Metal-on-Metal Hip Resurfacing: Appropriate Patient Selection is Essential

Metal-on-metal hip resurfacing is a useful option to consider for increasingly younger and more active patients. We report here patient selection factors associated with increased risk of revision after implantation of 1148 Cormet 2000 resurfacing implants. This prospective, multicenter study evaluated subjects preoperatively through 2 years using standardized questionnaires, physical examinations, and radiographic evaluations. Eight hundred twenty-five men and 323 women received the device. Forty-four (3.8%) revisions were required; 21 in women (6.5%) and 23(2.8%) in men. Fifty percent of the revisions occurred in patients with smaller component sizes, and 20%, in patients with a diagnosis other than OA. This study identified 4 factors predictive of revision.