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What is the midterm survivorship and function after hip resurfacing?
Luthfur Rahman1, Sarah K Muirhead-Allwood, Muhannad Alkinj
1The London Hip Unit, 30 Devonshire Street, London, W1G 6PU, UK. luthfur.rahman@doctors.org.uk
Clinical Orthopaedics and Related Research
|June 25, 2010
Summary
Hip resurfacing arthroplasty shows 9-year survival of 96.5% and improved function. This hip surgery is a viable alternative to total hip replacement, especially for younger men, with factors like BMI and component size influencing outcomes.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Reconstructive Surgery
Background:
- Hip resurfacing arthroplasty offers improved function but requires further study beyond pioneering centers.
- Existing research often lacks sufficient patient numbers or long-term follow-up for hip resurfacing.
- Early failure in hip resurfacing has been linked to various contributing factors.
Purpose of the Study:
- To evaluate the midterm survival rate of Birmingham Hip Resurfacing (BHR).
- To assess functional outcomes in patients undergoing hip resurfacing.
- To identify if patient demographics (age, gender, BMI) or implant size impact BHR failure rates.
Main Methods:
- Retrospective review of 302 patients (329 hips) who underwent hip resurfacing.
- Assessment of survivorship using Kaplan-Meier analysis and functional hip scores (HHS, OHS, WOMAC, UCLA).
- Analysis of potential risk factors including age, gender, body mass index (BMI), and component size.
Main Results:
- Midterm survival at 9 years was 96.5% (95% CI, 94.7-98.4) for hip resurfacing.
- Significant improvements were observed in all functional hip scores post-surgery.
- Lower survivorship was noted in women compared to men, with smaller component sizes and lower BMIs in revised cases.
Conclusions:
- Hip resurfacing provides comparable midterm survivorship and functional outcomes to data from leading centers.
- Hip resurfacing is a suitable alternative to total hip arthroplasty (THA), particularly for younger males.
- Component size and patient BMI are identified as factors potentially related to hip resurfacing failure.
