A Comparison of Hip Muscle Mass, Muscle Power, and Clinical Outcomes with Long-Term Follow-Up in Patients with Metal-on-Metal Hip Arthroplasty Compared to Metal-on-Polyethylene Hip Arthroplasty

(1) Background: Metal-on-metal (MoM) total hip arthroplasty (THA) and resurfacing (HRA) was presumed to provide superior functional outcomes compared metal-on-polyethylene (MoP) THA. (2) Methods: We muscle mass, power, step test asymmetry, patient-reported between MoM THA/HRA MoP A of 51 THA/HRAs 23 THAs participated in the cross-sectional study at a mean 6.5 (2.4–12.5) years postoperatively. Muscle mass measured by Dual energy X-ray Absorption (DXA) scans power Leg Extensor Power Rig. Step asymmetry obtained with an Inertial Measurement Unit (IMU). The patients completed Harris Hip Score (HHS) Copenhagen Groin Outcome (HAGOS). (3) Results: group had greater inter-limb difference THA (p = 0.02). Other differences were similar > 0.05). thigh calf area both legs higher < 0.009). time when ascending lower 0.03). HHS HAGOS scores groups (4) Conclusion: Overall, we could not verify hypothesis that contributes