Document:

Exhibit
10.17

AMENDMENT LETTER

From:
     Sirona Dental
Systems, Inc, as Obligors’ Agent under the Senior Facilities Agreement (as
defined below) for and on behalf of each of the Obligors

To:          J.P. Morgan
Europe Limited (as Facility Agent under the Senior Facilities Agreement (as
defined below))

5 December 2006

Dear
Sir,

1.                                      Introduction

(a)                                  We refer to the
senior facilities agreement dated 22 November 2006 and made between, amongst
others, Sirona Dental Systems, Inc., Schick Technologies, Inc., Sirona Dental
Systems GmbH, Sirona Dental Services GmbH, Sirona Dental Systems LLC, Sirona
Holding  GmbH, Sirona Immobilien GmbH
together with J.P. Morgan plc and UBS Limited as mandated lead arrangers, J.P.
Morgan Chase Bank, N.A. and UBS Limited as original lenders and J.P. Morgan
Europe Limited as facility agent (the Senior Facilities
Agreement);

(b)                                 Capitalised terms
defined in the Senior Facilities Agreement have the same meaning when used in
this letter, unless expressly defined in this letter.

2.                                      Amendments

Pursuant to Clause 38 of the Senior Facilities Agreement, we request the
Majority Lenders’ approval that the following provisions of the Senior
Facilities Agreement are amended as follows:

(a)                                  the cross
reference to paragraph 2(d) of Part 1 of Schedule 2 (Conditions Precedent to Delivery of a Utilisation Request)
in the definition of “Funds Flow Statement” in Clause 1.1 (Definitions) be amended to refer to
paragraph 2 (c) of Part 1 of Schedule 2;

(b)                                 the cross
reference to paragraph (g) of Clause 21.9 (Limitation
on Payment Obligations by German Guarantors and limitation regarding LTIBRs)
in the defintion of “German Borrower” in Clause 1.1 (Definitions) be amended to refer to paragraph  (h) of Clause 21.9;

(c)                                  the cross
reference to sub-paragraph (b)(viii) of Clause 25.14 (Loans and credit) in the defintion of
“Invested Funds” in Clause 1.1 (Definitions)
be amended to refer to paragraph (b)(vii) of Clause 25.14;

(d)                                 the cross
reference to paragraph 8 of Part II of Schedule 2 (Conditions Precedent) in the definition of “Legal Opinions”
in Clause 1.1 (Definitions) be
amended to refer to Paragraph 9 of Part II of Schedule 2;

(e)                                  the cross
reference to paragraph (c) of Schedule 12 (Certain
Funds Default)  in Clause 4.3
(Certain Funds) be amended to
refer to Paragraph (b) of Schedule 12;

(f)                                    paragraph (d) of
Clause 11.11 (Restrictions) be
amended by the insertion of the words “(other than under Clause 11.8 (Equity Proceeds) or Clause 11.9 (Disposal Proceeds))” after the words “ any
part of the Revolving Facility which is prepaid “ in such clause;

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(g)                                 the cross
reference to paragraph (c) of Clause 11.7 (Exit)
in paragraphs (a) and (d) of Clause 
11.12 (Prepayment elections)
be amended to refer paragraph (b) of Clause 11.7;

(h)                                 Clause 16.3 (Tax Indemnity) be amended by the deletion
of the word “and” and its replacement with the word “or” at the end of the
paragraph (b) (i) of such clause;

(i)                                     the cross
reference to sub-paragraph (b) (iii) of Clause 25.7 (Acquisitions) in the defintion of “Consolidated Adjusted
EBITDA” in Clause 24.1 (Financial
definitions) be amended to refer to sub-paragraph (b) (ii) of Clause
25.7;

(j)                                     the cross
reference to paragraph (a) of Clause 23.1 (Financial
Statements)  in the defintion
of “Semi-Annual Financial Statements” in Clause 24.1 (Financial definitions) be amended to refer
to paragraph (b) of Clause 23.1;

(k)                                  paragraph (a) of
Clause 24.2 (Financial condition)
be amended by the deletion of the word “less” and its replacement with the word
“greater” in the third line of such clause;

(l)                                     the cross reference
to sub-paragraph (b) (iii) of Clause 25.7 (Acquisitions)
in Clause 24.4 (Adjustments) be
amended to refer to sub-paragraph (b) (ii) of Clause 25.7;

(m)                               the cross
reference to sub-paragraph (xvi) in sub-paragraph (xvi) of Clause 25.11 (Negative pledge) be amended to refer to
sub-paragraph (xv) of such clause;

(n)                                 the cross
reference to sub-paragraph (b) (vii) of Clause 25.14 (Loans and Credit) in paragraph (c) of
Clause 25.16  (Dividends, share capital redemptions and payments on subordinated debt)
be amended to refer to sub-paragraph (b) (vi) 
of Clause 25.14.

