Name, address, including zip code, and telephone number,
including area code, of agent for service)

 

Copies to:

Michael P. Rogan, Esq. Pankaj K. Sinha, Esq. Skadden, Arps, Slate, Meagher & Flom LLP 1440 New York Avenue, N.W. Washington, DC 20005 Tel: (202) 371-7000		Jonathan Friedman, Esq. Secretary and General Counsel Sirona Dental Systems, Inc. 30-30 47th Avenue, Suite 500 Long Island City, New York 11101 Tel: (718) 482-2011		Mark D. Gerstein, Esq. Bradley C. Faris, Esq. Latham & Watkins LLP 330 North Wabash Avenue Suite 2800 Chicago, Illinois 60611 Tel: (312) 876-7700

 

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this Registration Statement becomes effective and upon completion of the merger described in the enclosed joint proxy statement/prospectus.

If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. o

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. o

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer x		Accelerated filer o
Non-accelerated filer o (Do not check if a smaller reporting company)		Smaller reporting company o

If applicable, place an X in the box to designate the appropriate rule provision relied upon in conducting this transaction:

o Exchange Act Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

o Exchange Act Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act, or until the registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

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Information contained herein is subject to completion or amendment. A registration statement relating to these securities has been filed with the Securities and Exchange Commission. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This joint proxy statement/prospectus shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of such securities, in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to appropriate registration or qualification under the securities laws of such jurisdiction.

PRELIMINARY — SUBJECT TO COMPLETION — DATED DECEMBER 4, 2015

MERGER PROPOSED — YOUR VOTE IS VERY IMPORTANT

Dear Stockholders:

The boards of directors of DENTSPLY International Inc. (“DENTSPLY”) and Sirona Dental Systems, Inc. (“Sirona”) have unanimously approved and DENTSPLY and Sirona have entered into an Agreement and Plan of Merger, dated as of September 15, 2015 (the “merger agreement”), with respect to a “merger of equals” strategic business combination (the “merger” between DENTSPLY and Sirona). Pursuant to the terms of the merger agreement, Dawkins Merger Sub Inc., a wholly owned subsidiary of DENTSPLY and a party to the merger agreement (“Merger Sub”), will merge with and into Sirona, with Sirona surviving as a wholly owned subsidiary of DENTSPLY. Upon completion of the merger, DENTSPLY and Sirona, and their respective subsidiaries, will operate as a combined company under the name DENTSPLY SIRONA Inc.

Upon completion of the merger, each issued and outstanding share of Sirona common stock will be converted into the right to receive 1.8142 shares of DENTSPLY common stock (the “exchange ratio”). This exchange ratio will not be adjusted for changes in the market price of either DENTSPLY common stock or Sirona common stock between the date of signing of the merger agreement and completion of the merger.

Based on the estimated number of shares of DENTSPLY common stock and Sirona common stock that will be outstanding immediately prior to the closing of the merger, upon such closing, DENTSPLY stockholders immediately prior to the effective time of the merger will own approximately 58% of the combined company and Sirona stockholders immediately prior to the effective time of the merger will own approximately 42% of the combined company. The combined company will be listed on the NASDAQ Global Select Market (“NASDAQ”) under DENTSPLY’s current symbol, “XRAY.”

DENTSPLY and Sirona will each hold a special meeting of its respective stockholders to consider the proposed merger. At the special meeting of DENTSPLY stockholders, DENTSPLY stockholders will be asked to vote on the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, the proposal to adopt DENTSPLY’s second amended and restated certificate of incorporation (the “amended and restated certificate of incorporation”), the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger, the proposal to approve the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan (the “Plan”) to be effective as of the consummation of the merger and the proposal to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation. At the special meeting of Sirona stockholders, Sirona stockholders will be asked to vote on the proposal to adopt the merger agreement, the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement.

We cannot complete the merger unless the stockholders of each company approve the respective proposals of each company as described herein. Your vote is very important, regardless of the number of shares you own. Whether or not you expect to attend either special meeting in person, please submit a proxy to vote your shares as promptly as possible so that your shares may be represented and voted at the DENTSPLY or Sirona special meeting, as applicable.

The DENTSPLY board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of DENTSPLY and its stockholders. The DENTSPLY board of directors unanimously recommends that DENTSPLY stockholders vote “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger, “FOR” the proposal to approve the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan and “FOR” the proposal to approve any motion to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation.

The Sirona board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of Sirona and its stockholders. The Sirona board of directors unanimously recommends that Sirona stockholders vote “FOR” the proposal to adopt the merger agreement, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and “FOR” the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement.

The obligations of DENTSPLY and Sirona to complete the merger are subject to the satisfaction or waiver of several conditions set forth in the merger agreement. The accompanying joint proxy statement/prospectus contains detailed information about DENTSPLY, Sirona, the special meetings, the merger agreement and the merger. DENTSPLY and Sirona encourage you to read the joint proxy statement/prospectus carefully and in its entirety, including the section entitled “Risk Factors” beginning on page 21.

We look forward to the successful combination of DENTSPLY and Sirona.

Sincerely,		Sincerely,
Bret W. Wise Chairman and Chief Executive Officer DENTSPLY International Inc.		Jeffrey T. Slovin President and Chief Executive Officer Sirona Dental Systems, Inc.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved the merger and other transactions described in the joint proxy statement/prospectus, nor have they approved or disapproved of the securities to be issued under this joint proxy statement/prospectus or determined if this joint proxy statement/prospectus is accurate or complete. Any representation to the contrary is a criminal offense.

This joint proxy statement/prospectus is dated,          2015 and is first being mailed to DENTSPLY and Sirona stockholders on or about,          2015.

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DENTSPLY International Inc.
Susquehanna Commerce Center
221 W. Philadelphia Street
York, Pennsylvania 17401
(717) 845-7511

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
To Be Held On          , 2016

To the Stockholders of DENTSPLY International Inc.:

We are pleased to invite you to attend the special meeting of stockholders of DENTSPLY International Inc. (“DENTSPLY”), a Delaware corporation, which will be held at 221 W. Philadelphia St., York, Pennsylvania 17401, on           , 2016, at      , local time, for the following purposes:

DENTSPLY will transact no other business at the special meeting except such business as may properly be brought before the special meeting or any adjournments or postponements thereof. Please refer to the joint proxy statement/prospectus of which this notice forms a part for further information with respect to the business to be transacted at the DENTSPLY special meeting.

Completion of the merger is conditioned on, among other things, approval of the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and the adoption of DENTSPLY’s amended and restated certificate of incorporation by DENTSPLY stockholders.

The DENTSPLY board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of DENTSPLY and its stockholders. The DENTSPLY board of directors unanimously recommends that DENTSPLY stockholders vote “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements

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between DENTSPLY and its named executive officers relating to the merger, “FOR” the proposal to approve the Plan and “FOR” the proposal to approve any motion to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation.

The DENTSPLY board of directors has fixed the close of business on December 2, 2015 as the record date for determination of DENTSPLY stockholders entitled to receive notice of, and to vote at, the DENTSPLY special meeting or any adjournments or postponements thereof. DENTSPLY issued and outstanding capital stock consists solely of outstanding shares of DENTSPLY common stock. Accordingly, only holders of record of DENTSPLY common stock at the close of business on the record date are entitled to receive notice of, and to vote at, the DENTSPLY special meeting or at any adjournments or postponements thereof. The issuance of shares of DENTSPLY common stock requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. Adoption of DENTSPLY’s amended and restated certificate of incorporation requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock entitled to vote on the proposal. Approval, on a non-binding advisory basis, of specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal, although such vote will not be binding on DENTSPLY or its board of directors or any of its committees. Approval of the Plan requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. Adjournment of the DENTSPLY special meeting requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. A list of the names of DENTSPLY stockholders of record will be available for ten days prior to the DENTSPLY special meeting for any purpose germane to the special meeting between the hours of 8:30 a.m. and 4:30 p.m., local time, at the office of DENTSPLY’s Secretary, Susquehanna Commerce Center, 221 W. Philadelphia Street, York Pennsylvania 17401. The DENTSPLY stockholder list will also be available at the DENTSPLY special meeting for examination by any stockholder present at such meeting.

Your vote is very important. Whether or not you expect to attend the DENTSPLY special meeting in person, we urge you to submit a proxy to vote your shares as promptly as possible by either (1) logging onto www.proxyvote.com and following the instructions on your proxy card; (2) dialing 1-800-690-6903 and listening for further directions; or (3) signing and returning the enclosed proxy card in the postage-paid envelope provided, so that your shares may be represented and voted at the DENTSPLY special meeting. If your shares are held in the name of a bank, broker or other nominee, including an employee benefit plan trustee, please follow the instructions on the voting instruction card furnished by the record holder, as appropriate.

The enclosed joint proxy statement/prospectus provides a detailed description of the merger and the merger agreement as well as a description of the proposed issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, a description of DENTSPLY’s proposed amended and restated certificate of incorporation, description of specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger and a description of the proposed DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan. We urge you to read this joint proxy statement/prospectus, including any documents incorporated by reference, and the Annexes carefully and in their entirety. If you have any questions concerning the merger or this joint proxy statement/prospectus, would like additional copies or need help voting your shares of DENTSPLY common stock, please contact DENTSPLY’s proxy solicitor:

Innisfree M&A Incorporated
501 Madison Avenue, 20^th Floor
New York, New York 10022
Stockholders May Call Toll-Free: 877-825-8964
Banks and Brokers May Call Collect: 212-750-5833

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By Order of the Board of Directors of
DENTSPLY International Inc.,

Deborah M. Rasin
Vice President, Secretary and General Counsel

York, Pennsylvania
           , 2015

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Sirona Dental Systems, Inc.
30-30 47^th Avenue, Suite 500
Long Island City, New York 11101
(718) 937-5765

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
To Be Held On           , 2016

To the Stockholders of Sirona Dental Systems, Inc.:

We are pleased to invite you to attend the special meeting of stockholders of Sirona Dental Systems, Inc. (“Sirona”), a Delaware corporation, which will be held at          on           , 2016 at         , local time, for the following purposes:

Sirona will transact no other business at the special meeting except such business as may properly be brought before the special meeting or any adjournments or postponements thereof. Please refer to the joint proxy statement/prospectus of which this notice forms a part for further information with respect to the business to be transacted at the Sirona special meeting.

The Sirona board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of Sirona and its stockholders. The Sirona board of directors unanimously recommends that Sirona stockholders vote “FOR” the proposal to adopt the merger agreement, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and “FOR” the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement.

The Sirona board of directors has fixed the close of business on December 2, 2015 as the record date for determination of Sirona stockholders entitled to receive notice of, and to vote at, the Sirona special meeting or any adjournments or postponements thereof. Sirona issued and outstanding capital stock consists solely of outstanding shares of Sirona common stock. Accordingly, only holders of record of Sirona common stock at the close of business on the record date are entitled to receive notice of, and to vote at, the Sirona special meeting or at any adjournments or postponements thereof. Adoption of the merger agreement requires the affirmative vote of holders of a majority of the outstanding shares of Sirona common stock entitled to vote on the proposal. Approval, on a non-binding advisory basis, of specific compensatory arrangements between Sirona and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal, although such vote will not be binding on Sirona

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or its board of directors or any of its committees. Approval of the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement requires the affirmative vote of holders of a majority of the outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal. A list of the names of Sirona stockholders of record will be available for ten days prior to the Sirona special meeting for any purpose germane to the special meeting between the hours of 9:00 a.m. and 5:00 p.m., local time, at Sirona’s headquarters, 30-30 47^th Avenue, Suite 500, Long Island City, New York 11101. The Sirona stockholder list will also be available at the Sirona special meeting for examination by any stockholder present at such meeting.

Your vote is very important. Whether or not you expect to attend the Sirona special meeting in person, we urge you to submit a proxy to vote your shares as promptly as possible by either: (1) logging onto http://www.proxyvote.com and following the instructions on your proxy card; (2) dialing 877-456-7915 and listening for further directions; or (3) signing and returning the enclosed proxy card in the postage-paid envelope provided, so that your shares may be represented and voted at the Sirona special meeting. If your shares are held in a Sirona plan or in the name of a broker, bank or other nominee, please follow the instructions on the voting instruction card furnished by the record holder, as appropriate.

The enclosed joint proxy statement/prospectus provides a detailed description of the merger and the merger agreement. We urge you to read this joint proxy statement/prospectus, including any documents incorporated by reference, and the Annexes carefully and in their entirety. If you have any questions concerning the merger or this joint proxy statement/prospectus, would like additional copies or need help voting your shares of Sirona common stock, please contact Sirona’s proxy solicitor:

Georgeson Inc.
480 Washington Boulevard, 26^th Floor
Jersey City, NJ 07310
888-607-9107 (toll free)
sirona@georgeson.com (email)

By Order of the Board of Directors of
Sirona Dental Systems, Inc.,

Jonathan Friedman
Secretary and General Counsel

Long Island City, New York
           , 2015

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ADDITIONAL INFORMATION

This joint proxy statement/prospectus incorporates important business and financial information about DENTSPLY and Sirona from other documents that are not included in or delivered with this joint proxy statement/prospectus. This information is available to you without charge upon your request. You can obtain the documents incorporated by reference into this joint proxy statement/prospectus free of charge by requesting them in writing or by telephone from the appropriate company’s proxy solicitor at the following addresses and telephone numbers:

Innisfree M&A Incorporated 501 Madison Avenue, 20th Floor New York, New York 10022 Stockholders May Call Toll-Free: 877-825-8964 Banks and Brokers May Call Collect: 212-750-5833		Georgeson Inc. 480 Washington Boulevard, 26th Floor Jersey City, NJ 07310 Stockholders May Call Toll-Free: 888-607-9107 sirona@georgeson.com (email)

You may also obtain any of the documents incorporated by reference into this joint proxy statement/prospectus without charge through the U.S. Securities and Exchange Commission (the “SEC”) website at www.sec.gov. In addition, you may obtain copies of documents filed by DENTSPLY with the SEC by accessing DENTSPLY’s website at www.dentsply.com under the tab “Investor Relations” and then under the heading “Financial Info” and the tab “SEC Filings.” You may also obtain copies of documents filed by Sirona with the SEC by accessing Sirona’s website at www.sirona.com/en under the tab “Investors” and then under the heading “SEC Filings.”

We are not incorporating the contents of the websites of the SEC, DENTSPLY, Sirona or any other entity into this joint proxy statement/prospectus. We are providing the information about how you can obtain certain documents that are incorporated by reference into this joint proxy statement/prospectus at these websites only for your convenience.

If you would like to request any documents, please do so by           , 2016 in order to receive them before the special meetings.

For a more detailed description of the information incorporated by reference in this joint proxy statement/prospectus and how you may obtain it, see “Where You Can Find More Information” beginning on page 184.

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ABOUT THIS JOINT PROXY STATEMENT/PROSPECTUS

This joint proxy statement/prospectus, which forms part of a registration statement on Form S-4 filed with the SEC by DENTSPLY, constitutes a prospectus of DENTSPLY under Section 5 of the Securities Act of 1933, as amended (the “Securities Act”), with respect to the shares of DENTSPLY common stock to be issued to Sirona stockholders pursuant to the merger. This joint proxy statement/prospectus also constitutes a joint proxy statement for both DENTSPLY and Sirona under Section 14(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). It also constitutes a notice of meeting with respect to the special meeting of DENTSPLY stockholders and a notice of meeting with respect to the special meeting of Sirona stockholders.

You should rely only on the information contained in or incorporated by reference into this joint proxy statement/prospectus. No one has been authorized to provide you with information that is different from that contained in, or incorporated by reference into, this joint proxy statement/prospectus. This joint proxy statement/prospectus is dated            , 2016. You should not assume that the information contained in this joint proxy statement/prospectus is accurate as of any date other than that date. You should not assume that the information incorporated by reference into this joint proxy statement/prospectus is accurate as of any date other than the date of the incorporated document. Neither our mailing of this joint proxy statement/prospectus to DENTSPLY stockholders or Sirona stockholders nor the issuance by DENTSPLY of shares of common stock pursuant to the merger will create any implication to the contrary.

This joint proxy statement/prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, or the solicitation of a proxy in any jurisdiction to or from any person to whom it is unlawful to make any such offer or solicitation. Information contained in this joint proxy statement/prospectus regarding DENTSPLY has been provided by DENTSPLY and information contained in this joint proxy statement/prospectus regarding Sirona has been provided by Sirona.

All references in this joint proxy statement/prospectus to “DENTSPLY” refer to DENTSPLY International Inc., a Delaware corporation; all references in this joint proxy statement/prospectus to “Sirona” refer to Sirona Dental Systems, Inc., a Delaware corporation; and all references to “Merger Sub” refer to Dawkins Merger Sub Inc., a Delaware corporation and wholly owned subsidiary of DENTSPLY formed for the sole purpose of effecting the merger. Unless otherwise indicated or as the context requires, all references in this joint proxy statement/prospectus to “we,” “our” and “us” refer to DENTSPLY and Sirona collectively; and, unless otherwise indicated or as the context requires, all references to the “merger agreement” refer to the Agreement and Plan of Merger, dated as of September 15, 2015, by and among DENTSPLY, Sirona and Merger Sub, a copy of which is included as Annex A to this joint proxy statement/prospectus. DENTSPLY, following completion of the merger, is sometimes referred to in this joint proxy statement/prospectus as the “combined company” or “DENTSPLY SIRONA.”

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		Page
QUESTIONS AND ANSWERS			v
SUMMARY			1
The Companies			1
The Merger			2
Terms of the Merger			2
Merger Consideration			2
U.S. Federal Income Tax Consequences of the Merger			2
Recommendation of the Board of Directors of DENTSPLY			3
Recommendation of the Board of Directors of Sirona			3
Opinion of DENTSPLY’s Financial Advisor			3
Opinion of Sirona’s Financial Advisor			3
Interests of DENTSPLY Directors and Executive Officers in the Merger			4
Interests of Sirona Directors and Executive Officers in the Merger			5
Board of Directors and Management Following the Merger			5
DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan			6
Treatment of DENTSPLY Equity Incentive Awards			6
Treatment of Sirona Stock Options, RSUs and Performance Units			6
Regulatory Clearances Required for the Merger			7
Amended and Restated Certificate of Incorporation of DENTSPLY			7
Expected Timing of the Merger			7
Conditions to Completion of the Merger			8
No Solicitation of Alternative Proposals			9
Termination of the Merger Agreement			9
Termination Fees and Expenses			9
Accounting Treatment			10
No Appraisal Rights			10
Comparison of Stockholder Rights			10
Listing of Shares of DENTSPLY Common Stock; Delisting and Deregistration of Shares of Sirona Common Stock			10
The Meetings			10
The DENTSPLY Special Meeting			10
The Sirona Special Meeting			11
SUMMARY HISTORICAL CONSOLIDATED FINANCIAL DATA			13
Summary Historical Consolidated Financial Data of DENTSPLY			13
Summary Consolidated Historical Financial Data of Sirona			14
SELECTED UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION OF DENTSPLY AND SIRONA			16
UNAUDITED COMPARATIVE PER SHARE DATA			18
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS			19

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		Page
RISK FACTORS			21
Risk Factors Relating to the Merger			21
Risk Factors Relating to the Combined Company Following the Merger			25
Other Risk Factors of DENTSPLY and Sirona			26
THE COMPANIES			27
DENTSPLY International Inc.			27
Sirona Dental Systems, Inc.			27
Dawkins Merger Sub Inc.			27
THE DENTSPLY SPECIAL MEETING			28
Date, Time and Place			28
Purpose of the DENTSPLY Special Meeting			28
Recommendation of the Board of Directors of DENTSPLY			28
DENTSPLY Record Date; Stockholders Entitled to Vote			29
Voting by DENTSPLY’s Directors and Executive Officers			29
Quorum			29
Required Vote			29
Failure to Vote and Abstentions			30
Voting of Proxies by Holders of Record			31
Shares Held in “Street Name”			31
Revocation of Proxies			32
Tabulation of Votes			32
Solicitation of Proxies			32
Adjournments			33
THE SIRONA SPECIAL MEETING			34
Date, Time and Place			34
Purpose of the Sirona Special Meeting			34
Recommendation of the Board of Directors of Sirona			34
Sirona Record Date; Stockholders Entitled to Vote			34
Voting by Sirona’s Directors and Executive Officers			34
Quorum			35
Required Vote			35
Failure to Vote, Broker Non-Votes and Abstentions			35
Voting at the Special Meeting			36
Voting in Person			36
Voting by Proxy			36
How Proxies are Counted			36
Revocation of Proxies			37
Tabulation of Votes			37
Solicitation of Proxies			37
Adjournments			38

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		Page
THE MERGER			39
Effects of the Merger			39
Background of the Merger			39
DENTSPLY’s Reasons for the Merger; Recommendation of the DENTSPLY Board of Directors			49
Opinion of DENTSPLY’s Financial Advisor			52
Sirona’s Reasons for the Merger; Recommendation of the Sirona Board of Directors			60
Opinion of Sirona’s Financial Advisor			63
Unaudited Financial Forecasts			72
Amended and Restated Certificate of Incorporation of DENTSPLY			76
Interests of DENTSPLY Directors and Executive Officers in the Merger			76
DENTSPLY Stockholder Advisory Vote On Merger-Related Compensation For DENTSPLY’s Named Executive Officers Proposal			80
Golden Parachute Compensation – DENTSPLY			80
DENTSPLY Merger-Related Compensation Proposal			81
DENTSPLY Proposal — Approval of the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan			82
Interests of Sirona Directors and Executive Officers in the Merger			91
Sirona Stockholder Advisory Vote On Merger-Related Compensation For Sirona’s Named Executive Officers Proposal			95
Golden Parachute Compensation – Sirona			95
Employment Agreements			98
Sirona Merger-Related Compensation Proposal			100
Board of Directors and Management Following the Merger			100
Treatment of DENTSPLY Equity Incentive Awards			101
Treatment of Sirona Stock Options, RSUs and Performance Units			101
Regulatory Clearances Required for the Merger			102
Exchange of Shares in the Merger			103
Dividend Policy			103
Listing of DENTSPLY Common Stock			104
De-Listing and Deregistration of Sirona Stock			104
No Appraisal Rights			104
Litigation Related to the Merger			104
THE MERGER AGREEMENT			105
Terms of the Merger; Merger Consideration			105
Completion of the Merger			106
Exchange of Shares in the Merger			106
Representations and Warranties			107
Conduct of Business Pending the Effective Time			108
No Solicitation of Alternative Proposals			111
Changes in Board Recommendations			112
Efforts to Obtain Required Stockholder Votes			113
Efforts to Complete the Merger			114

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		Page
Governance Matters After the Merger			114
Employee Benefits Matters			117
Treatment of Sirona Stock Options, RSUs and Performance Units			117
Other Covenants and Agreements			118
Conditions to Completion of the Merger			118
Termination of the Merger Agreement			120
Expenses and Termination Fees; Liability for Breach			121
Amendments, Extensions and Waivers			123
Parties in Interest			123
Specific Performance			123
U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER			125
ACCOUNTING TREATMENT			127
UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION			128
UNAUDITED PRO FORMA COMBINED BALANCE SHEET			130
UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS			131
NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS			133
COMPARATIVE STOCK PRICE DATA AND DIVIDENDS			140
Stock Prices			140
Dividends			140
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS OF SIRONA			141
DESCRIPTION OF DENTSPLY SIRONA CAPITAL STOCK			144
Authorized Capital Stock			144
Description of DENTSPLY SIRONA Common Stock			144
Blank Check Preferred Stock			145
Anti-takeover Provisions			145
COMPARISON OF RIGHTS OF SIRONA STOCKHOLDERS AND DENTSPLY SIRONA STOCKHOLDERS			147
NO APPRAISAL RIGHTS			153
LEGAL MATTERS			153
EXPERTS			153
STOCKHOLDER PROPOSALS			153
EXECUTIVE AND DIRECTOR COMPENSATION			155
OTHER MATTERS			184
WHERE YOU CAN FIND MORE INFORMATION			184
Annex A — Agreement and Plan of Merger, dated September 15, 2015			A-1
Annex B — Opinion of Moelis & Company LLC			B-1
Annex C — Opinion of Jefferies LLC			C-1
Annex D — Form of Amended and Restated Certificate of Incorporation of DENTSPLY SIRONA Inc.			D-1
Annex E — Form of DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan			E-1

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QUESTIONS AND ANSWERS

The following are some questions that you, as a stockholder of DENTSPLY or a stockholder of Sirona, may have regarding the merger and the other matters being considered at the special meetings and the answers to those questions. DENTSPLY and Sirona urge you to carefully read the remainder of this joint proxy statement/prospectus because the information in this section does not provide all the information that might be important to you with respect to the merger and the other matters being considered at the special meetings. Additional important information is also contained in the Annexes to, and the documents incorporated by reference into, this joint proxy statement/prospectus.

