title: Differences in highly cross-linked polyethylene wear between zirconia and cobalt-chromium femoral heads in Japanese patients: a prospective, randomized study.
abstract: The purpose of this study was to compare highly cross-linked polyethylene wear between the zirconia head and the cobalt-chromium head in Japanese patients. A prospective, randomized study was performed to evaluate the outcomes in 32 hips that had zirconia heads and in 30 hips that had cobalt-chromium heads. The mean follow-up periods of both groups were same (5 years). There were no significant differences between the zirconia head and the cobalt-chromium head in the mean polyethylene linear wear per year and the mean volumetric polyethylene wear per year in the steady phase. This study indicates that zirconia head offers no benefits over metal head in terms of wear reduction at 5 years in Japanese patients who have lightweight and thin polyethylene liners.
authors.affiliation: Department of Orthopaedic Surgery, Nara Medical University, Kashihara, Nara, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Kawate
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Ohmura
authors.forename: Ikuo
authors.initials: I
authors.lastname: Kawahara
authors.forename: Katsuya
authors.initials: K
authors.lastname: Tamai
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Ueha
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takemura
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D044466:Asian People; D001672:Biocompatible Materials; D002857:Chromium; D003035:Cobalt; D005260:Female; D005270:Femur Head / Q000601:surgery*; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D011446:Prospective Studies; D011475:Prosthesis Failure; D015040:Zirconium
chemical_list: D001672:Biocompatible Materials; D002857:Chromium; D003035:Cobalt; D020959:Polyethylene; D015040:Zirconium