American Dental Partners Announces Conference Call to Review First Quarter 2005 Financial Results.

WAKEFIELD, Mass. -- American Dental Partners, Inc. (NASDAQ:ADPI) will conduct a conference call to review first quarter 2005 financial results on Thursday, April 28, 2005 at 10:00 a.m. EST 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 and www.streetevents.com approximately two hours after the call through 5:00 p.m. EST Thursday, May 12, 2005.

American Dental Partners is one of the nation's leading business partners to dental group practices. The Company is affiliated with 20 dental groups which have 182 dental facilities with approximately 1,636 operatories located in 18 states.

Note: Some of the information in this press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. The words "believe," "expect," "anticipate," "project,'' and similar expressions, among others, identify forward-looking statements. Forward-looking statements speak only as of the date the statement was made. Such forward-looking statements are subject to uncertainties and other factors that could cause actual results to differ materially from those projected, anticipated or implied. Certain factors that might cause such a difference include, among others, the Company's risks associated with overall or regional economic conditions, contracts its affiliated dental group practices have with third party payors and the impact of any terminations or potential terminations of such contracts, the cost of and access to capital, the fluctuations in labor markets, the Company's acquisition and affiliation strategy, management of rapid growth, dependence upon affiliated dental group practices, dependence upon service agreements and government regulation of the dental industry. Additional risks, uncertainties and other factors are set forth in the "Risk Factors" section of the Company's Registration Statement on Form S-4 (File No. 333-56941).