title: Long-term results of alumina-on-alumina hip arthroplasty for osteonecrosis.
abstract: Alumina-on-alumina bearings in THR may, in theory, provide an effective answer to osteolysis in young patients with ON of the femoral head. The purpose of this retrospective study was to report the long-term results of a series of 52 consecutive alumina THAs (41 patients) done for ON. The mean age of the patients at surgery was 41 years (range, 22-79 years). Cemented femoral stems with a 32-mm alumina head were used. Plain alumina cups were used and were either cemented (39 hips) or press-fit (13 hips). No patients were lost to followup. Sixteen hips have been revised. Aseptic loosening of the socket was the main cause of failure. At an average 16-year followup (range, 11-23.65 years), 26 hips were rated excellent and one hip was rated good. No osteolysis was observed and wear was undetectable. If revision for aseptic loosening was the end point, the rate of survival was 88.5% at 10 years for the socket and 100% at 10 years for the stem. With the alumina-on-alumina hip replacement done for ON, absence of osteolysis can be expected for as many as 24 years after the operation. New methods of socket fixation now are being explored.
authors.affiliation: Department of Traumatology and Orthopaedic Surgery, Lariboisière Hospital, 2 rue Ambroise Paré, 75475 Paris Cedex 10, France. chrnich@club-internet.fr
authors.forename: Christophe
authors.initials: C
authors.lastname: Nich
authors.forename: El-Hadi
authors.initials: el-H
authors.lastname: Sariali
authors.forename: El-Hadi
authors.initials: el-H
authors.lastname: Sari Ali
authors.forename: Didier
authors.initials: D
authors.lastname: Hannouche
authors.forename: Rémy
authors.initials: R
authors.lastname: Nizard
authors.forename: Jacques
authors.initials: J
authors.lastname: Witvoet
authors.forename: Laurent
authors.initials: L
authors.lastname: Sedel
authors.forename: Pascal
authors.initials: P
authors.lastname: Bizot
mesh_terms: D000328:Adult; D000368:Aged; D000537:Aluminum Oxide; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005271:Femur Head Necrosis / Q000401:mortality / Q000601:surgery*; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D012086:Reoperation; D012189:Retrospective Studies; D015996:Survival Rate; D013997:Time Factors
chemical_list: D000537:Aluminum Oxide