In order to complete the merger, among other things:

DENTSPLY and Sirona will hold separate special meetings of their respective stockholders to obtain these approvals. This joint proxy statement/prospectus, including its Annexes, contains and incorporates by reference important information about DENTSPLY, Sirona, the special meetings, the merger agreement and the merger. You should read all the available information carefully and in its entirety.

Sirona Stockholders:  If the merger is completed, holders of Sirona common stock will receive 1.8142 shares of DENTSPLY common stock for each share of Sirona common stock they hold at the effective time of the merger. Sirona stockholders will not receive any fractional shares of DENTSPLY common stock in the merger. Instead, Sirona stockholders will receive cash in lieu of any fractional shares of DENTSPLY common stock that the Sirona stockholders would otherwise have been entitled to receive.

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Sirona Stockholders:  The special meeting of Sirona stockholders will be held at     , on           , 2016, at            , local time.

If you wish to attend your respective company’s special meeting, you must bring photo identification. If you hold your shares through a bank, broker or other nominee, including an employee benefit plan trustee, you must also bring proof of ownership such as the voting instruction form from your broker or other nominee or an account statement.

Sirona Stockholders:  The record date for the Sirona special meeting is December 2, 2015. Only holders of record of outstanding shares of Sirona common stock as of the close of business on the record date are entitled to notice of, and to vote at, the Sirona special meeting or any adjournments or postponements of the Sirona special meeting.

Approval by DENTSPLY stockholders of the share issuance proposal and the proposal concerning adoption of DENTSPLY’s amended and restated certificate of incorporation is required to complete the merger.

Sirona stockholders are being asked to vote on the following proposals:

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Approval by Sirona stockholders of the proposal to adopt the merger agreement is required to complete the merger.

Adoption of DENTSPLY’s amended and restated certificate of incorporation requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock entitled to vote on the proposal. Failures to vote, abstentions and broker non-votes will have the effect of a vote against the proposal.

Approval, on a non-binding advisory basis, of specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. Abstentions will have the effect of a vote against the proposal. Failures to vote and broker non-votes will have no effect on the proposal, assuming a quorum is present. Because the vote regarding these specific merger-related compensatory arrangements between DENTSPLY and its named executive officers is advisory only, it will not be binding on DENTSPLY or, following completion of the merger, the combined company. Accordingly, if the merger is completed, the DENTSPLY named executive officers will be eligible to receive the various merger-related compensation that may become payable in connection with the completion of the merger, subject only to the conditions applicable thereto, regardless of the outcome of the non-binding, advisory vote of the DENTSPLY stockholders.

Approval of the Plan requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. Abstentions will have the effect of a vote against the proposal. Failures to vote and broker non-votes will have no effect on the proposal, assuming a quorum is present. Approval of the Plan is not required to consummate the merger. However, the DENTSPLY board of directors has made the proposed implementation of the Plan contingent upon the consummation of the merger. If the merger is not consummated, then the Plan will not be implemented, even if approved by DENTSPLY’s stockholders.

Approval of the proposal to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. Abstentions will have the effect of a vote against the proposal. Failures to vote and broker non-votes will have no effect on the proposal, assuming a quorum is present.

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Approval, on a non-binding advisory basis, of specific compensatory arrangements between Sirona and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the issued and outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal. Abstentions will have the effect of a vote against the proposal. Failures to vote and broker non-votes will have no effect on the proposal, assuming a quorum is present. Because the vote regarding these specific merger-related compensatory arrangements between Sirona and its named executive officers is advisory only, it will not be binding on Sirona or, following completion of the merger, the combined company. Accordingly, if the merger is approved and completed, the Sirona named executive officers will be eligible to receive the various merger-related compensation that may become payable in connection with the completion of the merger, subject only to the conditions applicable thereto, regardless of the outcome of the non-binding, advisory vote of the Sirona stockholders.

Approval of the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement requires the affirmative vote of holders of a majority of the issued and outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal. Abstentions will have the effect of a vote against the proposal. Failures to vote and broker non-votes will have no effect on the proposal, assuming a quorum is present.

Abstentions will be included in the calculation of the number of shares of DENTSPLY common stock represented at the special meeting for purposes of determining whether a quorum has been achieved. However, broker non-votes, which are described below, will not be included in the calculation of the number of shares of DENTSPLY common stock represented at the special meeting for purposes of determining whether a quorum has been achieved.

Sirona Stockholders:  Stockholders who hold shares representing at least a majority of the issued and outstanding shares of common stock entitled to vote at the Sirona special meeting must be present in person or represented by proxy to constitute a quorum for the transaction of business at the Sirona special meeting. The holders of a majority of the outstanding shares of common stock entitled to vote and present in person or represented by proxy at any meeting of Sirona stockholders, whether or not a quorum is present, may adjourn such meeting to another time and place. At any such adjourned meeting at which a quorum shall be present, any business may be transacted that might have been transacted at the original meeting. No notice of an adjourned meeting need be given unless the adjournment is for more than 30 days or, if after the adjournment, a new record date is fixed for the adjourned meeting, in which case a notice of the adjourned meeting shall be given to each stockholder of record entitled to vote at the meeting. The chairman of the Sirona special meeting shall also have the authority to recess and/or adjourn the Sirona special meeting for any reason.

Abstentions will be included in the calculation of the number of shares of Sirona common stock represented at the special meeting for purposes of determining whether a quorum has been achieved. However, broker non-votes, which are described below, will not be included in the calculation of the

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number of shares of Sirona common stock represented at the special meeting for purposes of determining whether a quorum has been achieved.

If you are a stockholder of record, you may also cast your vote in person at your respective company’s special meeting.

If your shares are held in “street name,” through a broker, trustee or other nominee, that institution will send you separate instructions describing the procedure for voting your shares. “Street name” stockholders who wish to vote at the meeting will need to obtain a “legal proxy” form from their broker, trustee or other nominee.

Sirona Stockholders:  Holders of Sirona common stock are entitled to one vote for each share owned as of the close of business on the Sirona record date. As of the close of business on the Sirona record date, there were 55,937,320 shares of Sirona common stock outstanding and entitled to vote at the Sirona special meeting.

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In connection with the DENTSPLY special meeting:

In connection with the Sirona special meeting:

You should therefore provide your broker, bank, employee benefit plan trustee or other nominee with instructions as to how to vote your shares of DENTSPLY common stock or Sirona common stock.

Please follow the voting instructions provided by your broker, bank or other nominee so that it may vote your shares on your behalf. Please note that you may not vote shares held in “street name” by returning a proxy card directly to DENTSPLY or Sirona or by voting in person at your special meeting unless you first obtain a proxy from your broker, bank or other nominee.

DENTSPLY

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Sirona

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Sirona Stockholders:  If you properly complete and sign your proxy card but do not indicate how your shares of Sirona common stock should be voted on a matter, the shares of Sirona common stock represented by your proxy will be voted as the Sirona board of directors recommends and, therefore, “FOR” the proposal to adopt the merger agreement, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and “FOR” the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement (assuming a quorum is present).

If you are a holder of record of either DENTSPLY or Sirona shares:  If you are a holder of record of either DENTSPLY or Sirona common stock, as applicable, you can change your vote or revoke your proxy at any time before your proxy is voted at your respective special meeting. You can do this in one of three ways:

If you choose either of the first two methods, your notice of revocation or your new proxy must be received by DENTSPLY or Sirona, as applicable, no later than the beginning of the applicable special meeting. If you have submitted a proxy for your shares by telephone or via the Internet, you may revoke your prior telephone or Internet proxy by any manner described above.

If you hold shares of either DENTSPLY or Sirona in “street name”:  If your shares are held in “street name”, you must contact your broker, bank or other nominee to change your vote.

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Provided that the merger qualifies as a “reorganization” within the meaning of Section 368(a) of the Code, the holders of Sirona common stock generally will not recognize any gain or loss for U.S. federal income tax purposes on the exchange of shares of Sirona common stock for shares of DENTSPLY common stock in the merger, except with respect to any cash received in lieu of fractional shares of DENTSPLY common stock. A holder of Sirona common stock generally will recognize gain or loss with respect to cash received in lieu of a fractional share of DENTSPLY common stock in the merger measured by the difference, if any, between the amount of cash received for such fractional share and the holder’s tax basis in such fractional share. The obligations of DENTSPLY and Sirona to complete the merger are subject to, among other conditions described in this joint proxy statement/prospectus and the merger agreement, which is included as Annex A to this joint proxy statement/prospectus, the receipt by each of DENTSPLY and Sirona of the opinion of its respective counsel to the effect that the merger will qualify as a “reorganization” within the meaning of Section 368(a) of the Code.

You should read “U.S. Federal Income Tax Consequences of the Merger” beginning on page 125 for a more complete discussion of the U.S. federal income tax consequences of the merger. Tax matters can be complicated and the tax consequences of the merger to you will depend on your particular tax situation. You should consult your own tax adviser to determine the tax consequences of the merger to you.

Sirona Stockholders:  If you are a Sirona stockholder, after the merger is completed, each share of Sirona common stock you hold will be converted automatically into the right to receive 1.8142 shares of DENTSPLY common stock together with cash in lieu of any fractional shares, as applicable. You will receive instructions at that time regarding exchanging your shares of Sirona common stock for shares of DENTSPLY common stock. You do not need to take any action at this time. Please do not send your Sirona stock certificates with your proxy card.

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If you are a DENTSPLY stockholder:		If you are a Sirona stockholder:
Innisfree M&A Incorporated 501 Madison Avenue, 20th Floor New York, New York 10022 Stockholders May Call Toll-Free: 877-825-8964 Banks and Brokers May Call Collect: 212-750-5833		Georgeson Inc. 480 Washington Boulevard, 26th Floor Jersey City, NJ 07310 Stockholders May Call Toll-Free: 888-607-9107 sirona@georgeson.com (email)

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SUMMARY

This summary highlights selected information contained in this joint proxy statement/prospectus and does not contain all the information that may be important to you with respect to the merger and the other matters being considered at the DENTSPLY special meeting and Sirona special meeting. DENTSPLY and Sirona urge you to read carefully this joint proxy statement/prospectus in its entirety, including the attached Annexes, and the other documents to which we have referred you. See also the section entitled “Where You Can Find More Information” beginning on page 184. We have included page references in this summary to direct you to a more complete description of the topics presented below.

The Companies

DENTSPLY International Inc. (see page 27)

DENTSPLY International Inc., a Delaware corporation which dates its history to 1899, believes it is the world’s largest designer, developer, manufacturer and marketer of a broad range of consumable dental products for the professional dental market. DENTSPLY also manufactures and markets other consumable medical device products. DENTSPLY’s principal product categories are dental consumable products, dental laboratory products, dental specialty products and consumable medical device products.

DENTSPLY conducts its business in the United States, as well as in over 120 foreign countries, principally through its foreign subsidiaries. DENTSPLY has a long-established presence in the European market, particularly in Germany, Sweden, France, the United Kingdom, Switzerland and Italy, as well as in Canada. DENTSPLY also has a significant market presence in the countries of the Commonwealth of Independent States, Central and South America, the Middle-East region and the Pacific Rim.

DENTSPLY’s common stock is traded on the NASDAQ Global Select Market under the symbol “XRAY.”

The principal executive offices of DENTSPLY are located at the Susquehanna Commerce Center, 221 W. Philadelphia Street, York, Pennsylvania 17401, and its telephone number is (717) 845-7511.

Sirona Dental Systems, Inc. (see page 27)

Sirona Dental Systems, Inc., a Delaware corporation, is the leading global manufacturer of high-quality, technologically-advanced dental equipment, and is focused on developing, manufacturing, and marketing innovative solutions for dentists around the world. Sirona is uniquely positioned to benefit from several trends in the global dental industry, such as technological innovation, the shift to digital imaging, favorable demographic trends, and growing patient focus on dental health and cosmetic appearance.

Sirona’s common stock is traded on the NASDAQ Global Select Market under the symbol “SIRO.”

The principal executive offices of Sirona are located at 30-30 47^th Avenue, Suite 500, Long Island City, New York 11101, and its telephone number is (718) 482-2011.

Dawkins Merger Sub Inc. (see page 27)

Dawkins Merger Sub Inc., a wholly owned subsidiary of DENTSPLY, is a Delaware corporation that was formed on September 14, 2015 for the sole purpose of effecting the merger. In the merger, Dawkins Merger Sub Inc. will be merged with and into Sirona, with Sirona surviving as a wholly owned subsidiary of DENTSPLY.

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The Merger

A copy of the merger agreement is included as Annex A to this joint proxy statement/prospectus. DENTSPLY and Sirona encourage you to read the entire merger agreement carefully because it is the principal document governing the merger. For more information on the merger agreement, see the section entitled “The Merger Agreement” beginning on page 105.

Terms of the Merger (see page 105)

Subject to the terms and conditions of the merger agreement, at the effective time of the merger, Merger Sub, a wholly owned subsidiary of DENTSPLY formed for the sole purpose of effecting the merger, will be merged with and into Sirona. Sirona will survive the merger as a wholly owned subsidiary of DENTSPLY. Upon completion of the merger, DENTSPLY and Sirona, and their respective subsidiaries, will operate as a combined company under the name DENTSPLY SIRONA Inc.

Under the terms of the merger agreement, if certain conditions to the closing of the merger related to receipt of a tax opinion by each of DENTSPLY and Sirona cannot be satisfied and are not waived, DENTSPLY and Sirona may mutually agree to alter the structure of the transactions contemplated by the merger agreement by completing a second-step merger immediately following the merger of Merger Sub with and into Sirona. In this second-step merger, Sirona (as the surviving corporation of the merger between Merger Sub and Sirona) would merge with and into a Delaware limited liability company wholly owned by DENTSPLY that is disregarded as an entity separate from its owner for U.S. federal income tax purposes (the “second-step merger”).

Merger Consideration (see page 105)

Sirona stockholders will have the right to receive 1.8142 shares of DENTSPLY common stock for each share of Sirona common stock that is issued and outstanding immediately prior to the effective time of the merger (the “exchange ratio”). The exchange ratio is fixed and will not be adjusted for changes in the market value of the common stock of DENTSPLY or Sirona. As a result, the implied value of the consideration to Sirona stockholders will fluctuate between the date of this joint proxy statement/prospectus and the effective date of the merger. No fractional shares of DENTSPLY common stock will be issued in connection with the merger. Each Sirona stockholder that otherwise would have been entitled to receive a fraction of a share of DENTSPLY common stock will be entitled to receive cash in lieu of the fractional share. DENTSPLY stockholders will continue to own their existing shares, which will not be affected by the merger.

U.S. Federal Income Tax Consequences of the Merger (see page 125)

The merger is intended to qualify as a “reorganization” within the meaning of Section 368(a) of the Code. The merger for this purpose includes the merger of Merger Sub with and into Sirona and the second-step merger, if it occurs, as part of one integrated transaction for U.S. federal income tax purposes. Provided that the merger qualifies as a “reorganization” within the meaning of Section 368(a) of the Code, the holders of Sirona common stock generally will not recognize any gain or loss for U.S. federal income tax purposes on the exchange of shares of Sirona common stock for shares of DENTSPLY common stock in the merger, except with respect to any cash received in lieu of fractional shares of DENTSPLY common stock. A holder of Sirona common stock generally will recognize gain or loss with respect to cash received in lieu of a fractional share of DENTSPLY common stock in the merger measured by the difference, if any, between the amount of cash received for such fractional share and the holder’s tax basis in such fractional share. The obligations of DENTSPLY and Sirona to complete the merger are subject to, among other conditions described in this joint proxy statement/prospectus and the merger agreement, which is included as Annex A to this joint proxy statement/prospectus, the receipt by each of DENTSPLY and Sirona of the opinion of its respective counsel to the effect that the merger will qualify as a “reorganization” within the meaning of Section 368(a) of the Code.

You should read “U.S. Federal Income Tax Consequences of the Merger” beginning on page 125 for a more complete discussion of the U.S. federal income tax consequences of the merger. Tax matters can be complicated and the tax consequences of the merger to you will depend on your particular tax situation. You should consult your own tax adviser to determine the tax consequences of the merger to you.

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Recommendation of the Board of Directors of DENTSPLY (see page 28)

After careful consideration, the DENTSPLY board of directors unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of DENTSPLY and its stockholders. For more information regarding the factors considered by the DENTSPLY board of directors in reaching its decision to approve the merger agreement, to authorize the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and to approve DENTSPLY’s amended and restated certificate of incorporation, see the section entitled “The Merger — DENTSPLY’s Reasons for the Merger; Recommendation of the DENTSPLY Board of Directors.”

The DENTSPLY board of directors unanimously recommends that DENTSPLY stockholders vote “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger, “FOR” the proposal to approve the Plan and “FOR” the proposal to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation.

Recommendation of the Board of Directors of Sirona (see page 34)

After careful consideration, the Sirona board of directors unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of Sirona and its stockholders. For more information regarding the factors considered by the Sirona board of directors in reaching its decision to approve and adopt the merger agreement and the merger, see the section entitled “The Merger — Sirona’s Reasons for the Merger; Recommendation of the Sirona Board of Directors.”

The Sirona board of directors unanimously recommends that Sirona stockholders vote “FOR” the proposal to adopt the merger agreement, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and “FOR” the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement.

Opinion of DENTSPLY’s Financial Advisor (see page 52)

In connection with the merger, DENTSPLY’s board of directors received a written opinion, dated September 15, 2015, from DENTSPLY’s financial advisor, Moelis & Company LLC (“Moelis”), as to the fairness, from a financial point of view and as of the date of such opinion, of the exchange ratio in the merger to DENTSPLY. The full text of Moelis’ written opinion, dated September 15, 2015, which sets forth the assumptions made, procedures followed, matters considered and limitations on the review undertaken in connection with the opinion, is included as Annex B to this joint proxy statement/prospectus and is incorporated herein by reference. Stockholders are urged to read Moelis’ written opinion carefully and in its entirety. Moelis’ opinion was provided for the use and benefit of DENTSPLY’s board of directors (in its capacity as such) in its evaluation of the merger. Moelis’ opinion is limited solely to the fairness to DENTSPLY, from a financial point of view, of the exchange ratio and does not address DENTSPLY’s underlying business decision to effect the merger or the relative merits of the merger as compared to any alternative business strategies or transactions that might be available with respect to DENTSPLY. Moelis’ opinion does not constitute a recommendation to any DENTSPLY stockholder as to how such stockholder should vote or act with respect to the merger or any other matter.

