The objective of this workshop was to provide a forum to discuss the reintroduction of metal on metal bearings for clinical use in total hip arthroplasty. Approximately 100 researchers clinicians, and industry representatives presented the state of the art interpretation of the metal on metal total hip replacement’s past performance, and the clinical, tribologic, and biologic considerations of all metal bearings. Based on the scientific presentations at the symposium, the extant literature, the clinical experience of the panelists, and the current regulatory, legal, and economic environment, consensus statements were developed.

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