title: Prospective randomized trial comparing alumina ceramic-on-ceramic with ceramic-on-conventional polyethylene bearings in total hip arthroplasty.
abstract: This prospective randomized study aims to compare the outcome between an alumina ceramic-on-ceramic (CC) articulation with a ceramic on ultra-high-molecular-weight polyethylene articulation (CP). Fifty-six hips in 55 patients with mean age 42.2 (range, 19-56) each received uncemented components, a 28-mm alumina head with randomization of acetabular liner. Mean St Michael's outcome score for each group with up to 10 years follow-up (median, 8 years; range, 1-10) was 22.8 and 22.9, respectively (P = .819). Wear was identified in all but 1 CP replacement, but only 12 of the 23 CC. Mean wear in the CP group was 0.11 mm/y and 0.02 mm/yr in the CC group (P < .001). Other than significantly greater wear in the polyethylene group, there was no significant difference in midterm outcome between the 2 groups.
authors.affiliation: Division of Orthopaedics, Department of Surgery, St Michael's Hospital, Toronto, Ontario, Canada.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Lewis
authors.forename: Ali
authors.initials: A
authors.lastname: Al-Belooshi
authors.forename: Michael
authors.initials: M
authors.lastname: Olsen
authors.forename: Emil H
authors.initials: EH
authors.lastname: Schemitch
authors.forename: James P
authors.initials: JP
authors.lastname: Waddell
mesh_terms: D000328:Adult; D000537:Aluminum Oxide; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D001848:Bone Diseases, Developmental / Q000601:surgery*; D002516:Ceramics; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D010020:Osteonecrosis / Q000601:surgery; D020959:Polyethylene; D011446:Prospective Studies; D011859:Radiography; D016896:Treatment Outcome
chemical_list: D020959:Polyethylene; D000537:Aluminum Oxide