Opinion of Sirona’s Financial Advisor (see page 63)

In connection with the merger, Sirona’s financial advisor, Jefferies LLC (“Jefferies”), delivered a written opinion, dated September 15, 2015, to the Sirona board of directors as to the fairness, from a financial point of view and as of such date, of the exchange ratio provided for in the merger agreement to holders of Sirona common stock. The full text of Jefferies’ opinion, which is included as Annex C to this joint proxy

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statement/prospectus and is incorporated herein by reference, describes the various assumptions made, procedures followed, matters considered and limitations and qualifications on the review undertaken by Jefferies. Jefferies’ opinion was provided for the use and benefit of the Sirona board of directors (in its capacity as such) in connection with its evaluation of the merger and did not address any aspect of the merger (other than the exchange ratio from a financial point of view) or any other matter. The opinion did not address the relative merits of the merger or other transactions contemplated by the merger agreement as compared to any alternative transaction or opportunity that might be available to Sirona, nor did it address the underlying business decision by Sirona to engage in the merger. Jefferies’ opinion does not constitute a recommendation as to how any stockholder should vote or act in connection with the merger or any other matter. The summary of Jefferies’ opinion set forth below is qualified in its entirety by reference to the full text of Jefferies’ opinion.

Interests of DENTSPLY Directors and Executive Officers in the Merger (see page 76)

Executive officers of DENTSPLY and members of DENTSPLY’s board of directors have certain interests in the merger that may be different from, or in addition to, the interests of DENTSPLY stockholders generally. These interests are described in further detail below, and certain of them are described and quantified in the narrative and table included under “— DENTSPLY Stockholder Advisory Vote On Merger-Related Compensation for DENTSPLY’s Named Executive Officers Proposal,” beginning on page 80. As described in further detail below under the heading “Interests of DENTSPLY Directors and Executive Officers in the Merger — Executive Officer Interests” beginning on page 77, under the merger agreement, DENTSPLY is permitted to establish a retention incentive plan for some or all of its employees (other than any of its named executive officers — i.e., those individuals whose compensation is subject to annual meeting proxy disclosure), by reason of their continued employment following execution of the merger agreement. Additionally, DENTSPLY may under the terms of the merger agreement act before completion of the merger to accelerate the vesting of equity awards (stock options and restricted stock units (RSUs) denominated in DENTSPLY common stock) held by some or all of its non-employee directors who will not continue as directors of the combined company after the merger, as described in further detail below under the heading “Interests of DENTSPLY Directors and Executive Officers in the Merger — Potential Non-Employee Director Equity Award Vesting” beginning on page 77.

Moreover, as detailed below under “— Board of Directors and Management Following the Merger” beginning on page 100, certain of DENTSPLY’s executive officers and members of DENTSPLY’s board of directors will continue to serve as officers or directors of the combined company upon completion of the merger and may participate in the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan as described in the section entitled “DENTSPLY Proposal — Approval of the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan” beginning on page 82. Specifically, Bret W. Wise, DENTSPLY’s current chairman and chief executive officer, will be the executive chairman of the board of directors of the combined company and may only be replaced as described in the section entitled “The Merger Agreement — Governance Matters After the Merger” beginning on page 114. In connection therewith it is intended that Mr. Wise will enter into a new employment agreement having such terms as are described more fully below in the section entitled “Interests of DENTSPLY Directors and Executive Officers in the Merger — Executive Officer Interests — Employment Agreement with Mr. Wise” beginning on page 78. DENTSPLY’s executive officers also have agreements that provide for severance benefits if their employment is terminated under certain circumstances, but, except as described below in regard to the contemplated employment agreement with Mr. Wise, the entitlement to those severance benefits is not affected by the merger. Additionally, Christopher T. Clark (the current president and chief financial officer of DENTSPLY) will serve as president and chief operating officer, technologies of the combined company, and James G. Mosch (the current executive vice president and chief operating officer of DENTSPLY) will serve as president and chief operating officer, dental and healthcare consumables of the combined company.

The DENTSPLY board of directors was aware of these interests and considered them, among other matters, in approving the merger agreement and the transactions contemplated by the merger agreement and in recommending that you vote “FOR” the proposal to issue shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation.

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Interests of Sirona Directors and Executive Officers in the Merger (see page 91)

Executive officers of Sirona and members of Sirona’s board of directors have interests in the merger that may be different from, or in addition to, the interests of Sirona stockholders generally. These interests are described in further detail below, and certain of them are described and quantified in the narrative and table included under “— Sirona Stockholder Advisory Vote On Merger-Related Compensation for Sirona’s Named Executive Officers Proposal,” beginning on page 95. As described in further detail below under the heading “Interests of Sirona Directors and Executive Officers in the Merger — Executive Officer Interests” beginning on page 92, under the merger agreement, Sirona is permitted to establish a retention incentive plan for some or all of its employees (other than any of its named executive officers — i.e., those individuals whose compensation is subject to annual meeting proxy disclosure), by reason of their continued employment following execution of the merger agreement.

Moreover, as detailed below under “— Board of Directors and Management Following the Merger,” certain of Sirona’s executive officers and members of Sirona’s board of directors will continue to serve as officers or directors of the combined company upon completion of the merger and may participate in the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan as described in the section entitled “DENTSPLY Proposal — Approval of the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan” beginning on page 82. Specifically, Jeffrey T. Slovin, Sirona’s current president and chief executive officer, will be the chief executive officer of the combined company and a member of the board of directors of the combined company and may only be replaced as described in the section entitled “Governance Matters After the Merger” beginning on page 114. In connection therewith it is intended that Mr. Slovin will enter into a new employment agreement having such terms as are described more fully below under “Interest of Sirona Directors and Executive Officers in the Merger —  New Slovin Employment Agreement” beginning on page 93. Furthermore, Ulrich Michel (the current executive vice president and chief financial officer of Sirona) will serve as executive vice president and chief financial officer of the combined company.

Additionally, Sirona may take action to vest each non-employee director who does not continue as a director of the combined company in all his outstanding RSUs in connection with the merger. Pursuant to the terms of his outstanding stock option and RSU agreements, Mr. Slovin will vest in full upon completion of the merger. However, under the terms of his new employment arrangement, Mr. Slovin will waive such acceleration of time-based vesting on such awards effective immediately prior to the merger, but will vest in such awards if his employment is terminated in certain circumstances following the merger. Mr. Michel (the current executive vice president and chief financial officer of Sirona) will also fully vest in his stock options in connection with the merger. Other management will have their stock options and RSUs vest if their employment is terminated following the merger under certain circumstances. Sirona’s executive officers also have agreements that provide for severance benefits if their employment is terminated under certain circumstances.

The Sirona board of directors was aware of these interests and considered them, among other matters, in approving the merger agreement and the transactions contemplated by the merger agreement and in recommending that you vote “FOR” the proposal to adopt the merger agreement.

Board of Directors and Management Following the Merger (see page 100)

Immediately following the effective time of the merger, the board of directors of the combined company will consist of eleven members, including: (i) six of the directors of DENTSPLY immediately prior to the merger, to be selected by DENTSPLY, of which one will be Mr. Wise (the current chairman of the board and chief executive officer of DENTSPLY) and (ii) five of the directors of Sirona immediately prior to the merger, to be selected by Sirona, of which one will be Mr. Slovin (a current director and the current president and chief executive officer of Sirona). All other director designees of DENTSPLY and Sirona will qualify as “independent directors” under NASDAQ rules. Upon completion of the merger, one director designated by Sirona will serve as the lead independent director of the combined company. As of the date of this joint proxy statement/prospectus, other than Mr. Wise, in the case of DENTSPLY, and Mr. Slovin, in the case of Sirona, neither DENTSPLY nor Sirona has made a determination as to which directors will be appointed to the board of directors of the combined company.

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Upon completion of the merger, Mr. Wise will serve as executive chairman of the board of directors of the combined company, and Mr. Slovin will serve as the chief executive officer of the combined company. As explained below in the section entitled “Governance Matters After the Merger” beginning on page 114, through the third anniversary of the effective date of the merger, the board of directors of the combined company may only replace, remove, alter the responsibilities and authorities or grant conflicting responsibilities or authorities of Mr. Wise, Mr. Slovin, or the lead independent director, as applicable, by the affirmative vote of the greater of (i) at least 70% of the entire board of directors and (ii) eight directors.

The combined company’s management team will include executives from each of DENTSPLY and Sirona. From DENTSPLY, Christopher T. Clark (the current president and chief financial officer of DENTSPLY) will serve as president and chief operating officer, technologies of the combined company, and James G. Mosch (the current executive vice president and chief operating officer of DENTSPLY) will serve as president and chief operating officer, dental and healthcare consumables of the combined company. From Sirona, Ulrich Michel (the current executive vice president and chief financial officer of Sirona) will serve as executive vice president and chief financial officer of the combined company. As of the date of this joint proxy statement/prospectus, other than Messrs. Wise, Clark and Mosch, in the case of DENTSPLY, and Messrs. Slovin and Michel, in the case of Sirona, neither DENTSPLY nor Sirona has made a determination as to which officers will be appointed to the management team of the combined company.

DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan (see page 82)

In connection with the merger, DENTSPLY, subject to stockholder approval, has adopted the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan (the “Plan”) to be used by the combined company for the benefit of its non-employee directors and combined workforce. The terms and conditions applicable under the Plan are further described under the section entitled “DENTSPLY Proposal — Approval of the DENTSPLY SIRONA Inc. 2016 Omnibus Incentive Plan.”

Treatment of DENTSPLY Equity Incentive Awards (see page 101)

The merger will not affect DENTSPLY’s stock options, restricted stock or other equity awards of DENTSPLY. All such awards will remain outstanding subject to the same terms and conditions that are applicable prior to the merger, including a provision that the award provisions may be equitably adjusted by the DENTSPLY board of directors to reflect the circumstances of the merger. However, under the terms of the merger agreement, DENTSPLY may act before completion of the merger to accelerate the vesting of equity awards (stock options and RSUs denominated in DENTSPLY common stock) held by some or all of its non-employee directors who will not continue as directors of the combined company after the merger.

Treatment of Sirona Stock Options, RSUs and Performance Units (see page 101)

Sirona Stock Options and Time Vested RSUs.  Upon completion of the merger, (i) each outstanding option to purchase shares of Sirona common stock and (ii) all outstanding RSUs that vest solely based on time will be converted pursuant to the merger agreement into, respectively, (x) an option to purchase shares of DENTSPLY common stock and (y) RSUs of DENTSPLY on the same terms and conditions as were in effect immediately prior to the completion of the merger based on the exchange ratio. Under the terms of the merger agreement Sirona may take action to vest all outstanding RSUs held by each of Sirona’s non-employee directors who will not continue as directors of the combined company after the merger, which will then be paid in shares of the combined company upon completion of the merger. Pursuant to the terms of his outstanding stock option and RSU agreements, Mr. Slovin will vest in full upon completion of the merger. However, under the terms of his new employment arrangement, Mr. Slovin will waive such acceleration of time-based vesting on such awards effective immediately prior to the merger, but will vest in such awards if his employment is terminated in certain circumstances following the merger. Mr. Michel’s stock options also will fully vest upon the completion of the merger, but not his RSUs. Mr. Michel’s RSUs will fully vest only if his employment is involuntarily terminated under certain circumstances. If any other employee’s employment is terminated without cause or constructively by the employee for “good reason” within twelve months following the completion of the merger, then all of such employee’s outstanding stock options and RSUs will vest in full and the stock options will remain exercisable for up to 180 days following the date of termination.

Sirona Performance Units.  Upon completion of the merger, all outstanding performance based restricted stock units (“performance units”), including those of Mr. Slovin and Mr. Michel, will be deemed to be earned

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at the maximum level of 200% in accordance with the terms of the applicable plan, and will be converted into the right to receive DENTSPLY common stock based on the exchange ratio. Vesting of the performance units will remain subject to continued employment by the participant through the end of the applicable performance period and they will continue to be paid on the normal payment date at the end of the performance period. However, vesting in the performance units and payment thereon will be accelerated upon the participant’s involuntary termination of employment under certain circumstances following the merger.

Regulatory Clearances Required for the Merger (see page 102)

DENTSPLY and Sirona have each agreed to take certain actions in order to obtain the regulatory clearances required to complete the merger. Required regulatory clearances include expiration or termination of the required waiting period under the Hart-Scott-Rodino Antitrust Improvement Act of 1976, as amended, and the rules and regulations promulgated thereunder (the “HSR Act”), following required notifications and review by either the Federal Trade Commission (the “FTC”) or the Antitrust Division of the U.S. Department of Justice (the “Antitrust Division”). On October 21, 2015, each of DENTSPLY and Sirona filed its notification under the HSR Act. The waiting period under the HSR Act expired as of November 21, 2015.

Required regulatory clearances also include clearance under applicable merger laws of the European Union. DENTSPLY and Sirona plan to file a formal merger notification with the European Commission as promptly as reasonably practicable, which the parties expect to be by the end of 2015. DENTSPLY and Sirona also expect to file notices with antitrust and competition authorities in certain other jurisdictions where necessary.

While DENTSPLY and Sirona expect to obtain all required regulatory clearances, we cannot assure you that these regulatory clearances will be obtained or that the granting of these regulatory clearances will not involve the imposition of additional conditions on the completion of the merger, including the requirement to divest assets, or require changes to the terms of the merger agreement. These conditions or changes could result in the conditions to the merger not being satisfied.

Amended and Restated Certificate of Incorporation of DENTSPLY (see page 76)

The DENTSPLY board of directors has approved, subject to stockholder approval and completion of the merger, an amended and restated certificate of incorporation to (i) change DENTSPLY’s name to “DENTSPLY SIRONA Inc.,” (ii) increase the number of authorized shares of DENTSPLY common stock to 400 million and (iii) provide that, until the third anniversary of the effective date of the merger, the board of directors may amend, alter or repeal the sections of the by-laws relating to (1) Mr. Wise’s service as executive chairman of the board and Mr. Slovin’s service as chief executive officer, (2) the replacement, removal or alteration of responsibilities of the lead independent director and (3) certain other governance matters concerning the combined company only by an affirmative vote of the greater of (a) at least 70% of the entire board of directors and (b) eight directors of the combined company. The form of amended and restated certificate of incorporation is included in this joint proxy statement/prospectus as Annex D. The adoption of the amended and restated certificate of incorporation by DENTSPLY’s stockholders is a condition to the completion of the merger. In the event this proposal is approved by DENTSPLY stockholders, but the merger is not completed, the amended and restated certificate of incorporation will not be filed with the Secretary of State of the State of Delaware and will not become effective.

Expected Timing of the Merger

DENTSPLY and Sirona are working to complete the merger as soon as practicable and expect the closing of the merger to occur in the first quarter of 2016. However, the merger is subject to various regulatory clearances and the satisfaction or waiver of other conditions, and it is possible that factors outside the control of DENTSPLY and Sirona could result in the merger being completed at an earlier time, at a later time or not at all. There may be a substantial amount of time between the DENTSPLY and Sirona special meetings and the completion of the merger.

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Conditions to Completion of the Merger (see page 118)

Each party’s obligation to consummate the merger is conditioned upon the satisfaction (or waiver by such party) at or prior to the closing of the merger of each of the following:

In addition, the obligations of each of DENTSPLY and Merger Sub, on the one hand, and Sirona, on the other hand, to effect the merger is subject to the satisfaction or waiver of the following additional conditions:

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No Solicitation of Alternative Proposals (see page 111)

The merger agreement prohibits DENTSPLY and Sirona from soliciting or engaging in discussions or negotiations with a third party with respect to a proposal for a competing transaction, including the acquisition of a significant interest in DENTSPLY or Sirona common stock or assets. However, if, prior to obtaining approval from its stockholders, DENTSPLY or Sirona, as the case may be, receives an unsolicited written proposal from a third party for a competing transaction that DENTSPLY’s or Sirona’s board of directors, as applicable, among other things, determines in good faith (i) after consultation with its outside legal and financial advisors, is reasonably likely to lead to a proposal that is superior to the merger and (ii) after consultation with its outside legal advisors, the failure to enter discussions regarding such proposal would be a breach of its fiduciary obligations under applicable law, DENTSPLY or Sirona, as applicable, may furnish non-public information to and enter into discussions with, and only with, that third party regarding such competing transaction.

Termination of the Merger Agreement (see page 120)

DENTSPLY and Sirona may mutually agree to terminate the merger agreement at any time. Either company may also terminate the merger agreement if the merger is not completed by March 15, 2016 (regardless of whether such date is before or after the stockholders of the party approve the transactions), subject to one or more extensions by either company in the event that certain regulatory clearances have not yet been obtained, provided that in no event will such extensions be to a date that is later than December 15, 2016. See the section entitled “The Merger Agreement — Termination of the Merger Agreement” for a discussion of these and other rights of each of DENTSPLY and Sirona to terminate the merger agreement.

Termination Fees and Expenses (see page 121)

Generally, all fees and expenses incurred in connection with the merger agreement and the transactions contemplated by the merger agreement will be paid by the party incurring those expenses, subject to the specific exceptions discussed in this joint proxy statement/prospectus where (i) DENTSPLY may be required to pay a termination fee of $280 million to Sirona and Sirona may be required to pay a termination fee of $205 million to DENTSPLY and (ii) either company may be required to reimburse the other company for merger-related expenses of up to $15 million under certain circumstances. See the section entitled “The Merger Agreement — Termination Fees and Expenses” for a discussion of the circumstances under which such termination fee will be required to be paid.

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Accounting Treatment (see page 127)

DENTSPLY prepares its financial statements in accordance with accounting principles generally accepted in the United States, which is referred to as GAAP. The merger will be accounted for using the acquisition method of accounting. DENTSPLY will be treated as the acquirer for accounting purposes.

No Appraisal Rights (see page 153)

Under Delaware law, neither the holders of shares of DENTSPLY common stock nor the holders of shares of Sirona common stock are entitled to exercise any appraisal rights in connection with the merger or the other transactions contemplated by the merger agreement.

Comparison of Stockholder Rights (see page 147)

Sirona stockholders receiving merger consideration will have different rights once they become stockholders of the combined company due to differences between the governing corporate documents of Sirona and the proposed governing corporate documents of the combined company. Please see the section entitled “Comparison of Rights of Sirona Stockholders and DENTSPLY SIRONA Stockholders” for a discussion of these differences.

Listing of Shares of DENTSPLY Common Stock; Delisting and Deregistration of Shares of Sirona Common Stock (see page 104)

It is a condition to the completion of the merger that the shares of DENTSPLY common stock to be issued to Sirona stockholders pursuant to the merger be authorized for listing, and DENTSPLY and Sirona have agreed to use their reasonable best efforts to cause such shares to be listed, on the NASDAQ (or such stock exchange as DENTSPLY and Sirona may mutually agree upon) subject to official notice of issuance. Upon completion of the merger, shares of Sirona common stock currently listed on the NASDAQ will cease to be listed on the NASDAQ and will be subsequently deregistered under the Exchange Act.

The Meetings

The DENTSPLY Special Meeting (see page 28)

The special meeting of DENTSPLY stockholders is scheduled to be held at 221 W. Philadelphia St., York, Pennsylvania 17401, on           , 2016, at         , local time, subject to any adjournments or postponements thereof. The special meeting of DENTSPLY stockholders is being held to consider and vote on:

Completion of the merger is conditioned on, among other things, approval of the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and the adoption of DENTSPLY’s amended and restated certificate of incorporation by DENTSPLY stockholders.

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Only holders of record of DENTSPLY common stock at the close of business on December 2, 2015, the record date for the DENTSPLY special meeting, are entitled to receive notice of, and to vote at, the DENTSPLY special meeting or any adjournments or postponements thereof. At the close of business on the record date, 140,035,386 shares of DENTSPLY common stock were outstanding, approximately 3.2% of which were owned and entitled to be voted by DENTSPLY directors and executive officers and their affiliates. We currently expect that DENTSPLY’s directors and executive officers will vote their shares in favor of each proposal being submitted to a vote of the DENTSPLY stockholders at the DENTSPLY special meeting, although no director or officer has entered into any agreement obligating him or her to do so.

You may cast one vote for each share of DENTSPLY common stock you own. The proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy and entitled to vote on the proposal. The proposal to adopt DENTSPLY’s amended and restated certificate of incorporation requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock entitled to vote on the proposal. Approval, on a non-binding advisory basis, of specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal, although such vote will not be binding on DENTSPLY or its board of directors or any of its committees. Approval of the Plan requires the affirmative vote of holders of a majority of the outstanding shares of DENTSPLY common stock present in person or represented by proxy at the DENTSPLY special meeting and entitled to vote on the proposal. Approval of the Plan is not required to consummate the merger. However, the DENTSPLY board of directors has made the proposed implementation of the Plan contingent upon the consummation of the merger. If the merger is not consummated, then the Plan will not be implemented, even if approved by DENTSPLY’s stockholders. If necessary or appropriate to solicit additional proxies if there are not sufficient votes to approve the proposal for the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, the holders of a majority of the outstanding shares entitled to vote and present in person or represented by proxy, and entitled to vote on the proposal may adjourn the meeting to another time or place without further notice unless the adjournment is for more than 30 days or if after the adjournment a new record date is fixed for the adjourned meeting, in which case a notice of the adjourned meeting shall be given to each stockholder of record entitled to vote at the meeting.

The Sirona Special Meeting (see page 34)

The special meeting of Sirona stockholders is scheduled to be held at            on           , 2016 at     , local time, subject to any adjournments or postponements thereof. The special meeting of Sirona’s stockholders is being held in order to consider and vote on:

Only holders of record of Sirona common stock at the close of business on December 2, 2015, the record date for the Sirona special meeting, are entitled to notice of, and to vote at, the Sirona special meeting or any adjournments or postponements thereof. At the close of business on the record date, 55,937,320 shares of Sirona common stock were issued and outstanding, approximately 2.5% of which were held by Sirona’s directors and executive officers and their affiliates. We currently expect that Sirona’s directors and executive officers will vote their shares in favor of each proposal being submitted to a vote of the Sirona stockholders at the Sirona special meeting, although no director or executive officer has entered into any agreement obligating him to do so.

