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Osteolysis and subsequent component loosening will be minimal if the wear rate continues
67%
2542/3779
Osteolysis and subsequent component loosening will be greater than conventional hip arthroplasty if the wear rate continues
24%
900/3779
Component positioning should have no effect on wear rates of these bearings
7%
258/3779
All total hip arthroplasties should use this new polyethylene
1%
36/3779
Patient satisfaction will be greater at 10 year follow up
21/3779
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Polyethylene wear rates have shown association with osteolysis and subsequent component loosening. Wear rates above 0.1 mm per year are at significant risk of osteolysis. Dumbleton et al performed a meta-analysis of the literature concerning wear rates and osteolysis. They concluded that osteolysis was rarely observed when the wear rate was less than 0.1 mm per year. Sakalkale et al reported on 10 year follow up of 60 total hips performed with a cementless, tapered, circumferentially coated femoral stem. They reported no osteolysis of the femoral component even though there was a high incidence of acetabular osteolysis. Sochart et al reviewed 235 total hip arthroplasties performed by Charnley with 20 year follow-up. Osteolysis and revision was significantly associated with polyethylene wear rates. Average wear rates for hips that did not go on to revision was 0.09 mm per year compared to 0.19 mm per year for hips that were subsequently revised for loosening.
2.9
(39)
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