Outcomes After Metal-on-Metal Hip Resurfacing: Could We Achieve Better Function?
Presented to the British Hip Society, January 3, 2007, Leeds, England.
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<.001), restricted walking, and functional limitations.
Conclusions
Information about outcomes is important for patients undergoing surgery. Hip resurfacing remains an emergent technology, with further follow-up and investigation warranted. One explanation for suboptimal recovery may be current rehabilitation, originally developed after total hip arthroplasty. Rehabilitation tailored to hip resurfacing, paced for this active population and progressed to higher demand activities, may improve outcomes.
aPhysiotherapy Research Unit, Nuffield Orthopaedic Centre NHS Trust, Oxford, UK
bNuffield Department of Orthopaedic Surgery, University of Oxford, Oxford, UK.
Correspondence to Meredith A. Newman, MSc, MCSP, Physiotherapy Research Unit, Nuffield Orthopaedic Centre NHS Trust, Windmill Rd, Headington, Oxford, OX3 7LD, England
Supported by a Nuffield Orthopaedic Centre physiotherapy research unit project grant.
No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit upon the authors or upon any organization with which the authors are associated.
ABSTRACT