ITEM 2.02 Results of Operations and Financial Condition

On April 29, 2009, the Company issued a press release regarding results for the quarter ended March 31, 2009. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated herein by this reference.

ITEM 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers

(d) On April 28, 2009, the Board of Directors of American Dental Partners, Inc. (the "Company") filled the vacancy created by the retirement of James T. Kelly by electing David E. Milbrath, D.D.S. to serve as a Class II Director. Dr. Milbrath is the Chairman of Metropolitan Dental Management, Inc., the management company that was acquired in connection with the Company's affiliation with Metro Dentalcare, one of the Company's Minnesota affiliated dental groups. Dr. Milbrath earned his doctor of dental surgery degree from the University of Minnesota and in 1968, opened his first practice which led to his founding of Metro Dentalcare. He also founded Merit Dental Lab, a full-service prosthetic dental lab. At the time of affiliation with the Company, Metro Dentalcare had grown to 34 dental facilities with 90 dentists. Dr. Milbrath is a member of the American Dental Association, the Minnesota Dental Association and the Minneapolis District Dental Society. Dr. Milbrath will not serve as a member of any of the standing committees of the Board.

ITEM 9.01 Financial Statements and Exhibits

(c) Exhibits

99.1 Press release dated April 29, 2009 regarding results for the quarter ended March 31, 2009.

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