3.                                      Agreement

By
countersigning this letter the Facility Agent (acting on the instructions of
the Majority Lenders) agrees to the amendments set out above.  Except as expressly amended by this letter
the Finance Documents shall continue in full force and effect in accordance
with their respective terms.

4.                                      Governing Law

This
letter is governed by English law.

This
letter is a Finance Document.

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Please sign and return a copy
of this letter to confirm your agreement to the above.

Yours
faithfully,

 

	
  /s/ SIMONE BLANK

  	
   

  
	
   

  
	
  for

  
	
  Sirona Dental
  Systems, Inc

  
	
  for itself and
  as agent for each

  
	
   

  
	
  of the other
  Obligors under the Senior Facilities Agreement

  

 

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We agree to the above.

 

	
  /s/ CYRUS METHA

  	
   

  
	
   

  
	
   

  
	
  for

  
	
  J.P.
  MORGAN EUROPE LIMITED

  
	
  as Facility
  Agent for

  
	
   

  
	
  and on behalf of
  the Majority Lenders

  
	
  under the Senior
  Facilities Agreement

  

 

 4Exhibit 10.1

MACK-CALI REALTY
CORPORATION

RESTRICTED
SHARE AWARD AGREEMENT

Mitchell E. Hersh

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AGREEMENT EVIDENCING THE GRANT

OF A RESTRICTED SHARE AWARD PURSUANT

TO THE EMPLOYEE STOCK OPTION PLAN

OF MACK-CALI
REALTY CORPORATION

AGREEMENT
(“Agreement”) effective as of December 5, 2006 (“Grant Date”) by and between
Mack-Cali Realty Corporation (the “Company”) and Mitchell E. Hersh (“Recipient”).

WHEREAS,
pursuant to the 2000 Employee Stock Option Plan of Mack-Cali Realty Corporation
(the “Plan”), the Company hereby awards shares of the Company’s common stock,
par value $.01 per share (“Common Stock”) to the Recipient subject to such
terms, conditions, and restrictions (hereinafter, “Restricted Share Award”) as
set forth in the Plan and this Agreement;

NOW
THEREFORE, the parties hereto hereby agree as follows:

1.                                      Award of Shares of Restricted Stock.

Pursuant
to the Plan, the Committee hereby awards to the Recipient, effective as of the
Grant Date, a Restricted Share Award representing the conditional receipt of
fifteen thousand (15,000) shares of Common Stock (“Restricted Shares”) at no
out-of-pocket costs to the Recipient subject to the terms, conditions and
restrictions set forth herein. 
Capitalized terms not otherwise defined in this Agreement shall be as defined
in the Plan.

2.                                      Award Restrictions.

(a)           General
Rules.  Notwithstanding that
ownership of Restricted Shares is fully vested in the Recipient as of the Grant
Date, the Restricted Shares granted hereunder may not be disposed of on or
prior to, and shall not be transferable until the first day following the six
month anniversary of the Grant Date (the “Holding Period”).

(b)           Vesting.  All fifteen thousand (15,000) Restricted
Shares granted hereunder shall be fully vested in the Recipient on the Grant
Date.

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(c)           Expiration
of the Holding Period.  Upon the
expiration of the Holding Period, the Recipient shall own the Restricted Shares
free and clear of all restrictions imposed by this Agreement and the Recipient
shall be free to hold or dispose of such Restricted Shares in his discretion,
subject to applicable federal and state law or regulations.

(d)           Prohibition
Against Assignment.  During the
Holding Period, the Restricted Shares may not be transferred or encumbered by
the Recipient by means of sale, assignment, mortgage, transfer, exchange,
pledge, or otherwise.  The levy of any
execution, attachment, or similar process upon the Restricted Shares shall be
null and void.

3.             Stock
Certificates.

(a)           Certificates.  Restricted Shares shall be evidenced by a
certificate registered in the name of the recipient or a nominee or nominees
therefor.  As soon as practicable
following the date hereof, the Company shall prepare a certificate for the
Restricted Shares, which shall be registered in the name of the Recipient or a
nominee and which shall bear such restrictive legend or legends (if any) as the
Company may deem necessary or desirable under any applicable law.

(b)           Effect
of the Expiration of the Holding Period. 
Upon the expiration of the Holding Period, the Company shall cause to be
delivered to the Recipient a certificate for the Restricted Shares free and
clear of restrictive legends.  In the
event that the Recipient dies before delivery of the certificate for the
unrestricted Restricted Shares, such certificate shall be delivered to, and
registered in the name of, the Recipient’s beneficiary or estate, as the case
may be.

