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A long term study of Charnley total hip replacements
Archivio "Putti" Di Chirurgia Degli Organi Di Movimento
|January 1, 1989
Summary
This study evaluated 100 Charnley low friction arthroplasties over 15 years. Results show high survival rates for hip implants, with 91% overall survival and good clinical outcomes, despite some component wear and loosening.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
Background:
- The Charnley low friction arthroplasty is a common hip replacement procedure.
- Long-term outcomes and failure modes require continued investigation.
Purpose of the Study:
- To assess the long-term survival and clinical outcomes of the first 100 Charnley low friction arthroplasties.
- To identify factors associated with implant failure and wear.
Main Methods:
- Survival analysis of 100 hip arthroplasties with a minimum 14.4-year follow-up.
- Clinical evaluation of surviving implants.
- Radiographic assessment for component loosening and wear.
Main Results:
- Fifteen-year survival rates: 91% for total arthroplasty, 91% for femoral component, 96% for acetabular component.
- 87.5% of surviving hips had good or excellent clinical results.
- Polyethylene wear averaged 1.85 mm, associated with male sex and calcar resorption.
Conclusions:
- Charnley low friction arthroplasty demonstrates durable long-term performance.
- Femoral component loosening correlates with femoral shaft diameter.
- Polyethylene wear is a significant factor in long-term implant integrity.