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You may cast one vote for each share of Sirona common stock you own. The proposal to adopt the merger agreement requires the affirmative vote of the holders of a majority of the outstanding shares of Sirona common stock entitled to vote on the proposal. Approval, on a non-binding advisory basis, of specific compensatory arrangements between Sirona and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal, although such vote will not be binding on Sirona or its board of directors or any of its committees. If necessary or appropriate to solicit additional proxies if there are not sufficient votes to approve the proposal to adopt the merger agreement, the holders of a majority of the outstanding shares entitled to vote and present in person or represented by proxy, and entitled to vote on the proposal, may adjourn the meeting to another time or place without further notice unless the adjournment is for more than 30 days or if after the adjournment a new record date is fixed for the adjourned meeting, in which case a notice of the adjourned meeting shall be given to each stockholder of record entitled to notice of the meeting.

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SUMMARY HISTORICAL CONSOLIDATED FINANCIAL DATA

Summary Historical Consolidated Financial Data of DENTSPLY

The following statement of operations data for the years ended December 31, 2014, 2013 and 2012 and the balance sheet data as of December 31, 2014 and 2013 have been derived from the audited consolidated financial statements of DENTSPLY contained in its Annual Report on Form 10-K for the fiscal year ended December 31, 2014 as revised with respect to the consolidated financial statements insofar as it relates to the effects of business segment reclassifications and the change in accounting for debt issuance costs as contained in DENTSPLY’s Form 8-K filed on October 28, 2015, which is incorporated into this joint proxy statement/prospectus by reference. The statement of operations data for the years ended December 31, 2011 and 2010 and the balance sheet data as of December 31, 2012, 2011 and 2010 have been derived from DENTSPLY’s audited consolidated financial statements for such years, which have not been incorporated into this joint proxy statement/prospectus by reference.

The statement of operations data for the nine months ended September 30, 2015 and 2014 and the balance sheet data as of September 30, 2015 have been derived from DENTSPLY’s unaudited interim consolidated financial statements contained in its Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2015, which is incorporated into this joint proxy statement/prospectus by reference. The balance sheet data as of September 30, 2014 has been derived from DENTSPLY’s unaudited interim consolidated financial statements for such period, which have not been incorporated into this joint proxy statement/prospectus by reference. These financial statements are unaudited, but, in the opinion of DENTSPLY’s management, contain all adjustments necessary to present fairly DENTSPLY’s financial position, results of operations and cash flows for the period indicated.

You should read this summary historical financial data together with the financial statements that are incorporated by reference into this joint proxy statement/prospectus and their accompanying notes and management’s discussion and analysis of financial condition and results of operations of DENTSPLY contained in such reports.

Statement of Operations Data of DENTSPLY
(In millions of US dollars, except per share data)

		Nine Months Ended September 30,								Year ended December 31,
		2015				2014				2014				2013				2012				2011(a)				2010
Statement of Operations Data:
Net sales		$	2,003.2			$	2,203.6			$	2,922.6			$	2,950.8			$	2,928.4			$	2,537.7			$	2,221.0
Net sales, excluding precious metal content(b)			1,935.6				2,101.7				2,792.7				2,771.7				2,714.7				2,332.6				2,031.8
Gross profit			1,142.5				1,206.7				1,599.8				1,577.4				1,556.4				1,273.4				1,130.2
Restructuring and other costs			50.9				4.5				11.1				13.4				25.7				35.9				11.0
Operating income			282.1				342.3				445.6				419.2				381.9				300.7				380.3
Income before income taxes			257.4				309.7				404.4				369.3				330.7				256.1				357.7
Net income			192.5				238.2				322.9				318.2				318.5				247.4				267.3
Net income attributable to DENTSPLY International Inc.		$	192.6			$	238.1			$	322.9			$	313.2			$	314.2			$	244.5			$	265.7
Earnings per common share:
Basic		$	1.38			$	1.68			$	2.28			$	2.20			$	2.22			$	1.73			$	1.85
Diluted		$	1.35			$	1.65			$	2.24			$	2.16			$	2.18			$	1.70			$	1.82
Cash dividends declared per common share		$	0.2175			$	0.19875			$	0.265			$	0.250			$	0.220			$	0.205			$	0.200

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Balance Sheet Data of DENTSPLY
(In millions of US dollars)

		As of September 30,								Year Ended December 31,
		2015				2014				2014				2013				2012				2011				2010
Balance Sheet Data:
Cash and cash equivalents		$	236.4			$	97.7			$	151.6			$	75.0			$	80.1			$	77.1			$	540.0
Property, plant and equipment, net			555.2				606.9				588.8				637.2				614.7				591.4				423.1
Goodwill and other intangibles, net			2,584.7				2,870.8				2,760.2				3,076.9				3,041.6				2,981.2				1,381.8
Total assets			4,402.2				4,880.0				4,646.5				5,073.6				4,966.8				4,746.5				3,257.1
Total debt, current and long-term portions(a)			1,155.1				1,276.8				1,261.9				1,471.6				1,515.5				1,757.8				610.9
Equity			2,281.5				2,496.2				2,322.2				2,578.0				2,249.4				1,884.2				1,909.9

Summary Consolidated Historical Financial Data of Sirona

The following statement of income data for the years ended September 30, 2015, 2014 and 2013 and the balance sheet data as of September 30, 2015 and 2014 have been derived from the audited consolidated financial statements of Sirona contained in its Annual Report on Form 10-K for the fiscal year ended September 30, 2015, which is incorporated into this joint proxy statement/prospectus by reference. The statement of income data for the years ended September 30, 2012, 2011 and 2010 and the balance sheet data as of September 30, 2013, 2012, 2011 and 2010 have been derived from Sirona’s audited consolidated financial statements for such years, which have not been incorporated into this joint proxy statement/prospectus by reference.

You should read this summary historical financial data together with the financial statements that are incorporated by reference into this joint proxy statement/prospectus and their accompanying notes and management’s discussion and analysis of financial condition and results of operations of Sirona contained in such reports.

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Statement of Income Data of Sirona
(In millions of US dollars, except per share data)

		Year ended September 30,
		2015				2014				2013				2012				2011				2010
Selected Income Statement Data:
Revenue		$	1,161.3			$	1,171.1			$	1,101.5			$	979.4			$	913.9			$	770.3
Gross profit			648.2				641.7				591.4				524.0				483.7				399.0
Operating income			258.3				238.1				212.8				185.8				160.9				128.1
Income before taxes			242.9				230.4				197.5				178.3				159.5				115.2
Net income			188.1				177.4				148.5				135.6				123.8				91.4
Net income attributable to Sirona Dental Systems, Inc.		$	186.2			$	175.7			$	146.7			$	133.8			$	121.8			$	90.0
Income per share (attributable to Sirona Dental Systems, Inc. common shareholders):
Basic		$	3.35			$	3.18			$	2.67			$	2.41			$	2.19			$	1.63
Diluted		$	3.30			$	3.13			$	2.61			$	2.36			$	2.13			$	1.59

Balance Sheet Data of Sirona
(In millions of US dollars)

		As of September 30,
		2015				2014				2013				2012				2011				2010
Selected Balance Sheet Data:
Cash and cash equivalents		$	517.8			$	382.8			$	241.7			$	151.1			$	345.9			$	251.8
Working capital(1),(2)			581.5				449.8				317.0				222.9				46.2				297.6
Total assets			1,902.3				1,811.0				1,738.4				1,494.7				1,726.1				1,592.9
Non-current liabilities(2)			266.3				312.5				334.3				315.9				255.0				625.2
Total liabilities			561.4				549.8				580.4				502.3				790.2				785.3
Retained earnings			946.1				759.9				584.2				437.5				303.6				181.8
Sirona Dental Systems, Inc. Shareholders' equity			1,338.2				1,258.8				1,155.6				989.4				932.3				805.4
Total shareholders' equity			1,340.9				1,261.2				1,158.0				992.4				935.9				807.6
Net cash (debt)(3)		$	437.6			$	303.3			$	166.3			$	75.6			$	(22.5	)		$	(119.0	)

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SELECTED UNAUDITED PRO FORMA COMBINED
FINANCIAL INFORMATION OF DENTSPLY AND SIRONA

The following table shows selected unaudited pro forma combined financial information regarding the financial condition and results of operations of DENTSPLY after giving effect to the merger with Sirona. The selected unaudited pro forma combined financial statements have been prepared using the acquisition method of accounting for business combinations pursuant to the provisions of Accounting Standards Codification (“ASC”) Topic 805, Business Combinations (“ASC 805”) and otherwise in accordance with GAAP under which the assets and liabilities of Sirona will be recorded by DENTSPLY at their respective fair values as of the date the merger is completed. The selected unaudited pro forma combined balance sheet assumes that the merger took place on September 30, 2015. The selected unaudited pro forma combined statements of operations for the fiscal year ended December 31, 2014, and for the nine months ended September 30, 2015, assume that the merger took place on January 1, 2014, the beginning of the earliest period presented.

The selected unaudited pro forma combined financial information has been derived from and should be read in conjunction with (i) the section entitled “The Merger — Reasons for the Merger — Certain Financial Projections Utilized by the DENTSPLY Board of Directors and DENTSPLY’s Financial Advisor” and the related notes beginning on page 74, and (ii) the more detailed unaudited pro forma combined financial statements of the combined company appearing elsewhere in this joint proxy statement/prospectus and the accompanying notes to the unaudited pro forma combined financial statements. See “Unaudited Pro Forma Combined Financial Information” beginning on page 128. In addition, the selected unaudited pro forma combined financial statements should be read in conjunction with the historical consolidated financial statements and related notes of both DENTSPLY and Sirona for the applicable periods, which have been incorporated in this joint proxy statement/prospectus by reference. See “Where You Can Find More Information” beginning on page 184.

The selected unaudited pro forma combined financial information has been presented for informational purposes only. The selected unaudited pro forma combined financial information is not necessarily indicative of what the combined company’s financial position or results of operations actually would have been had the merger been completed as of the dates indicated. In addition, the selected unaudited pro forma combined financial information does not purport to project the future financial position or operating results of the combined company.

Selected Unaudited Pro Forma Combined Statement of Operations Data

(in millions of US dollars, except per share data)		Nine Months Ended September 30, 2015				Year Ended December 31, 2014
Net sales		$	2,857.6			$	4,089.8
Net sales, excluding precious metal content(a)			2,790.0				3,959.9
Gross profit			1,605.6				2,216.6
Restructuring and other costs			50.9				11.1
Operating income			413.4				588.8
Income before income taxes			380.9				541.8
Net income			294.7				437.9
Net income attributable to DENTSPLY International		$	293.0			$	436.2
Earnings per common share:
Basic		$	1.21			$	1.79
Diluted		$	1.19			$	1.76

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Selected Unaudited Pro Forma Combined Balance Sheet

(in millions of US dollars)		As of September 30, 2015
Cash and cash equivalents		$	754.2
Property, plant and equipment, net			777.2
Goodwill and other intangibles, net			9,169.6
Total assets			12,150.7
Total debt, current and long-term portions			1,235.3
Equity			8,682.2

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UNAUDITED COMPARATIVE PER SHARE DATA

Presented below are DENTSPLY’s historical per share data for the nine months ended September 30, 2015 and the year ended December 31, 2014, Sirona’s historical per share data for the nine months ended June 30, 2015 and the year ended September 30, 2014, and unaudited pro forma combined per share data for the nine months ended September 30, 2015 and the year ended December 31, 2014. This information should be read together with the consolidated financial statements and related notes of DENTSPLY and Sirona that are incorporated by reference in this joint proxy statement/prospectus and with the unaudited pro forma combined financial data included under “Unaudited Pro Forma Combined Financial Information” beginning on page 128. The pro forma information is presented for illustrative purposes only and is not necessarily indicative of the operating results or financial position that would have occurred if the merger had been completed as of the beginning of the periods presented, nor is it necessarily indicative of the future operating results or financial position of the combined company. In addition, because DENTSPLY has a fiscal year-end of December 31 and Sirona has a fiscal year-end of September 30, the following unaudited pro forma combined per share data for the nine months ended September 30, 2015 and the year ended December 31, 2014 combines the historical per share data of DENTSPLY for the nine months ended September 30, 2015 and its fiscal year ended December 31, 2014 and the historical per share data of Sirona for the nine months ended June 30, 2015 and its fiscal year ended September 30, 2014. The historical book value per share is computed by dividing total stockholders’ equity by the number of shares of common stock outstanding at the end of the period. The pro forma earnings per share of the combined company is computed by dividing the pro forma net income by the pro forma weighted average number of shares outstanding. The pro forma book value per share of the combined company is computed by dividing total pro forma stockholders’ equity by the pro forma number of shares of common stock outstanding at the end of the period. The Sirona unaudited pro forma equivalent per share financial information is computed by multiplying the DENTSPLY unaudited pro forma combined per share amounts by the exchange ratio (1.8142 shares of DENTSPLY common stock for each share of Sirona common stock).

DENTSPLY-Historical		Nine Months Ended September 30, 2015				Year Ended December 31, 2014
Earnings per common share:
Basic		$	1.38			$	2.28
Diluted		$	1.35			$	2.24
Book value per share of common stock		$	16.32			$	16.48
Dividends per share of common stock		$	0.2175			$	0.265

Sirona-Historical		Nine Months Ended June 30, 2015				Year Ended September 30, 2014
Earnings per common share:
Basic		$	2.53			$	3.18
Diluted		$	2.50			$	3.13
Book value per share of common stock		$	23.04			$	22.78
Dividends per share of common stock			—				—

DENTSPLY pro forma combined amounts		Nine Months Ended September 30, 2015				Year Ended December 31, 2014
Earnings per common share:
Basic		$	1.21			$	1.79
Diluted		$	1.19			$	1.76
Book value per share of common stock		$	35.99				N/A

Sirona pro forma equivalent per share data		Nine Months Ended September 30, 2015				Year Ended December 31, 2014
Earnings per common share:
Basic		$	2.20			$	3.25
Diluted		$	2.17			$	3.20
Book value per share of common stock		$	65.30				N/A

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This joint proxy statement/prospectus and the documents incorporated by reference into this joint proxy statement/prospectus contain, in addition to historical information, “forward-looking statements” (as defined in the Securities Litigation Reform Act of 1995) regarding, among other things, future events or the future financial performance of DENTSPLY and Sirona. Words such as “anticipate,” “expect,” “project,” “intend,” “believe,” and words and terms of similar substance used in connection with any discussion of future plans, actions or events identify forward-looking statements. Forward-looking statements relating to the proposed transaction include, but are not limited to: statements about the benefits of the proposed transaction between DENTSPLY and Sirona, including future financial and operating results; DENTSPLY’s and Sirona’s plans, objectives, expectations and intentions; the expected timing of completion of the proposed transaction; and other statements relating to the merger that are not historical facts. Forward-looking statements are based on information currently available to DENTSPLY and Sirona and involve estimates, expectations and projections. Investors are cautioned that all such forward-looking statements are subject to risks and uncertainties, and important factors could cause actual events or results to differ materially from those indicated by such forward-looking statements. With respect to the proposed transaction between DENTSPLY and Sirona, these factors, in addition to those set forth under “Risk Factors,” beginning on page 21, could include, but are not limited to: the risk that DENTSPLY or Sirona may be unable to obtain governmental and regulatory approvals required for the transaction, or that required governmental and regulatory approvals may delay the transaction or result in the imposition of conditions that could reduce the anticipated benefits from the proposed transaction or cause the parties to abandon the proposed transaction; the risk that a condition to closing of the transaction may not be satisfied; the length of time necessary to consummate the proposed transaction, which may be longer than anticipated for various reasons; the risk that the businesses will not be integrated successfully; the risk that the cost savings, synergies and growth from the proposed transaction may not be fully realized or may take longer to realize than expected; the diversion of management time on transaction-related issues; the effect of future regulatory or legislative actions on the companies or the industries in which they operate; the risk that the credit ratings of the combined company or its subsidiaries may be different from what the companies expect; economic and foreign exchange rate volatility; the continued strength of the dental and medical device markets; unexpected changes relating to competitive factors in the dental and medical devices industries; the timing, success and market reception for DENTSPLY’s and Sirona’s new and existing products; the possibility of new technologies outdating DENTSPLY’s or Sirona’s products; the outcomes of any litigation; continued support of DENTSPLY’s or Sirona’s products by influential dental and medical professionals; changes in the general economic environment, or social or political conditions, that could affect the businesses; the potential impact of the announcement or consummation of the proposed transaction on relationships with customers, suppliers, competitors, management and other employees; the ability to attract new customers and retain existing customers in the manner anticipated; the ability to hire and retain key personnel; reliance on and integration of information technology systems; the risks associated with assumptions the parties make in connection with the parties’ critical accounting estimates and legal proceedings; and the potential of international unrest, economic downturn or effects of currencies, tax assessments, tax adjustments, anticipated tax rates, raw material costs or availability, benefit or retirement plan costs, or other regulatory compliance costs.

Additional information concerning these and other risk factors is also contained in DENTSPLY’s and Sirona’s most recently filed Annual Reports on Form 10-K, subsequent Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and other SEC filings.

Many of these risks, uncertainties and assumptions are beyond DENTSPLY’s or Sirona’s ability to control or predict. Because of these risks, uncertainties and assumptions, you should not place undue reliance on these forward-looking statements. Furthermore, forward-looking statements speak only as of the information currently available to the parties on the date they are made, and neither DENTSPLY nor Sirona undertakes any obligation to update publicly or revise any forward-looking statements to reflect events or circumstances that may arise after the date of this communication. Nothing in this communication is intended, or is to be construed, as a profit forecast or to be interpreted to mean that earnings per DENTSPLY share or Sirona share for the current or any future financial years or those of the combined company, will necessarily match or exceed the historical published earnings per DENTSPLY share or Sirona share, as applicable. Neither DENTSPLY nor Sirona gives any assurance (1) that either DENTSPLY or Sirona will achieve its

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expectations, or (2) concerning any result or the timing thereof, in each case, with respect to any regulatory action, administrative proceedings, government investigations, litigation, warning letters, consent decree, cost reductions, business strategies, earnings or revenue trends or future financial results. All subsequent written and oral forward-looking statements concerning DENTSPLY, Sirona, the proposed transaction, the combined company or other matters and attributable to DENTSPLY or Sirona or any person acting on their behalf are expressly qualified in their entirety by the cautionary statements above.

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RISK FACTORS

In addition to the other information included and incorporated by reference in this joint proxy statement/prospectus, including the matters addressed in the section entitled “Special Note Regarding Forward-Looking Statements,” you should carefully consider the following risks before deciding how to vote. In addition, you should read and consider the risks associated with each of the businesses of DENTSPLY and Sirona because these risks will also affect the combined company. These risks can be found in the Annual Report on Form 10-K for the fiscal year ended December 31, 2014 as revised with respect to the consolidated financial statements insofar as it relates to the effects of business segment reclassifications and the change in accounting for debt issuance costs as contained in DENTSPLY’s Form 8-K filed on October 28, 2015, in the case of DENTSPLY, and in the Annual Report on Form 10-K for the fiscal year ended September 30, 2014, and any amendments thereto, in the case of Sirona, as such risks may be updated or supplemented in each company’s subsequently filed Quarterly Reports on Form 10-Q or Current Reports on Form 8-K, which are incorporated by reference into this joint proxy statement/prospectus. You should also read and consider the other information in this joint proxy statement/prospectus and the other documents incorporated by reference in this joint proxy statement/prospectus. See the section entitled “Where You Can Find More Information” beginning on page 184.

Risk Factors Relating to the Merger

The exchange ratio is fixed and will not be adjusted in the event of any change in either DENTSPLY’s or Sirona’s stock price.

Upon closing of the merger, each share of Sirona common stock will be converted into the right to receive 1.8142 shares of DENTSPLY common stock. This exchange ratio will not be adjusted for changes in the market price of either DENTSPLY common stock or Sirona common stock between the date of signing the merger agreement and completion of the merger. Changes in the price of DENTSPLY common stock prior to the merger will affect the value of DENTSPLY common stock that Sirona common stockholders will receive on the date of the merger. The exchange ratio will be adjusted appropriately to fully reflect the effect of any stock dividend or distribution, reclassification, stock split (including a reverse stock split), recapitalization, split-up, combination, exchange of shares, readjustment or other similar transaction with respect to the shares of either DENTSPLY common stock or Sirona common stock prior to the closing of the merger.

The prices of DENTSPLY common stock and Sirona common stock at the closing of the merger may vary from their prices on the date the merger agreement was executed, on the date of this joint proxy statement/prospectus and on the date of each stockholder meeting. As a result, the value represented by the exchange ratio will also vary. For example, based on the range of closing prices of DENTSPLY common stock during the period from September 14, 2015, the last trading day before public announcement of the merger, through December 2, 2015, the latest practicable trading date before the date of this joint proxy statement/prospectus, the exchange ratio represented a value ranging from a high of $113.29 to a low of $91.34 for each share of Sirona common stock.

These variations could result from changes in the business, operations or prospects of DENTSPLY or Sirona prior to or following the merger, regulatory considerations, general market and economic conditions and other factors both within and beyond the control of DENTSPLY or Sirona. We may complete the merger a considerable period after the dates of both the DENTSPLY special meeting and the Sirona special meeting. Therefore, at the time of the Sirona special stockholders meeting, Sirona stockholders will not know with certainty the value of the shares of DENTSPLY common stock that they will receive upon completion of the merger.

The merger is subject to the receipt of consents and clearances from domestic and foreign regulatory authorities that may impose conditions that could have an adverse effect on DENTSPLY, Sirona or the combined company or, if not obtained, could prevent completion of the merger.

Before the merger may be completed, applicable waiting periods must expire or terminate under antitrust and competition laws. In deciding whether to grant regulatory clearances, the relevant governmental entities will consider the effect of the merger on competition within their relevant jurisdiction. The terms and

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conditions of the approvals that are granted may impose requirements, limitations or costs or place restrictions on the conduct of the combined company’s business. The merger agreement may require DENTSPLY and/or Sirona to comply with conditions imposed by regulatory entities and, in certain circumstances, either company may refuse to close the merger on the basis of those regulatory conditions. There can be no assurance that regulators will not impose conditions, terms, obligations or restrictions and that such conditions, terms, obligations or restrictions will not have the effect of delaying completion of the merger or imposing additional material costs on or materially limiting the revenues of the combined company following the merger. In addition, neither DENTSPLY nor Sirona can provide assurance that any such conditions, terms, obligations or restrictions will not result in the delay or abandonment of the merger. For a more detailed description of the regulatory review process, see the section entitled “The Merger — Regulatory Clearances Required for the Merger” beginning on page 102.

