ADPI American Dental Partners, Inc. (MM)

American Dental Partners, Inc. (NASDAQ: ADPI) will conduct a conference call to review second quarter and first half 2009 financial results on Tuesday, July 28, 2009 at 9:00 a.m. EDT which will also be broadcast live over the Internet at www.amdpi.com.

Gregory A. Serrao, Chairman, President and Chief Executive Officer, will host the conference call. In addition to historic results, the teleconference may include discussion of management's expectations of future operating and financial results. To access the webcast, participants should visit the Investor Relations section of the website at least fifteen minutes prior to the start of the conference call to download and install any necessary audio software. A replay of the webcast will be available at www.amdpi.com approximately two hours after the call through 6:00 p.m. EDT Tuesday, August 4, 2009.

American Dental Partners is one of the nation's leading business partners to dental group practices. The Company is affiliated with 26 dental groups which have 243 dental facilities with approximately 2,120 operatories located in 18 states.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: With the exception of the historical information contained in this news release, the matters described herein contain "forward-looking" statements that involve risk and uncertainties that may individually or collectively impact the matters herein described, including but not limited to the Company's risks associated with its ability to refinance its credit facilities on satisfactory terms, overall or regional economic conditions, dependence upon affiliated dental practices, contracts its affiliated practices have with third-party payors, dependence upon service agreements and government regulation of the dental industry, the impact of any terminations or potential terminations of such contracts and the Company's acquisition and affiliation strategy, which are detailed from time to time in the "Risk Factors" section of the Company's SEC reports, including the annual report on Form 10-K for the year ended December 31, 2008.

Contacts: Gregory A. Serrao Chairman, President and Chief Executive Officer 781-224-0880 Breht T. Feigh Executive Vice President, Chief Financial Officer and Treasurer 781-224-0880 American Dental Partners, Inc. 401 Edgewater Drive, Suite 430 Wakefield, MA 01880 Phone 781/224-0880 Fax 781/224-4216