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Socket wear in bilateral simultaneous total hip arthroplasty.
A Joshi1, T Ilchmann, L Markovic
1Centre for Hip Surgery, Wrightington Hospital, Wigan, Lancashire, England.
The Journal of Arthroplasty
|February 15, 2001
Summary
This study on Charnley total hip arthroplasty wear found that while individual hip wear varied, overall linear wear was not significantly side-related. Factors like male sex and higher body weight were associated with increased wear.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Medical device engineering
Background:
- Total hip arthroplasty (THA) is a common procedure to alleviate hip pain and restore function.
- Understanding polyethylene wear in THA is crucial for predicting long-term implant survival.
- Charnley low-friction arthroplasty is a widely studied THA design.
Purpose of the Study:
- To investigate the long-term wear behavior of Charnley total hip arthroplasties.
- To determine if there are significant differences in wear between left and right hips.
- To identify patient-specific factors influencing linear wear rates.
Main Methods:
- A retrospective study of 51 patients undergoing bilateral simultaneous Charnley THA.
- Mean follow-up duration of 14.7 years.
- Analysis of revision rates and measurement of linear wear rates for both left and right hips.
Main Results:
- The mean linear wear rate was 0.071 mm/y for left hips and 0.081 mm/y for right hips.
- Significant side-to-side differences in wear were observed within individual patients.
- Increased linear wear was correlated with male sex and higher body weight.
- Fourteen hips (27.5%) required revision during the follow-up period.
Conclusions:
- Linear wear in Charnley THA is not inherently side-dependent, despite individual variations.
- Patient factors such as sex and body weight are important considerations for wear prediction.
- Long-term monitoring of THA wear is essential for patient management and implant longevity.