American Dental Partners Inc (ADPI)

WAKEFIELD, MA -- (MARKET WIRE) -- 12/01/09 --
American Dental Partners, Inc. (NASDAQ: ADPI)
announced today that it has completed the previously announced acquisition
of certain non-clinical assets of Christie Dental Practice Group, P.L. and
Christie Dental Partners, Inc. (collectively, "Christie Dental") and
entered into a 40-year service agreement with Christie Dental Practice
Group, P.L. The purchase price paid in connection with the acquisition
consisted of cash in the amount of $27 million and was funded by cash on
hand and the Company's senior secured credit facility. Following the
completion of the acquisition, the Company had approximately $100 million
outstanding under its credit facility.

Founded in 1997, Christie Dental is a multi-specialty dental group with 55
dentists and 26 practice locations in the Melbourne, Ocala and Orlando,
Florida markets and generates approximately $25 million in patient revenue
annually.

American Dental Partners is one of the nation's leading business partners
to dental group practices. The Company is affiliated with 27 dental group
practices that have 267 dental facilities with approximately 2,276
operatories located in 19 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 affect the matters herein described, including but not limited
to the Company's risks associated with overall or regional economic
conditions, dependence upon affiliated dental practices, contracts its
affiliated practices have with third-party payors, government regulation of
the dental industry, impact of health care reform, dependence upon service
agreements and the impact of any terminations or potential terminations of
such contracts, business interruptions, the outcome of pending litigation
and the Company's acquisition and affiliation strategy, which are detailed
from time to time in the "Risk Factors" section of the Company's filings
with the Securities and Exchange Commission, including the annual report on
Form 10-K for the year ended December 31, 2008 and quarterly reports on
Form 10-Q.

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 Place, Suite 430
Wakefield, MA  01880
Phone: 781/224-0880
Fax: 781/224-4216