The analysis of the causes for ABGⅠacetabular prosthesis revisions
- VernacularTitle:ABGⅠ代髋臼杯假体翻修原因分析
- Author:
Yanqing LIU
- Publication Type:Journal Article
- Keywords:
Hydroxyapatites;
Acetabulum;
Prosthesis failure;
Reoperation
- From:
Chinese Journal of Orthopaedics
1996;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
10%, and the polyethylene liner wear rate was calculated according to offset distance of femoral head, which was measured on AP X-ray. Results 11 hips were revised winth 5 years post-operation, and 66 hips were revised within 6-12 years. The majority of revisions were done between 7 to 9 years post-operation. The causes for revision were analyzed based on X-ray films. There were prosthesis loosening in 42 hips, severe osteolysis in 43, hips mild osteolysis in 12 hips. All prosthesis liners wore in different degree. Except for some factors that probably affected the results, such as 18 cases of cup malposition, 6 cases of acetabular dysplasia with acetabular bone graft and 2 cases of trauma, 2 cases of dislocation, there were 49 revisions probably due to prosthetic reason. The liner wear rate was (0.26?0.10)mm/y. No good ongrowth bone was found on the surface of the cups taken off from the patients. Conclusion This HA coated cup has a good medium term result, and poor long-term result. The main causes for acetabular cup revision rate are the acetabular dysplasia, malposition of acetabular prosthesis, high liner wear rate and osteolysis related to too many screws.
