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Analysis of removed autophor ceramic-on-ceramic components
F J Kummer1, S A Stuchin, V H Frankel
1Department of Bioengineering, Hospital for Joint Diseases Orthopaedic Institute, New York, NY 10003.
The Journal of Arthroplasty
|March 1, 1990
Summary
Autophor alumina ceramic hip implants showed significant wear, including material loss, after an average of 29 months. This wear worsened with longer implantation times, indicating potential longevity issues for these total hip arthroplasty components.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Materials engineering
Background:
- Total hip arthroplasty (THA) is a common procedure for hip joint restoration.
- Alumina ceramic components are used in THA due to their perceived wear resistance.
- Understanding wear mechanisms in ceramic implants is crucial for improving long-term outcomes.
Purpose of the Study:
- To evaluate the wear characteristics of Autophor alumina ceramic total hip arthroplasty components.
- To determine the nature and extent of material loss in retrieved explants.
- To correlate wear with implantation duration.
Main Methods:
- Direct measurement of component dimensions.
- Scanning electron microscopy (SEM) analysis of wear debris.
- Histological examination of periprosthetic tissues.
Main Results:
- All six retrieved Autophor alumina ceramic THA components exhibited marked wear.
- Gross material loss was evident across all evaluated components.
- Wear severity correlated positively with the duration of component implantation, ranging from 8 to 54 months.
Conclusions:
- Autophor alumina ceramic THA components demonstrate significant wear, including substantial material loss.
- The observed wear increases with longer implantation periods.
- These findings suggest potential concerns regarding the long-term durability and performance of these specific ceramic implants.