(c)           Rights
of Stockholder.  Except as otherwise
provided in Section 2 and this Section 3, during the Holding Period and after
the certificates for the Restricted Shares have been issued, the Recipient
shall be entitled to all rights of a stockholder of the Company, including the
right to vote and the right to receive dividends, with respect to the
Restricted Shares subject to this Agreement. 
Subject

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to applicable withholding requirements,
if any, dividends on the Restricted Shares shall be paid to the Recipient when
earned and payable.

4.             Termination
of Employment.

A
termination of the Recipient’s employment with the Company for any reason on or
prior to the expiration of the Holding Period shall have no effect on the
obligations of the Company under this Agreement.  In the event that the Recipient’s employment
with the Company is terminated for any reason on or prior delivery of the
certificate for the unrestricted Restricted Shares, such certificate shall be
delivered to the Recipient in accordance with Section 3 as if the Recipient’s
employment with the Company had not been terminated.

5.             Withholding.

In
connection with the delivery of any stock certificates, or the making of any
payment in accordance with the provisions of this Agreement, to the extent not
otherwise paid by or on behalf of the Recipient, the Company shall withhold
Restricted Shares or cash amounts (for fractional Restricted Shares) equal to
the taxes then required by applicable federal, state and local law to be so
withheld.

6.             Adjustments
for Capital Changes.

In
the event of any change in the outstanding shares of Common Stock of the
Company by reason of any stock dividend or split, recapitalization, merger,
consolidation, spin-off, reorganization, combination or exchange of shares, or
other similar corporate change, or other increase or decrease in such shares
effected without receipt or payment of consideration by the Company, a duly
authorized representative of the Company shall adjust the number of Restricted
Shares granted pursuant to the Plan and this Agreement to prevent dilution or
enlargement of the rights granted to the Recipient.

7.             No
Right to Continued Employment.

Nothing
in this Agreement shall confer on the Recipient any right to continue as an
employee of the Company or in any way affect the Company’s or any

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subsidiary’s right to terminate the
Recipient’s employment at any time subject to the terms of the Recipient’s
employment agreement.

8.             Notice.

Any notice to the
Company hereunder shall be in writing addressed to:

Mack-Cali Realty
Corporation

P.O. Box 7817

Edison, New Jersey 08818-7817

	
   

  	
  Attn:

  	
   

  	
  Roger W. Thomas

  
	
   

  	
   

  	
   

  	
  General Counsel

  
	
   

  	
   

  	
   

  	
   

  

Any notice to the Recipient hereunder shall be in writing addressed to:

the Recipient at his address as set forth in the Company records or
such other address as the Recipient shall notify the Company of in writing.

9.             Section
409A.

This
Restricted Share Award Agreement is not intended to provide for an elective
deferral of compensation that would be subject to Section 409A of the Internal
Revenue Code of 1986, as amended (the “Code”), and the Company reserves the
right to unilaterally amend or modify this Agreement to ensure that the awards
do not become subject to the requirements of Section 409A thereof.

10.          Entire
Agreement.

This
Agreement contains the entire understanding of the parties and shall not be
modified or amended except in writing and duly signed by each of the parties
hereto.  No waiver by either party of any
default under this Agreement shall be deemed a waiver of any later default
hereunder.

11.          Construction.

The
various provisions of this Agreement are severable in their entirety.  Any determination of invalidity or
unenforceability of any one provision shall have no effect on the continuing
force and effect of the remaining provisions.

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12.          Governing
Law.

This
Agreement shall be governed by the laws of the State of New Jersey applicable
to contracts made, and to be enforced, within the State of New Jersey.

13.          Successors.

This
Agreement shall be binding upon and inure to the benefit of the successors,
assigns and heirs of the respective parties.

IN
WITNESS WHEREOF, the parties hereto have executed this
Agreement to be effective on the date first above written.

	
  

  	
  Mack-Cali Realty Corporation

  
	
   

  	
   

  
	
   

  	
  By:

  	
   

  	
  /s/ Barry Lefkowitz

  
	
   

  	
   

  	
   

  	
  Barry Lefkowitz

  
	
   

  	
   

  	
   

  	
  Executive Vice President

  
	
   

  	
   

  	
   

  	
  and Chief Financial Officer

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
  Recipient

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
  /s/
  Mitchell E. Hersh

  	
   

  	
   

  
	
   

  	
  Mitchell
  E. Hersh

  	
   

  	
   

  
						

 

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