Any delay in completing the merger may reduce or eliminate the benefits expected to be achieved thereunder.

In addition to the required regulatory clearances, the merger is subject to a number of other conditions beyond DENTSPLY’s and Sirona’s control that may prevent, delay or otherwise materially adversely affect its completion. We cannot predict whether and when these other conditions will be satisfied. Furthermore, the requirements for obtaining the required clearances and approvals could delay the completion of the merger for a significant period of time or prevent it from occurring. Any delay in completing the merger could cause the combined company not to realize, or to be delayed in realizing, some or all of the synergies that we expect to achieve if the merger is successfully completed within its expected time frame. See “The Merger Agreement — Conditions to Completion of the Merger” beginning on page 118.

Uncertainties associated with the merger may cause a loss of management personnel and other key employees which could adversely affect the future business and operations of the combined company.

DENTSPLY and Sirona are dependent on the experience and industry knowledge of their respective officers and other key employees to execute their business plans. The combined company’s success after the merger will depend in part upon the ability of DENTSPLY and Sirona to retain key management personnel and other key employees. Current and prospective employees of DENTSPLY and Sirona may experience uncertainty about their roles within the combined company following the merger, which may have an adverse effect on the ability of each of DENTSPLY and Sirona to attract or retain key management and other key personnel. Accordingly, no assurance can be given that the combined company will be able to attract or retain key management personnel and other key employees of DENTSPLY and Sirona to the same extent that DENTSPLY and Sirona have previously been able to attract or retain their own employees. A failure by DENTSPLY, Sirona or, following the completion of the merger, the combined company to attract, retain and motivate executives and other key employees during the period prior to or after the completion of the merger could have a negative impact on their respective businesses.

Lawsuits have been filed against DENTSPLY and Sirona’s board of directors challenging the merger and an adverse ruling may prevent the merger from being completed.

DENTSPLY, Merger Sub and the members of Sirona’s board of directors were named as defendants in lawsuits brought by Sirona stockholders challenging the merger and seeking, among other things, injunctive relief to enjoin the defendants from completing the merger on the agreed-upon terms. Additional lawsuits may be filed against DENTSPLY, Merger Sub, Sirona and/or their respective directors or officers in connection with the merger. See “The Merger — Litigation Related to the Merger” beginning on page 104 for more information about the lawsuits that have been filed related to the merger.

One of the conditions to the closing of the merger is the absence of any order, injunction, decree, statute, rule or regulation by a court or other governmental entity that makes illegal or prohibits the consummation of the merger or the other transactions contemplated by the merger agreement. Consequently, if a settlement or other resolution is not reached in the lawsuits referenced above and the plaintiffs secure injunctive or other relief prohibiting, delaying or otherwise adversely affecting the parties’ ability to complete the merger, then such injunctive or other relief may prevent the merger from becoming effective within the expected time frame or at all.

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Failure to complete the merger could negatively impact the stock prices and the future business and financial results of DENTSPLY and Sirona.

Completion of the merger is not assured and is subject to risks, including the risks that approval of the transactions by stockholders of DENTSPLY and Sirona or by governmental entities will not be obtained or that certain other closing conditions will not be satisfied. If the merger is not completed, the ongoing businesses and financial results of DENTSPLY and/or Sirona may be adversely affected and DENTSPLY and/or Sirona will be subject to several risks, including the following:

If the merger is not completed, DENTSPLY and Sirona cannot assure their respective stockholders that these risks will not materialize and will not materially adversely affect the business, financial results and stock prices of DENTSPLY or Sirona.

The merger agreement contains provisions that could discourage a potential competing acquiror of either DENTSPLY or Sirona.

The merger agreement contains “no shop” provisions that, subject to limited exceptions, restrict each of DENTSPLY’s and Sirona’s ability to solicit, initiate or knowingly encourage and induce, or take any other action designed to facilitate competing third-party proposals relating to a merger, reorganization or consolidation of the company or an acquisition of the company’s stock or assets. Further, even if the DENTSPLY board of directors or the Sirona board of directors withdraws or qualifies its recommendation with respect to the merger, DENTSPLY or Sirona, as the case may be, will still be required to submit each of their merger-related proposals to a vote at their respective special meetings. In addition, the other party generally has an opportunity to offer to modify the terms of the merger in response to any competing acquisition proposals before the board of directors of the company that has received a third-party proposal may withdraw or qualify its recommendation with respect to the merger. See “The Merger Agreement — No Solicitation of Alternative Proposals” beginning on page 111, “The Merger Agreement — Termination of the Merger Agreement” beginning on page 120 and “The Merger Agreement — Expenses and Termination Fees; Liability for Breach” beginning on page 121.

These provisions could discourage a potential third-party acquiror that might have an interest in acquiring all or a significant portion of DENTSPLY or Sirona from considering or proposing that acquisition, even if it were prepared to pay consideration with a higher per share cash or market value than the market value proposed to be received or realized in the merger or might result in a potential third-party acquiror proposing to pay a lower price to the stockholders than it might otherwise have proposed to pay because of the added expense of the $280 million or $205 million termination fee, as applicable, that may become payable in certain circumstances.

If the merger agreement is terminated and either DENTSPLY or Sirona determines to seek another business combination, it may not be able to negotiate a transaction with another party on terms comparable to, or better than, the terms of the merger.

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DENTSPLY’s and Sirona’s executive officers and directors have certain interests in the merger that may be different from, or in addition to, the interests of DENTSPLY and Sirona stockholders generally.

DENTSPLY’s and Sirona’s executive officers and directors have certain interests in the merger that may be different from, or in addition to, the interests of DENTSPLY stockholders and Sirona stockholders generally. DENTSPLY’s executive officers and Sirona’s executive officers negotiated the terms of the merger agreement. The executive officers of DENTSPLY and Sirona have arrangements with DENTSPLY or Sirona, as applicable, that provide for severance benefits if their employment is terminated under certain circumstances following the completion of the merger. In addition, certain of Sirona’s compensation and benefit plans and arrangements provide for payment or accelerated vesting or distribution of certain rights or benefits upon completion of the merger. Under the merger agreement, DENTSPLY and Sirona may act before completion of the merger to accelerate the vesting of equity awards (RSUs and, in the case of DENTSPLY, also stock options) held by some or all of its non-employee directors who will not continue as directors of the combined company after the merger. Executive officers and directors also have rights to indemnification and directors’ and officers’ liability insurance that will survive completion of the merger.

Upon completion of the merger, the board of directors of the combined company will be comprised of eleven members, consisting of six of DENTSPLY’s current directors and five of Sirona’s current directors. Mr. Slovin, currently a director and the president and chief executive officer of Sirona, will serve as a director and as chief executive officer of the combined company, and Mr. Wise, the current chairman and chief executive officer of DENTSPLY, will serve as executive chairman of the board of directors of the combined company. Additionally, the combined company’s management team will include executives from each of DENTSPLY and Sirona. From DENTSPLY, Christopher T. Clark (the current president and chief financial officer of DENTSPLY) will serve as president and chief operating officer, technologies of the combined company, and James G. Mosch (the current executive vice president and chief operating officer of DENTSPLY) will serve as president and chief operating officer, dental and healthcare consumables of the combined company. From Sirona, Ulrich Michel (the current executive vice president and chief financial officer of Sirona) will serve as executive vice president and chief financial officer of the combined company.

The DENTSPLY and Sirona boards of directors were aware of these interests at the time each approved the merger and the transactions contemplated by the merger agreement. These interests, including the continued employment of certain executive officers of DENTSPLY and Sirona by the combined company, the continued positions of certain directors of DENTSPLY and Sirona as directors of the combined company and the indemnification of former directors and officers by the combined company, may cause DENTSPLY’s and Sirona’s directors and executive officers to view the merger proposal differently and more favorably than you may view it. See “The Merger — Interests of DENTSPLY Directors and Executive Officers in the Merger” beginning on page 76 and “The Merger — Interests of Sirona Directors and Executive Officers in the Merger” beginning on page 91 for more information.

Current holders of DENTSPLY and Sirona common stock will have a reduced ownership and voting interest after the merger and will exercise less influence over management.

Current holders of DENTSPLY and Sirona common stock have the right to vote in the election of the board of directors and on other matters affecting DENTSPLY and Sirona, respectively. Upon the completion of the merger, each Sirona stockholder who receives shares of DENTSPLY common stock will become a stockholder of the combined company with a percentage ownership of the combined company that is smaller than such stockholder’s percentage ownership of Sirona. Similarly, after completion of the merger, the shares of combined company common stock retained by each DENTSPLY stockholder will represent a smaller percentage ownership of the combined company. It is currently expected that the stockholders of Sirona immediately prior to the effective time of the merger as a group will receive shares in the merger constituting approximately 42% of the shares of combined company common stock on a fully diluted basis immediately after the merger. As a result, stockholders of DENTSPLY immediately prior to the effective time of the merger as a group will own approximately 58% of the shares of combined company common stock on a fully diluted basis immediately after the merger. Because of this, DENTSPLY and Sirona stockholders will have less influence on the management and policies of the combined company than they now have on the management and policies of DENTSPLY and Sirona, respectively.

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Risk Factors Relating to the Combined Company Following the Merger

The combined company may be unable to integrate successfully the businesses of DENTSPLY and Sirona and realize the anticipated benefits of the merger.

The success of the merger will depend, in large part, on the ability of the combined company to realize the anticipated benefits, including cost savings, from combining the businesses of DENTSPLY and Sirona. To realize these anticipated benefits, the businesses of DENTSPLY and Sirona must be successfully integrated. This integration will be complex and time consuming. The failure to integrate successfully and to manage successfully the challenges presented by the integration process may result in the combined company not fully achieving the anticipated benefits of the merger. Potential difficulties the combined company may encounter as part of the integration process include the following:

In addition, DENTSPLY and Sirona have operated and, until the completion of the merger, will continue to operate independently. It is possible that the integration process could result in:

The merger may not be accretive and may cause dilution to the combined company’s adjusted earnings per share, which may negatively affect the market price of the combined company’s common stock.

DENTSPLY and Sirona currently anticipate that the merger will be accretive to stockholders on an adjusted earnings per share basis within the first full year following the completion of the merger. This expectation is based on preliminary estimates, which may materially change. The combined company could also encounter additional transaction and integration-related costs or other factors such as the failure to realize all of the benefits anticipated in the merger. All of these factors could cause dilution to the combined company’s adjusted earnings per share or decrease or delay the expected accretive effect of the merger and cause a decrease in the market value of the combined company’s common stock.

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The future results of the combined company will suffer if the combined company does not effectively manage its expanded operations following the merger.

Following the merger, the size of the business of the combined company will increase significantly beyond the current size of either DENTSPLY’s or Sirona’s business. The combined company’s future success depends, in part, upon its ability to manage this expanded business, which will pose substantial challenges for management, including challenges related to the management and monitoring of new operations and associated increased costs and complexity. There can be no assurances that the combined company will be successful or that it will realize the expected operating efficiencies, cost savings, revenue enhancements and other benefits currently anticipated from the merger.

The combined company is expected to incur substantial expenses related to the merger and the integration of DENTSPLY and Sirona.

The combined company is expected to incur substantial expenses in connection with the merger and the integration of DENTSPLY and Sirona. There are a large number of processes, policies, procedures, operations, technologies and systems that must be integrated, including purchasing, accounting and finance, sales, payroll, pricing, revenue management, manufacturing, research and development, marketing and benefits. While DENTSPLY and Sirona have assumed that a certain level of expenses would be incurred, there are many factors beyond their control that could affect the total amount or the timing of the integration expenses. Moreover, many of the expenses that will be incurred are, by their nature, difficult to estimate accurately. These expenses could, particularly in the near term, exceed the savings that the combined company expects to achieve from the elimination of duplicative expenses and the realization of economies of scale and cost savings. These integration expenses likely will result in the combined company taking significant charges against earnings following the completion of the merger, and the amount and timing of such charges are uncertain at present.

The unaudited pro forma combined financial information included in this joint proxy statement/prospectus may not be indicative of what the combined company’s actual financial position or results of operations would have been.

The unaudited pro forma combined financial information included in this joint proxy statement/prospectus is presented solely for illustrative purposes and is not necessarily indicative of what the combined company’s actual financial position or results of operations would have been had the merger been completed on the dates indicated. This unaudited pro forma combined financial information reflects adjustments that were developed using preliminary estimates based on available information and various assumptions and may be revised as additional information becomes available. Accordingly, the final acquisition accounting adjustments may differ materially from the pro forma adjustments reflected in this joint proxy statement/prospectus.

Other Risk Factors of DENTSPLY and Sirona

DENTSPLY’s and Sirona’s businesses are and will be subject to the risks described above. In addition, DENTSPLY’s and Sirona’s businesses are, and will continue to be, subject to the risks described in DENTSPLY’s Annual Report on Form 10-K for the fiscal year ended December 31, 2014 as revised with respect to the consolidated financial statements insofar as it relates to the effects of business segment reclassifications and the change in accounting for debt issuance costs as contained in DENTSPLY’s Form 8-K filed on October 28, 2015, and Sirona’s Annual Report on Form 10-K for the fiscal year ended September 30, 2015, each as updated by subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, all of which are or will be filed with the SEC and incorporated by reference into this joint proxy statement/prospectus. See “Where You Can Find More Information” beginning on page 184 for the location of information incorporated by reference in this joint proxy statement/prospectus.

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THE COMPANIES

DENTSPLY International Inc.

DENTSPLY International Inc., a Delaware corporation which dates its history to 1899, believes it is the world’s largest designer, developer, manufacturer and marketer of a broad range of consumable dental products for the professional dental market. DENTSPLY also manufactures and markets other consumable medical device products. DENTSPLY’s principal product categories are dental consumable products, dental laboratory products, dental specialty products and consumable medical device products.

DENTSPLY conducts its business in the United States, as well as in over 120 foreign countries, principally through its foreign subsidiaries. DENTSPLY has a long-established presence in the European market, particularly in Germany, Sweden, France, the United Kingdom, Switzerland and Italy, as well as in Canada. DENTSPLY also has a significant market presence in the countries of the Commonwealth of Independent States, Central and South America, the Middle-East region and the Pacific Rim.

DENTSPLY’s common stock is traded on the NASDAQ Global Select Market under the symbol “XRAY.”

The principal executive offices of DENTSPLY are located at the Susquehanna Commerce Center, 221 W. Philadelphia Street, York, Pennsylvania 17401, and its telephone number is (717) 845-7511.

Sirona Dental Systems, Inc.

Sirona Dental Systems, Inc., a Delaware corporation, is the leading global manufacturer of high-quality, technologically-advanced dental equipment, and is focused on developing, manufacturing, and marketing innovative solutions for dentists around the world. Sirona is uniquely positioned to benefit from several trends in the global dental industry, such as technological innovation, the shift to digital imaging, favorable demographic trends, and growing patient focus on dental health and cosmetic appearance.

Sirona’s common stock is traded on the NASDAQ Global Select Market under the symbol “SIRO.”

The principal executive offices of Sirona are located at 30-30 47^th Avenue, Suite 500, Long Island City, New York 11101, and its telephone number is (718) 482-2011.

Dawkins Merger Sub Inc.

Dawkins Merger Sub Inc., a wholly owned subsidiary of DENTSPLY, is a Delaware corporation that was formed on September 14, 2015 for the sole purpose of effecting the merger. In the merger, Dawkins Merger Sub Inc. will be merged with and into Sirona, with Sirona surviving as a wholly owned subsidiary of DENTSPLY.

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THE DENTSPLY SPECIAL MEETING

This joint proxy statement/prospectus is being provided to the stockholders of DENTSPLY as part of a solicitation of proxies by DENTSPLY’s board of directors for use at DENTSPLY’s special meeting to be held at the time and place specified below and at any properly convened meeting following any adjournments or postponements thereof. This joint proxy statement/prospectus provides stockholders of DENTSPLY with the information they need to know to be able to vote or instruct their vote to be cast at DENTSPLY’s special meeting.

Date, Time and Place

The special meeting of DENTSPLY stockholders is scheduled to be held at 221 W. Philadelphia St., York, Pennsylvania 17401, on         , 2016, at      , local time, subject to any adjournments or postponements thereof.

Purpose of the DENTSPLY Special Meeting

At the DENTSPLY special meeting, DENTSPLY stockholders will be asked to consider and vote on:

Completion of the merger is conditioned on, among other things, approval of the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and the adoption of DENTSPLY’s amended and restated certificate of incorporation by DENTSPLY stockholders.

Recommendation of the Board of Directors of DENTSPLY

The DENTSPLY board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of DENTSPLY and its stockholders.

The DENTSPLY board of directors unanimously recommends that the DENTSPLY stockholders vote “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger, “FOR” the proposal to approve the Plan and “FOR” the proposal to approve any motion to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation.

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DENTSPLY Record Date; Stockholders Entitled to Vote

Only DENTSPLY stockholders of record at the close of business on December 2, 2015, the DENTSPLY record date for the DENTSPLY special meeting, are entitled to notice of, and to vote at, the DENTSPLY special meeting or any adjournments or postponements thereof.

At the close of business on the DENTSPLY record date, there were 140,035,386 shares of DENTSPLY common stock outstanding and entitled to vote at the DENTSPLY special meeting. DENTSPLY issued and outstanding capital stock consists solely of outstanding shares of DENTSPLY common stock. DENTSPLY stockholders will have one vote for each share of DENTSPLY common stock they owned on the DENTSPLY record date, in person or through the Internet or by telephone or by a properly executed and delivered proxy with respect to the DENTSPLY special meeting. A list of stockholders of DENTSPLY will be available for review for any purpose germane to the special meeting at DENTSPLY’s executive offices and principal place of business at the Susquehanna Commerce Center, 221 W. Philadelphia Street, York, Pennsylvania 17401, during regular business hours for a period of 10 days before the special meeting. The list will also be available at the special meeting for examination by any stockholder of record present at the special meeting.

Voting by DENTSPLY’s Directors and Executive Officers

At the close of business on the DENTSPLY record date, directors and executive officers of DENTSPLY and their affiliates were entitled to vote 4,422,444 shares of DENTSPLY common stock, or      approximately 3.2% of the shares of DENTSPLY common stock outstanding on that date. We currently expect that DENTSPLY’s directors and executive officers will vote their shares in favor of the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, although no director or officer has entered into any agreement obligating him or her to do so.

Quorum

No business may be transacted at the DENTSPLY special meeting unless a quorum is present. Stockholders who hold shares representing at least a majority of the outstanding shares of common stock entitled to vote at the DENTSPLY special meeting must be present in person or represented by proxy to constitute a quorum for the transaction of business at the DENTSPLY special meeting. If a quorum is not present, the special meeting may be adjourned by the vote of a majority of the shares present in person or represented by proxy and entitled to vote at the special meeting to allow additional time for obtaining additional proxies. At any subsequent reconvening of the special meeting, all proxies will be voted in the same manner as they would have been voted at the original convening of the special meeting, except for any proxies that have been effectively revoked or withdrawn prior to the subsequent meeting.

Abstentions (shares of DENTSPLY common stock for which proxies have been received but for which the holders have abstained from voting or as to which the holder attends the special meeting in person but does not vote) will be included in the calculation of the number of shares of DENTSPLY common stock represented at the special meeting for purposes of determining whether a quorum has been achieved. However, broker non-votes will not be included in the calculation of the number of shares of DENTSPLY common stock represented at the special meeting for purposes of determining whether a quorum has been achieved.

Required Vote

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Completion of the merger is conditioned on, among other things, approval of the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and the adoption of DENTSPLY’s amended and restated certificate of incorporation by DENTSPLY stockholders.

Failure to Vote and Abstentions

For purposes of the DENTSPLY special meeting, an abstention occurs when a DENTSPLY stockholder attends the DENTSPLY special meeting, either in person or by proxy, but abstains from voting. Accordingly, with respect to:

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Please see the section entitled “— Shares Held in Street Name” beginning on page 31 for a discussion concerning the effect of broker non-votes on each of the proposals identified above.

Voting of Proxies by Holders of Record

If you are a holder of record, a proxy card is enclosed for your use. DENTSPLY requests that you submit a proxy via Internet by logging onto http://www.proxyvote.com and following the instructions on your proxy card or by telephone by dialing 1-800-690-6903 and listening for further directions or by signing the enclosed proxy and returning it promptly in the enclosed postage-paid envelope. When the enclosed proxy is returned properly executed, the shares of DENTSPLY common stock represented by it will be voted at the DENTSPLY special meeting or any adjournment or postponement thereof in accordance with the instructions contained in the proxy.

If a proxy is returned without an indication as to how the shares of DENTSPLY common stock represented are to be voted with regard to a particular proposal, the DENTSPLY common stock represented by the proxy will be voted in accordance with the recommendation of the DENTSPLY board of directors and, therefore, “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger, “FOR” the proposal to approve the Plan and “FOR” the proposal to approve any motion to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation. At the date hereof, management has no knowledge of any business that will be presented for consideration at the special meeting and which would be required to be set forth in this joint proxy statement/prospectus or the related proxy card other than the matters set forth in DENTSPLY’s Notice of Special Meeting of Stockholders. If any other matter is properly presented at the special meeting for consideration, it is intended that the persons named in the enclosed form of proxy and acting thereunder will vote in accordance with their best judgment on such matter.

Your vote is important. Accordingly, please sign and return the enclosed proxy card whether or not you plan to attend the DENTSPLY special meeting in person. Proxies submitted through the specified Internet website or by phone must be received by 11:59 p.m., eastern time, on         , 2016.

