Exhibit 10.21

DESCRIPTION OF THE

SIRONA DENTAL SYSTEMS, INC.

2009 EXECUTIVE BONUS PLAN



|1. | Purpose. The purpose of the Executive Bonus Plan (the Plan) is to provide to senior executive officers selected by the Executive Compensation Committee of the
Board of Directors of the Company (the Committee) cash bonus compensation that is (1) performance based and (2) competitive at target performance with the cash bonuses paid to similarly situated senior executives. The Plan
replaces the cash bonus compensation component of total compensation used in prior years for the participants of the Plan, such as the Companys EVA Plan or the cash bonuses paid pursuant to such participants employment agreement.
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|2. | Administration. The Plan is administered by the Committee. The Committee determines target Plan performance metrics based upon budgetary estimates of financial performance
approved by the Board of Directors in the first quarter of each fiscal year. The Committee determines the target bonus amount (the Target Bonus) of each participant as a percentage of such participants base annual salary. The
Committee also determines the percentage of Target Bonus payable to each participant at performance levels above and below target performance for each of the metrics described below on an annual basis. The Committee may amend the Plan from time to
time, in its sole discretion.
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|3. | Financial Performance Metrics. The financial performance metrics used to measure and reward performance under the Plan have two major components: a Revenue Metric and an
Adjusted EBITDA Metric.
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| | (a) | Revenue Metric. The Revenue Metric is the Companys fiscal year revenue, as reported in its financials. The Revenue Metric is given a weighting of 25% in calculating
each participants bonus. That means, in the event that the actual fiscal year Revenue Metric achieves target, each participant will receive 25% of his or her Target Bonus. Each participant will receive greater or less than the 25% of Target
Bonus to the extent the Revenue Metric exceeds or is less than the revenue target. Participants may receive no more than twice their 25% (or a total 50%) of Target Bonus due to actual fiscal year revenue.
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| | (b) | Adjusted EBITDA Metric. The Adjusted EBITDA Metric has been determined by the Committee to be fiscal year net income as reported by the Company in its financials, subject to
certain adjustments and items determined by the Committee. If the fiscal year Adjusted EBITDA Metric achieves target, each participant will receive 75% of his or her Target Bonus. Each participant will receive greater or less than the 75% of Target
Bonus to the extent the Adjusted EBITDA Metric exceeds or is less than the adjusted EBITDA target. Participants may receive no more than twice their 75% (or a total 150%) of Target Bonus due to actual fiscal year adjusted EBITDA.
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|4. | Calculation of Bonus Award. The bonus awards for all participants in the Plan is calculated with the same method.
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Fiscal year cash bonus = bonus earned due to actual fiscal year Revenue Metric performance + bonus earned due to actual fiscal year Adjusted EBITDA
Metric performance. There are no elements of individual performance considered in determining any award.

The Committee has determined for
FY 2009 that the Target Bonus amounts set forth below for each participant will be used to calculate his or her actual FY 2009 bonus earned.



|               |  |                          
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|Participant    |  | Target Bonus Amount      
|Jost Fischer   |  | 84% of annual base salary
|Simone Blank   |  | 59% of annual base salary
|Jeffrey Slovin |  | 59% of annual base salary
|Theo Haar      |  | 58% of annual base salary



|5. | Termination of Employment or Change in Control. There are no payments to any person upon termination of employment (for any reason) or upon a change in control of the Company
pursuant to the Plan, however, participants may be eligible for such payments under their employment or other agreements with the Company.
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|6. | Payment. The Committee shall determine the amount earned based upon the Companys audited financial statements and payment shall be made to participants in the calendar
year that includes the end of the relevant fiscal year and within 10 days of the Committees determination of the amount earned.
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