title: Long term survival of an hydroxyapatite-coated threaded cup in the presence of a high polythene wear rate.
abstract: 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 (0.24 mm/year). Our study demonstrates excellent survival of threaded HAC coated acetabular sockets at 10 years in spite of a relatively high polythene wear rate.
authors.affiliation: Department of Orthopaedics and Trauma, Dewsbury and District Hospital, Dewsbury, West Yorks, UK. datirsandeep@hotmail.com
authors.forename: Sandeep P
authors.initials: SP
authors.lastname: Datir
authors.forename: Peter D
authors.initials: PD
authors.lastname: Angus
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D013997:Time Factors; D055815:Young Adult
chemical_list: D020099:Coated Materials, Biocompatible; D020959:Polyethylene; D017886:Durapatite