Long Term Survival of an hydroxyapatite-Coated Threaded Cup in the Presence of a high Polythene Wear Rate. HIP International. 2010;20(3):327-334.

Long Term Survival of an hydroxyapatite-Coated Threaded Cup in the Presence of a high Polythene Wear Rate

Datir SP, Angus PD.
Hip

We describe the long term clinical results and polythene wear rate measurement of 144 uncemented total hip arthroplasties in 118 patients (Male: Female-65: 53, Mean age: 52.8 years (range 21–78 years) performed between 1988 and 2000 using the Furlong HAC coated threaded acetabular cup. The mean follow-up for the group was 10.2 years (range: 5–17.5, median: 9.7). One femoral stem and two acetabular shells were revised due to aseptic loosening. The mean polythene wear rate was 0.24 mm/year. Ten-year survival for the acetabular and femoral components with radiological evidence of aseptic loosening as an end point was 99.15 (CI: 98.3–99.9) and 99.28 (CI: 98.5–99.9). There was no evidence of osteolysis around the femoral or acetabular components in spite of a relatively high polythene wear rate (0.24mm/year). Our study demonstrates excellent survival of threaded HAC coated acetabular sockets at 10 years in spite of a relatively high polythene wear rate.


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