title: A randomized controlled trial comparing Oxinium and cobalt-chrome on standard and cross-linked polyethylene.
abstract: The purpose of the investigation was to assess the clinical and radiographic outcomes in four bearing surfaces. Eighty patients (91 hips) undergoing total hip arthroplasty between 2004 and 2007 were randomized to one of four bearing surfaces: (1) cobalt-chrome (CoCr) and ultra-high molecular weight polyethylene (UHMWPE); (2) CoCr and XLPE; (3) Oxinium and UHMWPE; and (4) Oxinium and XLPE. The mean follow-up for this study was 6.8 years. There were no significant differences in clinical outcomes. The linear wear rates for the four groups were 0.241 mm/year, 0.076 mm/year, 0.238 mm/year and 0.061 mm/year respectively. HXLPE results in significantly less wear than UHMWPE. However, we found no significant reduction in wear rate by using Oxinium in place of CoCr femoral heads at early follow-up.
authors: Division of Orthopaedic Surgery, St. Michael's Hospital, Toronto, Canada.
authors: Zachary A
authors: ZA
authors: Morison
authors: Department of Trauma and Orthopaedic Surgery, University Hospital of Coventry and Warwickshire, Coventry, United Kingdom.
authors: Sunit
authors: S
authors: Patil
authors: Division of Orthopaedic Surgery, St. Michael's Hospital, Toronto, Canada.
authors: Habeeb A
authors: HA
authors: Khan
authors: Division of Orthopaedic Surgery, St. Michael's Hospital, Toronto, Canada.
authors: Earl R
authors: ER
authors: Bogoch
authors: Division of Orthopaedic Surgery, St. Michael's Hospital, Toronto, Canada.
authors: Emil H
authors: EH
authors: Schemitsch
authors: Division of Orthopaedic Surgery, St. Michael's Hospital, Toronto, Canada.
authors: James P
authors: JP
authors: Waddell
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D002858:Chromium Alloys; D003035:Cobalt; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D061825:Metal-on-Metal Joint Prostheses; D008875:Middle Aged; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013499:Surface Properties; D016896:Treatment Outcome
chemical_list: D002858:Chromium Alloys; D011095:Polyethylenes; C111601:ultra-high molecular weight polyethylene; D003035:Cobalt
keywords: clinical outcomes; cross-linked polyethylene; oxidized zirconium; polyethylene wear; primary hip arthroplasty