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Congratulations to our first class of Achievement Award Winners!

Active volunteer involvement is at the heart of AAOS activities. Our meetings, courses, educational materials, clinical practice guidelines, and advocacy efforts are just a few of the many activities that depend on participation by volunteers for their success. Volunteers are vital—not only to the AAOS, but also to orthopaedic specialty societies; national, state, and local orthopaedic societies; and the broader medical community.

The AAOS Board of Directors established the Achievement Award Program to encourage and enhance individual growth of Academy members, and to thank them for their many contributions to education, research, and advocacy in orthopaedics. This new program recognizes participation by AAOS members in Academy programs and elsewhere in orthopaedics.

This program was designed to recognize those who are freely giving back and to create an incentive for others to do the same. For more information on the Achievement Awards Program, visit www.aaos.org/news/whatsnew/achievementawards.asp

The Biologic Response to Bearing Materials

Total joint arthroplasty (TJA) is a common and highly successful orthopaedic procedure for which surgeons can use different bearing materials. The materials used for TJA must be both biocompatible to minimize adverse local tissue reactions and robust enough to support weight bearing during common daily activities. Modern bearing materials for TJA are made from metals and their alloys, polymers, and ceramics. The orthopaedic surgeon should be knowledgeable about the biologic response to the different bearing materials used for TJA, as well as the wear by-products generated.