Shares Held in “Street Name”

If you hold your DENTSPLY shares in a stock brokerage account or if your shares are held by a bank, broker, trustee or other nominee (that is, in “street name”), you must provide the record holder of your shares with instructions on how to vote your shares. Please follow the voting instructions provided by your bank, broker, trustee or other nominee. Please note that you may not vote shares held in “street name” by returning a proxy card directly to DENTSPLY or by voting in person at your stockholders meeting unless you have a “legal proxy,” which you must obtain from your bank or broker. Further, brokers who hold shares of DENTSPLY common stock on behalf of their customers may not give a proxy to DENTSPLY to vote those shares without specific instructions from their customers.

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If you are a DENTSPLY stockholder and you do not instruct your broker on how to vote your shares:

Revocation of Proxies

If you are the record holder of DENTSPLY stock, you can change your vote or revoke your proxy at any time before your proxy is voted at the special meeting. You can do this by:

A registered stockholder may revoke a proxy by any of these methods, regardless of the method used to deliver the stockholder’s previous proxy.

Written notices of revocation and other communications with respect to the revocation of proxies should be addressed as follows:

DENTSPLY International Inc.
221 W. Philadelphia Street
York, Pennsylvania 17401
Attention: Secretary

Please note that if your shares are held in “street name” through a broker, bank, employee benefit plan trustee or other nominee, you may change your vote by submitting new voting instructions to your broker, bank or other nominee in accordance with its established procedures. If your shares are held in the name of a broker, bank, employee benefit plan trustee or other nominee and you decide to change your vote by attending the special meeting and voting in person, your vote in person at the special meeting will not be effective unless you have obtained and present an executed proxy issued in your name from the record holder (your broker, bank or other nominee).

Tabulation of Votes

DENTSPLY has appointed to Broadridge Financial Solutions, Inc. serve as the Inspector of Election for the DENTSPLY special meeting. Broadridge will independently tabulate affirmative and negative votes and abstentions.

Solicitation of Proxies

DENTSPLY is soliciting proxies for the DENTSPLY special meeting and, in accordance with the merger agreement, the cost of proxy solicitation will be borne by DENTSPLY. In addition to solicitation by use of

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mails, proxies may be solicited by DENTSPLY directors, officers and employees in person or by telephone or other means of communication. These individuals will not be additionally compensated but may be reimbursed for out-of-pocket expenses associated with solicitation. Arrangements will also be made with brokers, banks, trustees and other nominees for forwarding of proxy solicitation material to beneficial owners of common stock and voting preferred stock held of record and we may reimburse these individuals for their reasonable expenses. To help assure the presence in person or by proxy of the largest number of stockholders possible, DENTSPLY has engaged Innisfree M&A Incorporated (“Innisfree”), a proxy solicitation firm, to solicit proxies on DENTSPLY’s behalf. DENTSPLY has agreed to pay Innisfree a proxy solicitation fee of $25,000, plus reasonable expenses for its services. DENTSPLY will also reimburse Innisfree for its reasonable out-of-pocket costs and expenses.

Adjournments

Any adjournment of the special meeting may be made from time to time by approval of the holders of a majority of the outstanding shares of common stock present in person or represented by proxy at the special meeting, whether or not a quorum exists, without further notice other than by an announcement made at the special meeting. If a quorum is not present at the special meeting, or if a quorum is present at the special meeting but there are not sufficient votes at the time of the special meeting to approve the proposal to issue shares of DENTSPLY common stock to Sirona stockholders or the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, then DENTSPLY stockholders may be asked to vote on the proposal to adjourn the special meeting so as to permit the further solicitation of proxies.

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THE SIRONA SPECIAL MEETING

This joint proxy statement/prospectus is being provided to the stockholders of Sirona as part of a solicitation of proxies by Sirona’s board of directors for use at Sirona’s special meeting to be held at the time and place specified below and at any properly convened meeting following any adjournments or postponements thereof. This joint proxy statement/prospectus provides stockholders of Sirona with the information they need to know to be able to vote or instruct their vote to be cast at Sirona’s special meeting.

Date, Time and Place

The special meeting of Sirona stockholders is scheduled to be held at            on          , 2016 at       , local time, subject to any adjournments or postponements thereof.

Purpose of the Sirona Special Meeting

At the Sirona special meeting, Sirona stockholders will be asked to consider and vote on:

Completion of the merger is conditioned on, among other things, adoption of the merger agreement by Sirona stockholders.

Recommendation of the Board of Directors of Sirona

The Sirona board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of Sirona and its stockholders.

The Sirona board of directors unanimously recommends that Sirona stockholders vote “FOR” the proposal to adopt the merger agreement, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and “FOR” the proposal to adjourn the Sirona special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement.

Sirona Record Date; Stockholders Entitled to Vote

Only holders of record of Sirona common stock at the close of business on December 2, 2015, the record date for Sirona’s special meeting, will be entitled to notice of, and to vote at, Sirona’s special meeting or any adjournments or postponements thereof.

At the close of business on the record date, 55,937,320 shares of Sirona common stock were issued and outstanding and held by 67 holders of record. Sirona issued and outstanding capital stock consists solely of outstanding shares of Sirona common stock. Holders of record of Sirona common stock on the record date are entitled to one vote per share at the special meeting on each proposal. A list of stockholders of Sirona will be available for review for any purpose germane to the special meeting at Sirona’s executive offices and principal place of business at 30-30 47^th Avenue, Suite 500, Long Island City, New York 11101, during regular business hours for a period of 10 days before the special meeting. The list will also be available at the special meeting for examination by any stockholder of record present at the special meeting.

Voting by Sirona’s Directors and Executive Officers

At the close of business on the Sirona record date, directors and executive officers of Sirona and their affiliates were entitled to vote 1,422,701 shares of Sirona common stock, or approximately 2.5% of the shares of Sirona common stock outstanding on that date. We currently expect that Sirona’s directors and executive officers will vote their shares in favor of each proposal being submitted to a vote of the Sirona stockholders at the Sirona special meeting, although no director or officer has entered into any agreement obligating him to do so.

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Quorum

No business may be transacted at the Sirona special meeting unless a quorum is present. Stockholders who hold shares representing at least a majority of the issued and outstanding shares of common stock entitled to vote at the Sirona special meeting must be present in person or represented by proxy to constitute a quorum for the transaction of business at the meeting. If a quorum is not present, the special meeting may be adjourned to allow additional time for obtaining additional proxies. At any subsequent reconvening of the special meeting, all proxies will be voted in the same manner as they would have been voted at the original convening of the special meeting, except for any proxies that have been effectively revoked or withdrawn prior to the subsequent meeting.

Abstentions (shares of Sirona common stock for which proxies have been received but for which the holders have abstained from voting or as to which the holder attends the special meeting in person but does not vote) will be included in the calculation of the number of shares of Sirona common stock represented at the special meeting for purposes of determining whether a quorum has been achieved. However, broker non-votes will not be included in the calculation of the number of shares of Sirona common stock represented at the special meeting for purposes of determining whether a quorum has been achieved.

Required Vote

The adoption of the merger agreement requires the affirmative vote of the holders of a majority of the outstanding shares of Sirona common stock entitled to vote on the proposal. Failures to vote, abstentions and broker non-votes will have the effect of a vote against the proposal.

Approval, on a non-binding advisory basis, of specific compensatory arrangements between Sirona and its named executive officers relating to the merger requires the affirmative vote of holders of a majority of the outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal, although such vote will not be binding on Sirona or its board of directors or any of its committees. Abstentions will have the effect of a vote against the proposal. Failures to vote and broker non-votes will have no effect on the proposal, assuming a quorum is present.

If necessary or appropriate to solicit additional proxies if there are not sufficient votes to approve the adoption of the merger agreement, the Sirona stockholders, by the affirmative vote of holders of a majority of the outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote on the proposal, may adjourn the meeting to another time or place without further notice unless the adjournment is for more than 30 days or if after the adjournment a new record date is fixed for the adjourned meeting, in which case a notice of the adjourned meeting shall be given to each stockholder of record entitled to notice of the meeting.

Completion of the merger is conditioned on, among other things, adoption of the merger agreement by Sirona stockholders.

Failure to Vote, Broker Non-Votes and Abstentions

Under the rules of the NASDAQ, banks, brokers, trusts or other nominees holding shares of record may vote those shares in their discretion on certain routine proposals when they do not receive timely voting instructions from the beneficial holders. A “broker non-vote” occurs under these NASDAQ rules when a bank, broker, trust or other nominee holding shares of record is not permitted to vote on a non-routine matter without instructions from the beneficial owner of the shares and no instruction is given.

In accordance with these NASDAQ rules, banks, brokers and other nominees who hold shares of Sirona common stock in “street name” for their customers, but do not have discretionary authority to vote the shares, may not exercise their voting discretion with respect to the proposal to adopt the merger agreement. Accordingly, if banks, brokers or other nominees do not receive specific voting instructions from the beneficial owner of such shares, they may not vote such shares with respect to the proposal to adopt the merger agreement. For shares of Sirona common stock held in “street name,” only shares of Sirona common stock affirmatively voted “FOR” the proposal to adopt the merger agreement will be counted as a favorable vote for such proposal. Abstaining from voting, or failing to provide voting instructions to your bank, broker or other nominee, will have the same effect as a vote “AGAINST” the proposal to adopt the merger agreement.

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Abstentions will have the effect of a vote “AGAINST” the proposals to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and to adjourn the special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the adoption of the merger agreement. Failures to attend the special meeting (in person or by proxy) and vote and broker non-votes will have no effect on these proposals.

Voting at the Special Meeting

Whether or not you plan to attend Sirona’s special meeting, please vote your shares. If you are a registered or “record” holder, which means your shares are registered in your name with American Stock Transfer & Trust Company, Sirona’s transfer agent and registrar, you may vote in person at the special meeting or by proxy. If your shares are held in “street name,” which means your shares are held of record in an account with a broker, bank or other nominee, you must follow the instructions from your broker, bank or other nominee in order to vote.

In addition, if you are a registered stockholder, please be prepared to provide proper identification, such as a driver’s license. If you hold your Sirona shares in “street name,” you will need to provide proof of ownership, such as a recent account statement or letter from your bank, broker or other nominee, along with proper identification.

Voting in Person

If you plan to attend Sirona’s special meeting and wish to vote in person, you will be given a ballot at the special meeting. Please note, however, that if your shares are held in “street name,” and you wish to vote at the special meeting, you must bring to the special meeting a proxy executed in your favor from the record holder (your broker, bank or other nominee) of the shares authorizing you to vote at the special meeting.

Voting by Proxy

If you are a holder of record, a proxy card is enclosed for your use. Sirona requests that you submit a proxy via Internet by logging onto http://www.proxyvote.com and following the instructions on your proxy card or by telephone by dialing 877-456-7915 and listening for further directions or by signing the accompanying proxy and returning it promptly in the enclosed postage-paid envelope. You should submit your proxy in advance of the meeting even if you plan to attend Sirona’s special meeting. You can always change your vote at the special meeting.

Stockholders of record of Sirona may submit their proxies through the mail by completing their proxy card, and signing, dating and returning it in the enclosed, pre-addressed, postage-paid envelope. To be valid, a returned proxy card must be signed and dated. If you hold your shares of Sirona common stock in “street name”, you will receive instructions from your broker, bank or other nominee that you must follow in order to vote your shares. If you vote by Internet or telephone, you need not return a proxy card by mail, but your vote must be received by 11:59 p.m., eastern time, on          , 2016.

How Proxies are Counted

All shares represented by properly executed proxies received in time for the Sirona special meeting will be voted at the meeting in the manner specified by the stockholders giving those proxies. Properly executed proxies that do not contain voting instructions will be voted “FOR” the proposals.

Only shares affirmatively voted for the proposal, and properly executed proxies that do not contain voting instructions, will be counted as favorable votes for the proposal to adopt the merger agreement. Abstentions and broker non-votes will have the same effect as votes “AGAINST” the proposal to adopt the merger agreement. Abstentions will have the same effect as votes “AGAINST” the proposals to approve, on a non-binding advisory basis, specific compensatory arrangements between Sirona and its named executive officers relating to the merger and to adjourn the Sirona special meeting. Broker non-votes will have no effect on the proposals to approve, on a non-binding advisory basis, the specific compensatory arrangements or to adjourn the Sirona special meeting.

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Revocation of Proxies

If you are the record holder of Sirona stock, you can change your vote or revoke your proxy at any time before your proxy is voted at the special meeting. You can do this by:

A registered stockholder may revoke a proxy by any of these methods, regardless of the method used to deliver the stockholder’s previous proxy.

Written notices of revocation and other communications with respect to the revocation of proxies should be addressed as follows:

Sirona Dental Systems, Inc.
30-30 47^th Avenue, Suite 500
Long Island City, New York 11101
Attention: Secretary

Please note that if your shares are held in “street name” through a broker, bank or other nominee, you may change your vote by submitting new voting instructions to your broker, bank or nominee in accordance with its established procedures. If your shares are held in the name of a broker, bank or other nominee and you decide to change your vote by attending the special meeting and voting in person, your vote in person at the special meeting will not be effective unless you have obtained and present an executed proxy issued in your name from the record holder (your broker, bank or nominee).

Tabulation of Votes

Sirona has appointed IVS Associates, Inc. (“IVS”) to serve as the Inspector of Election for the Sirona special meeting. IVS will independently tabulate affirmative and negative votes and abstentions.

Solicitation of Proxies

Sirona is soliciting proxies for its special meeting from its stockholders. Sirona will pay its own cost of soliciting proxies, including the cost of mailing this joint proxy statement/prospectus, from its stockholders. In addition to solicitation by use of the mails, proxies may be solicited by Sirona’s directors, officers and employees in person or by telephone or other means of communication. These persons will not receive additional compensation, but may be reimbursed for reasonable out-of-pocket expenses in connection with this solicitation.

Sirona has retained the services of Georgeson Inc. to assist in the solicitation of proxies for an estimated fee of $20,000, plus additional variable fees, which have accrued over the course of the solicitation and reimbursement of out-of-pocket expenses. Sirona will make arrangements with brokerage houses, custodians, nominees and fiduciaries to forward proxy solicitation materials to beneficial owners of shares held of record by them. Sirona will also reimburse these brokerage houses, custodians, nominees and fiduciaries for their reasonable expenses incurred in forwarding the proxy materials.

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Adjournments

Any adjournment of the special meeting may be made from time to time by the Sirona stockholders by the affirmative vote of holders of a majority of outstanding shares of Sirona common stock present in person or represented by proxy at the Sirona special meeting and entitled to vote, whether or not a quorum is present, without further notice other than by an announcement made at the special meeting. If a quorum is not present at the special meeting, or if a quorum is present at the special meeting but there are not sufficient votes at the time of the special meeting to approve the proposal to adopt the merger agreement, then Sirona stockholders may be asked to vote on the proposal to adjourn the special meeting so as to permit the further solicitation of proxies. The chairman of the Sirona special meeting shall also have the authority to recess and/or adjourn the Sirona special meeting for any reason.

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THE MERGER

The following is a description of the material aspects of the merger, including the merger agreement. While we believe that the following description covers the material terms of the merger, the description may not contain all of the information that is important to you. We encourage you to read this joint proxy statement/prospectus carefully and in its entirety, including the merger agreement which is included as Annex A to this joint proxy statement/prospectus, for a more complete understanding of the merger.

Effects of the Merger

Upon the terms and subject to the conditions of the merger agreement and in accordance with Delaware law, at the effective time of the merger, Merger Sub, a wholly owned subsidiary of DENTSPLY and a party to the merger agreement, will merge with and into Sirona. Sirona will survive the merger as a wholly owned subsidiary of DENTSPLY. The merger will become effective at such time as a certificate of merger has been duly filed with the Secretary of State of the State of Delaware or at any later date or time mutually agreed to in writing by DENTSPLY and Sirona and specified in the certificate of merger in accordance with Delaware law.

At the effective time of the merger, each outstanding share of Sirona common stock (other than shares held by DENTSPLY, Merger Sub or Sirona, or by Sirona as treasury shares, which will be canceled and retired and cease to exist) will be converted into the right to receive 1.8142 fully paid and nonassessable shares of DENTSPLY common stock, with cash paid in lieu of fractional shares. This exchange ratio is fixed and will not be adjusted to reflect stock price changes prior to the closing of the merger.

DENTSPLY stockholders will not receive any merger consideration and will continue to hold their shares of DENTSPLY common stock after the merger.

DENTSPLY and Sirona are working to complete the merger as soon as practicable and expect the closing of the merger to occur in the first quarter of 2016. However, the merger is subject to various regulatory clearances and the satisfaction or waiver of other conditions, and it is possible that factors outside the control of DENTSPLY and Sirona could result in the merger being completed at an earlier time, at a later time or not at all. There may be a substantial amount of time between the DENTSPLY and Sirona special meetings and the completion of the merger.

Background of the Merger

DENTSPLY’s board of directors and senior management regularly evaluate and assess DENTSPLY’s financial performance, prospects and competitive position, as well as strategies to enhance stockholder value, including opportunities to enhance product offerings, the services it provides to its clients and its overall position in the dental industry. In connection with these reviews and assessments, DENTSPLY’s board of directors and senior management regularly evaluate potential strategic alternatives relating to DENTSPLY and its business, including possible acquisitions, divestitures and business combination transactions. One of the areas for potential growth that DENTSPLY has considered from time to time is a business combination with another dental company to the extent consistent with DENTSPLY’s long-term strategic goals.

Sirona’s board of directors and senior management regularly evaluate and assess Sirona’s financial performance, prospects and competitive position, as well as strategies to enhance stockholder value, including opportunities to enhance product offerings, the services it provides to its clients and its overall position in the dental industry. In connection with these reviews and assessments, Sirona’s board of directors and senior management regularly evaluate potential strategic alternatives relating to Sirona and its business, including possible acquisitions, divestitures and business combination transactions. One of the areas for potential growth that Sirona has considered from time to time is a business combination with another dental company to the extent consistent with Sirona’s long-term strategic goals.

As part of Sirona’s reviews and assessments, Sirona’s board of directors and senior management have had numerous meetings and discussions with strategic parties in the dental industry regarding Sirona and its business, as well as potential transaction opportunities that might be available to advance Sirona’s business and strategic plans, including the proposed merger and other strategic business combination transactions. On various occasions, investment banking firms with experience in the dental industry, including Jefferies, have

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discussed with Sirona’s senior management potential strategic transactions that might be of interest to Sirona, including with respect to a potential business combination with DENTSPLY, as well as other potential strategic partners that we refer to as “Party A,” “Party B,” “Party C” and “Party D.”

In July 2014, Mr. Jeffery T. Slovin, president and chief executive officer of Sirona, and other members of Sirona senior management had various discussions with senior management of Party A regarding the strategic rationale for a potential business combination. In August 2014, the Sirona board of directors instructed senior management of Sirona to engage Latham & Watkins LLP (“Latham”) as its legal counsel and Jefferies as Sirona’s financial advisor, each of which has extensive experience in transactions of this type, in connection with its evaluation of a potential business combination with Party A. Latham and Jefferies were also subsequently engaged to assist Sirona on certain other strategic transactions, including the proposed merger. From August 2014 to October 2014, Sirona senior management, together with representatives of Jefferies and Latham, participated in several meetings and discussions with representatives of Party A regarding the proposed terms of a potential business combination with Party A. During this period, the Sirona board of directors held a number of meetings to receive updates from Sirona’s senior management and legal and financial advisors regarding matters relating to Party A and to discuss the proposed terms of a potential business combination with Party A. In October 2014, Sirona and Party A mutually determined to cease discussions regarding a potential business combination.

In August 2014, financial advisors of Party B made a presentation to senior management of Sirona regarding a potential acquisition of Party B by Sirona. The Sirona board of directors reviewed the potential acquisition with Sirona’s senior management and determined not to pursue the transaction.

In mid-March 2015, each of Mr. Bret W. Wise, chairman and chief executive officer of DENTSPLY, and Mr. Slovin, separately attended the International Dental Show (the “IDS”) in Cologne, Germany. Prior to the IDS, in January 2015, DENTSPLY and Sirona entered into a mutual non-disclosure agreement in order to facilitate discussions regarding possible product collaboration between the two companies. While at the IDS, Messrs. Wise and Slovin had discussions primarily focused on potential product collaboration. During these conversations, however, Messrs. Wise and Slovin also briefly discussed the topic of exploring a potential business combination of the two companies.

Also at the IDS, Mr. Slovin met with Party C to discuss a potential acquisition of Party C by Sirona. Mr. Slovin noted that he had participated in preliminary discussions with members of Party C management over the past several years regarding the strategic rationale for a potential acquisition of Party C by Sirona and discussed preliminary views regarding a potential acquisition.

Following the IDS, Mr. Slovin updated the members of the Sirona board of directors regarding the IDS and his meetings with Mr. Wise and Party C.

Later in March 2015, on two separate occasions, Messrs. Wise and Slovin had telephone conversations, during which they primarily discussed broader product collaboration and noted continued interest in exploratory discussions regarding a potential business combination of the two companies.

On March 25, 2015, the DENTSPLY board of directors held a regularly scheduled meeting. During this meeting, Mr. Wise briefed the DENTSPLY board of directors on his preliminary conversations with Mr. Slovin concerning exploring a potential business combination of the two companies.

In late March 2015 and early April 2015, Mr. Slovin met with the chairman of the Sirona board of directors and updated the other directors of Sirona on his discussions with Mr. Wise regarding a potential business combination between Sirona and DENTSPLY.

During this period, Messrs. Wise and Slovin continued preliminary discussions regarding a potential transaction between Sirona and DENTSPLY.

In April and May 2015, members of Sirona senior management met on various occasions with representatives of Party D to discuss a potential acquisition of Party D by Sirona. Members of the Sirona management team participated in due diligence sessions with Party D, which sessions were attended, at Sirona’s request, by representatives of Jefferies. Sirona also prepared a preliminary indication of interest to propose the terms of a possible acquisition by Sirona of Party D.

