Outcomes After Metal-on-Metal Hip Resurfacing: Could We Achieve Better Function?

Abstract Newman MA, Barker KL, Pandit H, Murray DW. Outcomes after metal-on-metal hip resurfacing: could we achieve better function? Objective To report functional outcomes after metal-on-metal (MOM) hip resurfacing. Design A cohort of 126 MOM hip resurfacing operations were reviewed 1 year after surgery. Setting Hospital trust specializing in orthopedic surgery. Participants Sixty-seven right and 59 left hips were reviewed in patients (N=120; 71 men, 49 women; mean age, 56±9y; range, 24–76y). Interventions Not applicable. Main Outcome Measures Administered once at follow-up. Function was measured using the Oxford Hip Score (OHS), Hip disability and Osteoarthritis Outcome Score, and UCLA Activity Score. Complications, pain, range of motion, Trendelenburg test, strength, walking, single-leg stand, stair climbing, and 10-m walk time were assessed. Results Overall examination was satisfactory with few complications. High functional levels were reported. The median OHS was 15 and median UCLA Activity Score 7 (active). For 25%, outcome was poor with persistent pain, reduced hip flexion (mean, 94.46°±12.7°), decreased strength ( P