Outcomes of metal-on-metal hip resurfacing arthroplasty: a single-surgeon series of 6114 cases with 2–19 year follow-up

Between December 2004 and April 2022, a single surgeon completed 6114 hip resurfacing cases using the Biomet Magnum-ReCap™ system; the first 739 cases were performed using hybrid fixation, and the latter 5375 cases, beginning in 2007, were fully uncemented. The primary purpose of this study was to evaluate the long-term clinical outcomes of a large single-surgeon series of metal-on-metal hip resurfacing, with a secondary aim of comparing these results with the current best outcomes among available literature and registry data for total hip replacement and hip resurfacing. For the entire cohort, 19-year Kaplan-Meier implant survivorship was 97.5%, while for the hybrid fixation subgroup, this was 94.6%. For the uncemented subgroup, 16-year Kaplan-Meier implant survivorship was 98.2%. Since 2012, no difference was seen regardless of sex; there’s been no difference in implant survivorship based on diagnosis or implant size since 2007. At the time of publication, this study represents the largest single-surgeon series of metal-on-metal hip resurfacing with long-term data and the second-best long-term implant survivorship for any type of hip arthroplasty ever published.