title: Cementless Metasul metal-on-metal total hip arthroplasties at 13 years.
abstract: Second-generation metal-on-metal bearings have been used since the late 1980s as alternative bearings to eliminate aseptic loosening due to polyethylene wear. The aim of the present study was to evaluate the long-term results of a series of Metasul (Zimmer GmbH, Winterthur, Switzerland) metal-on-metal total hip arthroplasty (THA). One hundred forty-nine cementless THAs with a 28-mm Metasul articulation were performed in 111 consecutive patients. The results were retrospectively reviewed at 13 years postoperatively. Clinical and radiographic evaluations and implant survivorship were performed. Seven hips (4.7%) were revised. The overall survivorship with revision for any reason as the end point was 0.94. The average Harris hip score was 91.4. Expansive osteolysis was found adjacent to the stem in 4 hips. Metal wear-related aseptic loosening was not the major reason for failure in our Metasul metal-on-metal THAs. Recurrent dislocation was the main reason for revision in our series.
authors.affiliation: Divisione Ortopedia II, IRCCS Policlinico San Donato, 20097 San Donato Milanese, Milan, Italy.
authors.forename: Filippo
authors.initials: F
authors.lastname: Randelli
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Banci
authors.forename: Alessandro
authors.initials: A
authors.lastname: D'Anna
authors.forename: Ornella
authors.initials: O
authors.lastname: Visentin
authors.forename: Gianni
authors.initials: G
authors.lastname: Randelli
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D005260:Female; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D015994:Incidence; D004204:Joint Dislocations; D008137:Longitudinal Studies; D008297:Male; D008670:Metals; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D008670:Metals