Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Friedman Jonathan I
 2. Date of Event Requiring Statement (Month/Day/Year)
10/18/2007		 3. Issuer Name and Ticker or Trading Symbol
SIRONA DENTAL SYSTEMS, INC. [siro]
(Last)
(First)
(Middle)
SIRONA DENTAL SYSTEMS, INC., 30-30 47TH AVENUE, SUITE 500		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
General Counsel and Secretary
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

LONG ISLAND CITY, NY 11101		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Options(Right to buy) 09/10/2009 09/10/2017 Common Stock 40,000 (1) $ 29.91 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Friedman Jonathan I
SIRONA DENTAL SYSTEMS, INC.
30-30 47TH AVENUE, SUITE 500
LONG ISLAND CITY, NY 11101		       General Counsel and Secretary  

Signatures

Jonathan Friedman, by Michael Friedlander, Attorney 10/29/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Stock options shall vest as follows: 20,000 on 9/10/2009, 10,000 on 9/10/2010 and the final 10,000 on 9/10/2011.
 
Remarks:
By resolution on Thursday, October 18, 2007, the Sirona Dental Systems, Inc. Board of Directors determined that Jonathan Friedman is a Section 16 reporting person.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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