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.
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