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On April 9, 2015, the Sirona board of directors held a special telephonic meeting to discuss with Sirona’s senior management and representatives of Jefferies the potential acquisition by Sirona of Party D. At this meeting, Jefferies reviewed with the Sirona board of directors certain financial matters relating to such potential acquisition. After discussion, the Sirona board of directors authorized Sirona’s senior management to continue discussions with Party D regarding a potential acquisition.

On April 20, 2015, in a telephone conversation between Messrs. Slovin and Wise on the possibility of a broader product collaboration between the two companies, Mr. Slovin indicated that he would continue to discuss the potential business combination transaction with the Sirona board of directors.

On April 23, 2015, Messrs. Wise and Slovin had a further conversation about a potential business combination. No specific terms were discussed. Messrs. Wise and Slovin agreed, subject to the approval of the Sirona board of directors at a board meeting scheduled for April 27, 2015 and April 28, 2015, to meet during the last week of April in the New York office of Skadden, Arps, Slate, Meagher & Flom LLP (“Skadden”), DENTSPLY’s outside legal advisor.

On April 27 and April 28, 2015, the Sirona board of directors held a regularly scheduled meeting in New York City. During this meeting, Mr. Slovin updated the board of directors regarding his discussions with Mr. Wise and the potential business combination of the two companies. Members of Sirona senior management reviewed with the board of directors preliminary financial and business information regarding DENTSPLY and the strategic rationale for a business combination transaction with DENTSPLY. Following this discussion, the Sirona board of directors authorized Mr. Slovin to continue his discussions with Mr. Wise to explore a potential business combination. Mr. Slovin also updated the board of directors on discussions regarding a potential acquisition of Party C or Party D. Following this discussion, the board of directors determined that the acquisition of Party C was unlikely to be a viable option and authorized Sirona management to continue discussions with Party D.

On April 28, 2015, Messrs. Wise and Slovin again engaged in a discussion regarding the possibilities for further collaboration between the two companies and a potential “merger of equals” business combination to be effected at an “at-market” exchange ratio utilizing a valuation period to be determined.

The following morning, on April 29, 2015, Messrs. Wise and Slovin met at the New York office of Skadden. The conversation between Messrs. Wise and Slovin primarily focused on a potential business combination transaction between the two companies. At this meeting, Messrs. Wise and Slovin discussed their respective businesses, various opportunities and challenges facing the dental industry, recent consolidation in the industry and the importance of the emerging complementary nature of consumables and equipment technology within the dental industry. Each of Mr. Wise and Mr. Slovin noted the strategic and complementary fit of the two companies and expressed interest in continuing to explore a potential business combination of the two companies.

In early May 2015, Mr. Slovin met with the chairman of the Sirona board of directors and updated the other directors of Sirona on his discussions with Mr. Wise regarding a potential business combination between Sirona and DENTSPLY. During this time, Mr. Slovin also had discussions with the members of the board of directors regarding a potential acquisition of Party D.

On May 20, 2015, the DENTSPLY board of directors held a regularly scheduled meeting attended by senior management of DENTSPLY and received an overview regarding a possible business combination transaction with Sirona. At the request of the DENTSPLY board of directors, representatives of both Skadden and Moelis, each of which has extensive experience in transactions of this type, were also present for the meeting. Mr. Wise briefed the DENTSPLY board of directors on his meetings and discussions with Mr. Slovin and Sirona’s interest in a potential transaction with DENTSPLY, and discussed the merits and possible risks of a potential transaction with Sirona. Mr. Wise also discussed with the DENTSPLY board of directors possible prospective governance structures for a combined company whereby representatives of both companies would fill management positions and serve on the board of directors of the combined company. DENTSPLY management reviewed with the DENTSPLY board of directors preliminary financial information regarding Sirona based on Sirona’s public filings and other publicly available information regarding Sirona. Representatives of Moelis provided the DENTSPLY board of directors with a description of the process for a

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potential business combination as a “merger of equals” with Sirona. Following this discussion, the DENTSPLY board of directors and representatives of Moelis reviewed the strategic rationale for a potential transaction with Sirona and various preliminary valuation scenarios, taking into consideration possible synergies. The DENTSPLY board of directors discussed a potential business combination with Sirona and its desired process for evaluating any such potential transaction, and directed senior management and Moelis to prepare additional financial information with respect to a potential business combination with Sirona. Also at the meeting, representatives of Moelis confirmed that no conflicts existed in connection with its retention by DENTSPLY to provide services with respect to a potential transaction with Sirona. Representatives of Moelis were then excused from the meeting and the DENTSPLY board of directors discussed and approved the retention of Moelis as financial advisor in connection with the potential transaction. Subsequently, an engagement letter between DENTSPLY and Moelis was entered into and executed on July 15, 2015.

On May 22 and May 29, 2015, Messrs. Wise and Slovin had telephone conversations to discuss the potential business combination of the two companies and to express their continued interest in a possible business combination of the two companies. During these conversations, Messrs. Wise and Slovin discussed operations and governance matters pertaining to a possible combination of the two companies. Mr. Wise communicated to Mr. Slovin the DENTSPLY board of directors’ preliminary interest in considering a potential business combination transaction with Sirona.

In late May 2015, the Sirona senior management team and Party D’s advisors discussed certain key terms on which Sirona would be willing to acquire Party D. Party D’s advisors subsequently requested certain improvements to the key economic terms of the acquisition, which improvements were outside of the range approved by the Sirona board of directors and Sirona management believed were not supported by the financial and other diligence information provided by Party D. Sirona senior management determined that Sirona and Party D were unlikely to reach agreement on the key economic terms for the potential acquisition of Party D and terminated discussions with Party D.

On June 3, 2015, Messrs. Wise and Slovin had a telephone call to further discuss a potential business combination of the two companies. During this conversation, Messrs. Wise and Slovin discussed entering into a confidentiality agreement between DENTSPLY and Sirona to facilitate the companies’ continuing preliminary exploratory discussions and reciprocal due diligence.

Between June 4, 2015 and June 9, 2015, DENTSPLY, Sirona and their respective counsel negotiated the terms of a mutual confidentiality agreement. On June 10, 2015, DENTSPLY and Sirona entered into a mutual confidentiality agreement that included customary standstill and non-solicitation provisions. Following the execution of the confidentiality agreement, Messrs. Wise and Slovin held telephone conversations to discuss a potential timeline and logistical matters for conducting preliminary due diligence meetings and discussions.

On June 30 and July 1, 2015, representatives of DENTSPLY management and Sirona management held meetings in New York City to share additional information regarding their respective businesses and to continue to explore the strategic and operational rationale for a combination of the two companies. Representatives of DENTSPLY’s and Sirona’s respective financial advisors also attended these meetings. During these meetings, members of DENTSPLY’s management and Sirona’s management presented information concerning their respective internal management structure, business strategy, product portfolio, product pipeline, financial information and financial guidance. Preliminary discussions were also held regarding potential synergies that might result from the combination of the two companies.

Following the meetings in New York City, Mr. Slovin updated the members of the Sirona board of directors on the due diligence process and other discussions between Sirona and DENTSPLY regarding the potential business combination.

Following the meetings in New York City, representatives of DENTSPLY and Sirona engaged in discussions on multiple occasions concerning due diligence matters, potential transaction structures, treatment of existing debt, potential synergies and governance matters, along with the anticipated timing of entering into a merger agreement.

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On July 28, 2015, Messrs. Wise and Slovin had a telephone conversation to confirm that no additional information was needed from one another prior to the respective meetings of the boards of directors of DENTSPLY and Sirona.

On July 28 and July 29, 2015, the DENTSPLY board of directors held a regularly scheduled meeting, during which they discussed the status of the potential transaction. Representatives of each of Moelis and Skadden also participated in certain portions of the meeting. DENTSPLY management provided the board of directors with an overview of the potential transaction, including strategic implications for DENTSPLY, anticipated synergies, valuation matters, DENTSPLY’s assessment of the financial implications of the potential transaction and the potential governance structure of the combined company. The board of directors authorized Mr. Wise to propose a six-to-five member split of the board of directors of the combined company with six members designated by DENTSPLY and five members designated by Sirona, with the initial designees of each party to be determined between signing of the merger agreement and closing of the merger; the potential roles of a chief executive officer of the combined company and an executive chairman of the combined company described below; York, Pennsylvania as the global headquarters of the combined company and one of Sirona’s European offices as the international headquarters of the combined company. Mr. Wise proposed, and the DENTSPLY board of directors agreed to, an approach whereby Mr. Slovin would serve as the chief executive officer and Mr. Wise would serve as the executive chairman of the combined company (including the scope of responsibilities of the executive chairman). In this regard, the DENTSPLY board of directors asked Mr. Wise to arrange an opportunity for the DENTSPLY directors to meet with Mr. Slovin and discuss with him his views on the operations of a combined company. Representatives of Moelis reviewed preliminary financial information regarding DENTSPLY and Sirona and discussed valuation methodologies with the board of directors. At the end of the meeting, the DENTSPLY board of directors authorized DENTSPLY management to continue to engage and negotiate with Sirona, and specifically to continue discussions with Sirona on the proposals regarding governance and other matters as discussed at the meeting.

On July 30, 2015, Mr. Wise and Mr. Slovin spoke by telephone to discuss the potential proportionate post-closing ownership of the combined company, the anticipated synergies, the complementary products and services of the two companies, the location of the global headquarters and the international headquarters of the combined company, the potential roles of the chief executive officer of the combined company and the executive chairman of the combined company, other senior positions in the combined company and options to fill them, the structure of the potential business combination, and the composition of the board of directors of the combined company. During this conversation, Mr. Wise presented for the first time to Mr. Slovin a governance structure whereby Mr. Slovin would serve as chief executive officer and Mr. Wise would serve as executive chairman of the combined company with specified roles and responsibilities to be mutually agreed upon by the parties, and conveyed to Mr. Slovin the request of the DENTSPLY board of directors to meet with Mr. Slovin and discuss with him his views on the operations of a combined company.

On July 31, 2015, the Sirona board of directors held a special telephonic meeting at which Mr. Slovin provided an update on his discussions with Mr. Wise, and the Sirona board of directors and Sirona senior management discussed the proposals made by Mr. Wise on behalf of the DENTSPLY board of directors, including the proposals on the governance structure of the combined company and that Messrs. Wise and Slovin would serve as executive chairman and chief executive officer of the combined company, respectively. The Sirona board of directors determined to devote a significant portion of the next regularly scheduled board meeting to discuss the potential business combination with DENTSPLY in further detail.

On August 3 and August 4, 2015, the Sirona board of directors held a regularly scheduled meeting in New York City. Representatives of each of Latham and Jefferies also participated in the meeting. At this meeting, Mr. Slovin and Sirona senior management reviewed with the Sirona board of directors the strategic rationale for a potential transaction with DENTSPLY and provided an update regarding the due diligence efforts that had been completed to date and the discussions with DENTSPLY senior management, including the potential post-closing ownership of the combined company that would be determined generally utilizing an “at-market” valuation and exchange ratio based on a negotiated valuation period, the anticipated synergies, the complementary products and services of the two companies, the location of the global headquarters and the international headquarters of the combined company, the potential roles of the chief executive officer of the combined company and the executive chairman of the combined company, other senior positions in the

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combined company and options to fill them, the structure of the potential business combination, and the composition of the board of directors of the combined company. Jefferies reviewed with the Sirona board of directors certain preliminary financial perspectives relating to DENTSPLY and the proposed transaction. Representatives of Latham reviewed with the Sirona board of directors its fiduciary duties when considering the proposed transaction. The Sirona board of directors determined that Sirona senior management, together with Sirona’s legal and financial advisors, should continue discussions and negotiations with DENTSPLY and provided guidance with respect to such negotiations, including with respect to proposals regarding Mr. Slovin serving as the chief executive officer of the combined company and the proposed post-closing ownership split of approximately 58/42, and that Sirona should propose that Sirona’s designees be appointed to, and serve specific roles on, the committees of the board of directors of the combined company, that Sirona would have the right to appoint the lead director, and that certain supermajority approval protections would be implemented for a period of at least three years following the closing of the potential transaction with respect to certain governance features of the combined company.

On August 5, 2015, Messrs. Wise and Slovin met in New York City to discuss governance and commercial aspects of the potential business combination. During such meeting, Mr. Slovin provided Mr. Wise with an update on the response from Sirona’s board of directors regarding the potential business combination of the two companies, including that if Sirona accepted a six-to-five member board split, Sirona would require certain prescribed roles for the Sirona directors on the committees of the board of directors of the combined company, that Sirona would have the right to appoint the lead director, and certain supermajority approval protections would be implemented for a period of at least three years following the closing of the potential transaction with respect to certain governance features of the combined company.

On August 7, 2015, the DENTSPLY board of directors commenced holding weekly update calls concerning the potential transaction. Mr. Wise provided an overview of Sirona’s most recent earnings announcement and financial performance. Mr. Wise then provided an updated overview of his discussion with Mr. Slovin regarding key aspects of the proposed business combination transaction with Sirona, including the proposed post-closing ownership of the combined company, company leadership and governance of the combined company.

During telephone conversations on August 7 and August 9, 2015, Messrs. Wise and Slovin continued to discuss the structure of the potential transaction, as well as the roles of chief executive officer and executive chairman of the combined company, and governance features.

On August 10, 2015, Latham distributed a draft merger agreement to Skadden. Over the next several weeks, DENTSPLY, Sirona and each company’s respective representatives conducted further due diligence review of each other’s businesses, which included review of materials made available in electronic datarooms created by each company.

On August 11, 2015, in accordance with the DENTSPLY board of directors’ request, Mr. Wise introduced Mr. Slovin to six of DENTSPLY’s independent directors in person at a meeting in New York City and one DENTSPLY director who participated in the introductory meeting via telephone. Following the introductory meeting, Messrs. Wise and Slovin, along with the DENTSPLY directors present, attended a dinner in New York City. Mr. Slovin discussed with the DENTSPLY directors his views on the operations of a combined company.

Following this meeting, Mr. Slovin updated the members of the Sirona board of directors on the meeting with the DENTSPLY directors and the due diligence process, and the directors provided guidance to Mr. Slovin regarding the ongoing negotiations.

From August 10, 2015 to September 15, 2015, DENTSPLY’s and Sirona’s respective managements and advisors engaged in further due diligence. During this period, the parties exchanged multiple drafts of the merger agreement and negotiated the terms and conditions of the merger agreement including, in particular, the structure of the transaction, the corporate governance structure of the combined company, the conditions to the consummation of the merger, the circumstances in which DENTSPLY and Sirona could consider unsolicited acquisition proposals made by third parties as well as the terms upon which DENTSPLY and Sirona might be required to pay a fee upon termination of the merger agreement and the amount of any such

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termination fee, the commitments to achieve satisfaction of conditions to closing, the remedies available to either party in the event of termination or breach of the merger agreement, the definition of material adverse effect, and qualifications to representations and warranties. Furthermore, in connection with the proposed business combination of the two companies, representatives of DENTSPLY and Skadden and representatives of Sirona and Latham exchanged drafts of and negotiated specific changes to the DENTSPLY amended and restated certificate of incorporation, the by-laws of DENTSPLY and DENTSPLY’s corporate governance guidelines/policies, setting forth the post-closing governance structure and features of the combined company.

On August 19 and August 20, 2015, several representatives of DENTSPLY and Sirona met in New York City to engage in further due diligence. Representatives of DENTSPLY’s and Sirona’s respective financial advisors also attended these meetings. During these meetings, each party provided additional information concerning their respective companies’ internal management structure, business strategy, product portfolio, product pipeline, financial information and financial guidance.

On August 20 and August 21, 2015, Messrs. Wise and Slovin met in New York City to discuss the preliminary results of the due diligence meetings previously held by DENTSPLY management and Sirona management. The parties also discussed the potential corporate structure of the proposed business combination of the two companies and certain key issues in the most recent draft of the merger agreement concerning alternative structures regarding the surviving company, governance features relating to the survival period for the post-closing board supermajority approval requirements, board committee composition, and combined company leadership and governance.

On August 21, 2015, the Sirona board of directors held a telephonic meeting to receive an update from Sirona’s management and legal and financial advisors on the status of discussions with DENTSPLY and its advisors regarding a potential business combination. The Sirona board of directors discussed the preliminary results of the due diligence process, the strategic rationale for the proposed transaction, potential synergies, Mr. Slovin’s meeting with the DENTSPLY directors, and key transaction terms under discussion between the parties, including the roles and responsibilities for the chief executive officer and executive chairman of the board for the combined company, the lead director position, committee composition and other corporate governance features of the combined company. The Sirona board of directors also discussed the status of the draft definitive documents that had been exchanged between the parties and open issues. The Sirona board of directors also requested that Mr. Slovin arrange a meeting among Mr. Wise and certain of the Sirona directors to discuss Mr. Wise’s views on the operations, strategy and governance of the combined company. The Sirona board of directors also determined to meet on at least a weekly basis to discuss the potential business combination.

On each of August 28, September 1 and September 5, 2015, the Sirona board of directors held telephonic meetings to receive an update on the potential business combination from Sirona senior management, Latham and Jefferies. At each of these meetings, the Sirona board of directors discussed the updated results of the due diligence process, the status of the draft definitive documents that had been exchanged between the parties and certain open issues, including termination rights, payment of a termination fee, regulatory approvals, the potential corporate structure of the proposed combination of the two companies and the proposed corporate governance structure of the combined company, the status of the discussions regarding the respective roles and responsibilities of the chief executive officer and the executive chairman of the board of the combined company and the potential impact of alternative proposed transaction structures. The Sirona board of directors also began discussions regarding a process through which the respective compensation committees of the boards of directors of Sirona and DENTSPLY would cooperatively develop compensation principles and arrangements for senior management of the combined company. The Sirona board of directors determined that the Sirona compensation committee should work with Sirona’s outside compensation consultant to develop with DENTSPLY and its compensation committee certain compensation principles and the process by which the parties would establish the compensation arrangements for senior management of the combined company prior to closing.

Messrs. Wise and Slovin spoke by telephone several times between the last week of August 2015 through the second week of September 2015. During these conversations, the parties discussed at-length the potential corporate structure of the proposed combination of the two companies, the respective roles of the chief

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executive officer and the executive chairman and options to fill other senior positions in the combined company. Also during this time, the respective managements of DENTSPLY and Sirona discussed certain open transaction issues in the most recent drafts of the merger agreement and relating to the potential business combination, including termination rights, payment of a termination fee, regulatory approvals, the potential corporate structure of the proposed combination of the two companies, the proposed corporate governance structure of the combined company and the post-closing transition period during which any changes to the agreed upon corporate governance structure would be subject to supermajority approval requirements and which actions would be subject to the foregoing.

Also during this period, the DENTSPLY compensation consultant conferred with the Sirona compensation consultant in an effort to develop principles with respect to the compensation of the chief executive officer and the executive chairman of the combined company. Throughout early September, the DENTSPLY compensation committee reviewed materials prepared by the DENTSPLY compensation consultant and the Sirona compensation committee reviewed materials prepared by the Sirona compensation consultant. On September 9, 2015, Latham conveyed to Skadden that the chairman of the Sirona compensation committee proposed that (i) the respective compensation consultants jointly advise the Sirona and DENTSPLY compensation committees of their respective proposed compensation peer groups, (ii) the Sirona and DENTSPLY compensation committees agree on target compensation ranges for the chief executive officer and executive chairman positions, (iii) the Sirona and DENTSPLY compensation committees enter into a letter agreement (the “Compensation Principles”) establishing such agreed terms and the process for developing them more fully after execution of the merger agreement and (iv) Sirona and Mr. Slovin enter into an amendment to Mr. Slovin’s existing employment agreement to allow him to terminate his employment for “good reason” following consummation of the merger only in limited circumstances in which his new employment agreement with the combined company did not provide certain benefits. In addition, the chairman of the Sirona compensation committee further proposed a process through which, after execution of the merger agreement, representatives of the Sirona and DENTSPLY compensation committees would finalize the definitive terms of employment of the chief executive officer and the executive chairman of the combined company.

On September 8, 2015, the Sirona board of directors held a telephonic meeting to receive an update on the potential business combination from Sirona senior management, Latham and Jefferies. During this meeting, the Sirona board of directors discussed the updated results of the due diligence process, the status of the draft definitive documents that had been exchanged between the parties and certain open issues, including the proposed legal structure of the transaction and the corporate governance structure of the combined company, including the respective roles of the chief executive officer and the executive chairman. The Sirona board of directors also discussed with Jefferies preliminary perspectives regarding the potential exchange ratio that would be utilized to generally reflect an “at-market” valuation of the parties. The chairman of the Sirona compensation committee and Sirona’s compensation consultant also provided an update to the board regarding the compensation committee’s discussions with the compensation consultant and other advisors, including Latham, and with the DENTSPLY compensation committee regarding the employment arrangements for senior management of the combined company.

On September 8, 2015, the DENTSPLY board of directors held a special telephonic meeting. DENTSPLY’s management and representatives of each of Moelis and Skadden provided the DENTSPLY board of directors information on the status of the proposed transaction, including an update on due diligence and the status of the merger agreement negotiations. During the meeting, the DENTSPLY board of directors reviewed and discussed with DENTSPLY’s management and representatives of Skadden certain key issues raised in the most recent draft of the merger agreement, the corporate structure of the proposed transaction with Sirona, the governance features of the combined company, including the potential role of the executive chairman of the combined company, the compensation process for certain senior management of the combined company, the exchange ratio and termination rights in connection with the merger agreement. During an executive session, the DENTSPLY board of directors further discussed the potential compensation of the chief executive officer and executive chairman of the combined company.

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On September 10, 2015, Messrs. Wise and Slovin and certain members of the Sirona board of directors, including the non-executive chairman of the Sirona board of directors, met in New York City to discuss Mr. Wise’s views regarding the potential business combination and the post-closing strategy, operations and governance of the combined company.

