title: Cementless hemispheric hydroxyapatite-coated sockets for acetabular revision.
abstract: This study describes our experience with a hydroxyapatite-coated uncemented hemispherical component used for revision of 72 patients with aseptic loosening of the acetabular component. Preoperative Paprosky classification of the acetabular defects was 1 type I, 35 type II, and 36 type III; according to American Academy of Orthopaedic Surgeons, 14 segmental, 10 cavitary, and 48 combined. The mean follow-up was 7.6 years (range, 5.0-13.0). Complications were seen in 7 cases (9.6%). Seventy acetabular components (97.2%) showed bone ongrowth on the radiographs. The survival rate was 90.8% after a mean follow-up of 7.6 years (range, 5.0-13.0) when revision for any reason is the end point (confidence interval, 80.5%-100%) and 98.1% (confidence interval, 94.5%-100%) when aseptic loosening of the cup is the end point. We conclude that hydroxyapatite-coated cups for acetabular revision show promising results.
authors.affiliation: Department of Orthopaedic Surgery and Traumatology, Atrium Medical Centre, CX Heerlen, The Netherlands.
authors.forename: Carel H
authors.initials: CH
authors.lastname: Geerdink
authors.forename: Jelle
authors.initials: J
authors.lastname: Schaafsma
authors.forename: Will G M
authors.initials: WG
authors.lastname: Meyers
authors.forename: Bernd
authors.initials: B
authors.lastname: Grimm
authors.forename: Alphons J
authors.initials: AJ
authors.lastname: Tonino
mesh_terms: D000077:Acetabulum / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D001672:Biocompatible Materials; D017886:Durapatite; D006622:Hip Prosthesis; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation
chemical_list: D001672:Biocompatible Materials; D017886:Durapatite