Over the next few days, representatives of DENTSPLY management and Sirona management and their respective legal advisors had a number of conference calls to resolve the remaining outstanding issues in the merger agreement and related transaction documents. In addition, during this period, members of the compensation committees of both companies, together with their respective compensation consultants, held conversations pertaining to the Compensation Principles and the process through which, after execution of the merger agreement, representatives of the Sirona and DENTSPLY compensation committees would finalize the definitive terms of employment of the chief executive officer and the executive chairman of the combined company.

On September 10 and 11, 2015, the Sirona board of directors held a meeting with Sirona senior management, Latham and Jefferies in New York City. In advance of the meeting, the Sirona board of directors was provided with, among other things, a near-final draft of the merger agreement and other transaction-related materials. At this meeting, senior management reviewed with the Sirona board of directors the results of the business, financial, accounting and legal due diligence review of DENTSPLY and provided a detailed overview of DENTSPLY’s business and the strategic rationale for the proposed transaction. Representatives of Latham reviewed with the Sirona board of directors its fiduciary duties when considering the proposed transaction and provided a detailed summary of the transaction documents, including the terms and conditions of the merger agreement, and the proposed corporate governance of the combined company, and Jefferies reviewed with the Sirona board of directors certain preliminary financial aspects of the proposed transaction. The chairman of the Sirona compensation committee also provided an update regarding the discussions with the DENTSPLY compensation committee, the Compensation Principles and the process through which, after execution of the merger agreement, representatives of the Sirona and DENTSPLY compensation committees would finalize the definitive terms of employment of the chief executive officer and the executive chairman of the combined company. The Sirona board of directors provided guidance regarding the remaining open issues, including, among other things, the final exchange ratio, the legal structure of the transaction, scope of the parties’ obligations with respect to obtaining regulatory approvals and certain termination provisions.

On September 11, 2015, the DENTSPLY board of directors held a special meeting in Baltimore, Maryland. Members of management and representatives of each of Moelis and Skadden also participated in the meeting. In advance of the meeting, the directors were provided with, among other things, a near-final draft of the merger agreement. Mr. Wise reported that the parties were close to an agreement on significant deal points. The chairman of the DENTSPLY compensation committee informed the board of directors that the parties had agreed to establish a process by which, between the execution date of the merger agreement and the completion of the transaction, representatives of DENTSPLY and Sirona would meet to establish definitive terms of the new compensation arrangements and employment agreements for the chief executive officer and the executive chairman of the combined company. DENTSPLY management reviewed with the DENTSPLY board of directors the expected synergies, proposed capital structure for the combined company, certain terms of the merger agreement, and findings from the due diligence investigation. Representatives of Moelis reviewed with the DENTSPLY board of directors financial aspects of the proposed transaction with Sirona. A representative of DENTSPLY reviewed with the DENTSPLY board of directors certain employee benefits matters in connection with the proposed transaction with Sirona. In addition, representatives of Skadden also provided to the DENTSPLY board of directors a detailed summary of the material terms and conditions of the draft merger agreement, including the scope of the parties’ obligations with respect to obtaining regulatory approvals, and the material terms of the corporate governance documents of the combined company that would become effective upon consummation of the proposed transaction. Mr. Wise then reviewed with the DENTSPLY board of directors certain key issues upon which DENTSPLY and Sirona had agreed, including an estimated range of the exchange ratio based on a 20 and 30-day VWAP, deal structure, “no-shop” provisions and other deal terms, board structure and closing conditions.

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On September 12, 2015, the respective chairmen of the DENTSPLY compensation committee and the Sirona compensation committee had a telephone conversation to discuss the Compensation Principles, including the methodology for determining the compensation of the chief executive officer of the combined company and the executive chairman of the combined company. It was agreed that the chairmen of the compensation committees of DENTSPLY and Sirona would memorialize the process by which, between the execution of the merger agreement and the completion of the transaction, representatives of DENTSPLY and Sirona would meet to establish definitive terms of the new compensation arrangements and employment agreements for the chief executive officer and the executive chairman of the combined company.

On September 13, 2015, the DENTSPLY board of directors held a telephonic meeting. Representatives of Moelis and Skadden participated in the meeting. Such representatives together provided the DENTSPLY board of directors with an update on the merger agreement and the status of the remaining open matters, including the final transaction structure, designation of certain additional senior management positions of the combined company, and termination and reimbursement fees.

On September 13, 2015, a telephone conversation occurred between Messrs. Wise and Slovin. During this conversation, Messrs. Wise and Slovin discussed the final terms of the merger agreement, including an exchange ratio of 1.8142, and reviewed the planned communication strategy concerning the initial public announcement of the proposed transaction. Messrs. Wise and Slovin agreed to meet the next day in Las Vegas, Nevada at the CEREC30 event. On September 14, 2015, Messrs. Wise and Slovin met in Las Vegas, Nevada and discussed the initial public announcement of the proposed transaction.

On September 15, 2015, the DENTSPLY board of directors held a special telephonic meeting with DENTSPLY’s senior management and representatives of each of Skadden and Moelis participating via telephone for certain portions of the meeting. All of the directors were present by telephone. Before the DENTSPLY board of directors convened, the directors received various materials relating to their review of the proposed transaction, including a copy of the final draft of the merger agreement, draft proposed resolutions approving the transaction and a presentation by representatives of Moelis. Representatives of Skadden reviewed the changes that had been made to the draft merger agreement since the draft that had been distributed to the DENTSPLY board of directors in advance of the September 11, 2015 meeting. Following the presentation by the representatives of Skadden, a representative of DENTSPLY provided an update to the DENTSPLY board of directors on certain human resources and employee benefits issues. Also at this meeting, representatives of Moelis reviewed with the DENTSPLY board of directors Moelis’ financial analysis of the exchange ratio and delivered to the board an oral opinion, which was confirmed by delivery of a written opinion, dated September 15, 2015, addressed to DENTSPLY’s board of directors to the effect that, as of the date of the opinion and based upon and subject to the conditions and limitations set forth in the opinion, the exchange ratio in the merger was fair from a financial point of view to DENTSPLY. The full text of the written opinion of Moelis, which sets forth the assumptions and limitations, matters considered and procedures followed with respect to its opinion, is attached to this joint proxy statement/prospectus as Annex B. A discussion ensued regarding the proposed transaction with Sirona. In the course of its deliberations, the DENTSPLY board of directors considered a number of factors, including those described more fully below under “— DENTSPLY’s Reasons for the Merger; Recommendation of the DENTSPLY Board of Directors.” Following these presentations and discussions, an executive session of the DENTSPLY board of directors occurred to discuss further the proposed transaction with Sirona. After the executive session, the other meeting participants rejoined the meeting and a representative of Skadden reviewed resolutions approving the merger, the merger agreement and the related matters with the DENTSPLY board of directors. The DENTSPLY board of directors unanimously determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of DENTSPLY and its stockholders and authorized the appropriate officers of DENTSPLY to execute and deliver the merger agreement and related documents. In addition, the DENTSPLY board of directors authorized the definitive memorialization of the process established by the chairmen of the compensation committees of DENTSPLY and Sirona pursuant to which between the execution of the merger agreement and the consummation of the transaction representatives of DENTSPLY and representatives of Sirona would meet to establish definitive terms of the new compensation arrangements and employment agreements for the chief executive officer and the executive chairman of the combined company.

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On September 15, 2015, the compensation committee of the Sirona board of directors held a telephonic meeting with Latham and Sirona’s compensation consultant to review and approve the final Compensation Principles and the proposed amendment to Mr. Slovin’s existing employment agreement to allow him to terminate his employment for “good reason” following consummation of the merger only in limited circumstances in which his new employment agreement with the combined company did not provide certain benefits. Following the discussion, the compensation committee resolved to recommend to the Sirona board of directors the approval of the Compensation Principles and the proposed amendment.

Also on September 15, 2015 the Sirona board of directors held a telephonic meeting with senior management, Jefferies, Latham and Sirona’s compensation consultant. All of the directors were present by telephone. In advance of the meeting, the directors were provided with, among other things, final versions of the merger agreement, including a marked version showing all of the changes to the draft that was distributed to the board at the September 11, 2015 meeting, and the other definitive documents, including the Compensation Principles and the proposed amendment to Mr. Slovin’s employment agreement, draft proposed resolutions approving the transaction and materials prepared by Jefferies. The chairman of the Sirona compensation committee and Sirona’s compensation consultant reviewed the final Compensation Principles and the proposed amendment to Mr. Slovin’s employment agreement and discussed with the Sirona board of directors the recommendation of the compensation committee that the board of directors approve the Compensation Principles and such proposed amendment. Representatives of Latham reviewed the changes to the merger agreement compared to the draft distributed to the board in advance of the September 11, 2015 meeting and the other final transaction documents. At this meeting, Jefferies reviewed with the Sirona board of directors its financial analysis of the exchange ratio and rendered an oral opinion, confirmed by delivery of a written opinion dated September 15, 2015, to the Sirona board of directors to the effect that, as of such date and based on and subject to various assumptions made, procedures followed, matters considered and limitations and qualifications on the review undertaken, the exchange ratio provided for in the merger agreement was fair, from a financial point of view, to holders of Sirona common stock. A discussion ensued regarding the proposed transaction with DENTSPLY. In the course of its deliberations, the Sirona board of directors considered a number of factors, including those described more fully below under “— Sirona’s Reasons for the Merger; Recommendation of the Sirona Board of Directors.” Following these discussions, representatives of Latham reviewed resolutions approving the merger, the merger agreement, the Compensation Principles, the amendment to Mr. Slovin’s employment agreement, and the related matters that had been previously distributed to the Sirona board of directors. The Sirona board of directors unanimously determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of Sirona and its stockholders and authorized the appropriate officers of Sirona to execute and deliver the merger agreement, the Compensation Principles, the amendment to Mr. Slovin’s employment agreement and related documents.

On September 15, 2015, following the approvals of the DENTSPLY board of directors and the Sirona board of directors, DENTSPLY and Sirona executed the merger agreement. DENTSPLY and Sirona then issued a joint press release announcing the execution of the merger agreement.

DENTSPLY’s Reasons for the Merger; Recommendation of the DENTSPLY Board of Directors

In reaching its decision to approve the merger agreement and recommend approval of the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger and the adoption of DENTSPLY’s amended and restated certificate of incorporation, the DENTSPLY board of directors consulted with DENTSPLY’s management, as well as with DENTSPLY’s legal and financial advisors, and also considered a number of factors that the DENTSPLY board of directors viewed as supporting its decisions, including, but not limited to, the following:

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In addition to considering the factors described above, the DENTSPLY board of directors also considered the following factors:

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The DENTSPLY board of directors weighed the foregoing against a number of risks and potentially negative factors, including:

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In view of the wide variety of factors considered in connection with its evaluation of the merger and the complexity of these matters, the DENTSPLY board of directors did not find it useful and did not attempt to assign any relative or specific weights to the various factors that it considered in reaching its determination to approve the merger and the merger agreement and to recommend that DENTSPLY stockholders vote “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger and “FOR” the proposal to approve any motion to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation. In addition, although the DENTSPLY board of directors did not find it useful and did not attempt to assign any relative or specific weights to the various factors, individual members of the DENTSPLY board of directors may have assigned different weights to different factors. The DENTSPLY board of directors conducted an overall analysis of the factors described above, including through discussions with, and questioning of, DENTSPLY’s management and outside legal and financial advisors.

The DENTSPLY board of directors has unanimously approved the merger agreement and determined that the merger agreement and the transactions contemplated thereby, including the merger, are advisable, fair to and in the best interests of DENTSPLY and its stockholders. The DENTSPLY board of directors unanimously recommends that DENTSPLY stockholders vote “FOR” the proposal to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger, “FOR” the proposal to adopt DENTSPLY’s amended and restated certificate of incorporation, “FOR” the proposal to approve, on a non-binding advisory basis, specific compensatory arrangements between DENTSPLY and its named executive officers relating to the merger, “FOR” the proposal to approve the Plan and “FOR” the proposal to approve any motion to adjourn the DENTSPLY special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to approve the issuance of shares of DENTSPLY common stock to Sirona stockholders pursuant to the merger or the adoption of DENTSPLY’s amended and restated certificate of incorporation.

Opinion of DENTSPLY’s Financial Advisor

Opinion of Moelis & Company LLC

At the meeting of DENTSPLY’s board of directors on September 15, 2015 to evaluate and approve the merger, Moelis delivered an oral opinion, which was confirmed by delivery of a written opinion, dated September 15, 2015, addressed to DENTSPLY’s board of directors to the effect that, as of the date of the opinion and based upon and subject to the conditions and limitations set forth in the opinion, the exchange ratio in the merger was fair from a financial point of view to DENTSPLY.

The full text of Moelis’ written opinion dated September 15, 2015, which sets forth the assumptions made, procedures followed, matters considered and limitations on the review undertaken in connection with the opinion, is included as Annex B to this joint proxy statement/prospectus and is incorporated herein by reference. Stockholders are urged to read Moelis’ written opinion carefully and in its entirety. Moelis’ opinion was provided for the use and benefit of DENTSPLY’s board of directors (in its capacity as such) in its evaluation of the merger. Moelis’ opinion is limited solely to the fairness to DENTSPLY,

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from a financial point of view, of the exchange ratio and does not address DENTSPLY’s underlying business decision to effect the merger or the relative merits of the merger as compared to any alternative business strategies or transactions that might be available with respect to DENTSPLY. Moelis’ opinion does not constitute a recommendation to any DENTSPLY stockholder as to how such stockholder should vote or act with respect to the merger or any other matter. Moelis’ opinion was approved by a Moelis fairness opinion committee.

In arriving at its opinion, Moelis, among other things:

In connection with its review, Moelis did not assume any responsibility for independent verification of any of the information supplied to, discussed with or reviewed by Moelis for the purpose of its opinion and, with the consent of the DENTSPLY board of directors, Moelis relied on such information being complete and accurate in all material respects. In addition, with the consent of the DENTSPLY board of directors, Moelis did not make any independent evaluation or appraisal of any of the assets or liabilities (contingent, derivative, off-balance-sheet, or otherwise) of DENTSPLY or Sirona, nor was Moelis furnished with any such evaluation or appraisal. With respect to the financial forecasts relating to DENTSPLY and Sirona, Expected Synergies and other pro forma financial effects referred to above, Moelis assumed, at the direction of the DENTSPLY board of directors, that such information was reasonably prepared on a basis reflecting the best currently available estimates and judgments of the management of DENTSPLY, and, in the case of the Expected Synergies, of DENTSPLY and Sirona, as to the future performance of DENTSPLY and Sirona, such Expected Synergies (including the amount, timing and achievability thereof) and such other pro forma financial effects. Moelis also assumed, at the direction of the DENTSPLY board of directors, that the future financial results (including Expected Synergies) reflected in such forecasts and other information would be achieved at the times and in the amounts projected. In addition, at the direction of the DENTSPLY board of directors, Moelis relied on the assessments of managements of DENTSPLY and Sirona as to the integration of their respective businesses.

Moelis’ opinion did not address DENTSPLY’s underlying business decision to effect the merger or the relative merits of the merger as compared to any alternative business strategies or transactions that might be available with respect to DENTSPLY and did not constitute a recommendation to any stockholder of

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DENTSPLY as to how such stockholder should vote or act with respect to the merger or any other matter. At the direction of the DENTSPLY board of directors, Moelis was not asked to, and Moelis did not, offer any opinion as to any terms of the merger agreement or any aspect or implication of the merger, except for the exchange ratio to the extent expressly specified in Moelis’ opinion. Moelis’ opinion relates to the relative values of DENTSPLY and Sirona. With the consent of the DENTSPLY board of directors, Moelis expressed no opinion as to what the value of DENTSPLY common stock actually will be when issued pursuant to the merger or the prices at which DENTSPLY common stock or Sirona common stock may trade at any time. Moelis is not a tax, legal, regulatory or accounting expert and Moelis assumed and relied upon, without independent verification, the assessments of DENTSPLY and DENTSPLY’s other advisors with respect to tax, legal, regulatory and accounting matters. In rendering its opinion, Moelis assumed, with the consent of the DENTSPLY board of directors, that the final executed form of the merger agreement would not differ in any material respect from the draft that Moelis reviewed, that the merger would be consummated in accordance with its terms and that the parties to the merger agreement would comply with all the material terms of the merger agreement. Moelis also assumed, with the consent of the DENTSPLY board of directors, that all governmental, regulatory or other consents and approvals necessary for the consummation of the merger would be obtained without the imposition of any delay, limitation, restriction, divestiture or condition that would have an adverse effect on DENTSPLY, Sirona or the merger. In addition, representatives of DENTSPLY advised Moelis, and Moelis assumed, with the consent of the DENTSPLY board of directors, that the merger would qualify as a reorganization for federal income tax purposes.

Moelis’ opinion was necessarily based on economic, monetary, market and other conditions as in effect on, and the information made available to Moelis as of, the date of its opinion.

Moelis’ opinion was for the use and benefit of the DENTSPLY board of directors (in its capacity as such) in its evaluation of the merger and, except as expressly set forth in Moelis’ engagement letter with DENTSPLY regarding the merger, may not be disclosed without Moelis’ prior written consent. Moelis’ opinion did not address the fairness of the merger or any aspect or implication thereof to, or any other consideration of or relating to, the holders of any class of securities, creditors or other constituencies of DENTSPLY, other than the fairness of the exchange ratio from a financial point of view to DENTSPLY. In addition, Moelis did not express any opinion as to the fairness of the amount or nature of any compensation to be received by any officers, directors or employees of any parties to the merger, or any class of such persons, relative to the exchange ratio or otherwise. Moelis’ opinion was approved by a Moelis fairness opinion committee.

The following is a summary of the material financial analyses presented by Moelis to the board of directors of DENTSPLY at its meeting held on September 15, 2015, in connection with its opinion.

Some of the summaries of financial analyses below include information presented in tabular format. In order to fully understand Moelis’ analyses, the tables must be read together with the text of each summary. The tables alone do not constitute a complete description of the analyses. Considering the data described below without considering the full narrative description of the financial analyses, including the methodologies and assumptions underlying the analyses, could create a misleading or incomplete view of Moelis’ analyses.

For purposes of its analyses, Moelis reviewed a number of financial metrics for each of DENTSPLY, Sirona and certain selected companies, including:

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Unless the context indicates otherwise, (i) forward-looking financial data relating to DENTSPLY were based on the DENTSPLY projections, as provided by management of DENTSPLY, as described below in the section entitled “— Certain Financial Projections Utilized by the DENTSPLY Board of Directors and DENTSPLY’s Financial Advisor,” (ii) forward-looking financial data for Sirona were based on the Adjusted Sirona projections, as provided by management of DENTSPLY, as described below in the section entitled “— Certain Financial Projections Utilized by the DENTSPLY Board of Directors and DENTSPLY’s Financial Advisor,” (iii) stock-based compensation for each of DENTSPLY and Sirona was treated as a cash expense in the discounted cash flow (“DCF”) analyses, (iv) net debt amounts were based on most recently published quarter end financial information, which, in the case of each of DENTSPLY and Sirona, was as of June 30, 2015, (v) per share amounts were calculated based on diluted shares outstanding as of September 11, 2015 using the treasury stock method, (vi) estimated EBITDA information for each of DENTSPLY and Sirona was Adjusted EBITDA, and (vii) estimated EPS information for each of DENTSPLY and Sirona was Non-GAAP EPS. For purposes of certain analyses described below, the “implied per share merger consideration” refers to the implied per share value of the merger consideration of $97.28 based on the exchange ratio of 1.8142 shares of DENTSPLY common stock per share of Sirona common stock and the closing price of DENTSPLY common stock as of September 14, 2015 of $53.62.

Financial Analyses

Selected Public Companies Analysis

DENTSPLY.  Moelis reviewed certain financial and stock market information of selected public companies with enterprise values greater than $1 billion that primarily manufacture or distribute dental products. Moelis reviewed, among other things, (i) enterprise values of the selected companies as a multiple of estimated EBITDA for calendar years 2015 and 2016 (“CY 2015E” and “CY 2016E”), (ii) price to earnings ratios (“P/E”) of the selected companies for CY 2015E and CY 2016E and (iii) the compound annual growth rate (“CAGR”) estimated for CY 2015-CY 2017 for each of revenues and EPS. Financial data for the selected companies was based on publicly available consensus research analysts’ estimates, public filings and other publicly available information as of September 14, 2015. The list of selected companies, listed in order of equity value, related multiples and the high, median, mean and low multiples for such selected companies, as well as the corresponding multiples of DENTSPLY and Sirona based on financial forecasts and other information and data provided by DENTSPLY’s management, were as follows:

Selected Companies (listed in order of equity value)

EV/EBITDA

P/E

CY 2015E-CY 2017E CAGR

CY 2015E

CY 2016E

CY 2015E

CY 2016E

Revenue

EPS

Henry Schein, Inc.

13.6x

12.5x

22.9x

20.5x

5.7

%

11.3

%

DENTSPLY(1)

14.1x

13.4x

20.7x

19.2x

3.6

%

9.0

%

Sirona

14.9x

13.8x

24.1x

22.0x

8.1

%

NA

(2)

Straumann Holding AG

21.8x

18.7x

31.2x

26.3x

8.4

%

15.8

%

Patterson Companies, Inc.

12.5x

11.4x

19.4x

17.4x

5.1

%

10.4

%

Align Technology Inc.

22.1x

16.9x

35.1x

27.2x

15.9

%

28.1

%

High

22.1x

18.7x

35.1x

27.2x

15.9

%

28.1

%

Median

14.5x

13.6x

23.5x

21.3x

6.9

%

11.3

%

Mean

16.5x

14.5x

25.6x

22.1x

7.8

%

14.9

%

Low

12.5x

11.4x

19.4x

17.4x

3.6

%

9.0

%

DENTSPLY (Management)

14.6x

13.9x

20.7x

19.1x

4.1

%

9.7

%

Sirona (DENTSPLY case)

15.6x