title: The effect of total hip arthroplasty cup design on polyethylene wear rate.
abstract: Using 743 total hip arthroplasties that included 6 hemispheric porous-coated cup designs, this study used a multiple linear regression to identify those factors that influenced polyethylene wear rates. Wear rates for each hip were based on serial head penetration measurement made with computer-assisted techniques. Implant factors associated with an increased wear rate included terminal sterilization with a non-cross-linking chemical surface treatment, a 4-mm lateralized liner, a cobalt-chrome femoral head, and a longer shelf life for liners gamma-irradiated in air. After accounting for these implant characteristics and patient factors, wear rates among the 6 cup designs were not significantly different (P = .89). Although polyethylene wear is frequently characterized for specific implant designs, this study demonstrated that there are several common factors that influence polyethylene wear rates.
authors.affiliation: Anderson Orthopaedic Research Institute, Alexandria, Virginia 22307, USA.
authors.forename: William G
authors.initials: WG
authors.lastname: Hamilton
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hopper
authors.forename: Stuart D
authors.initials: SD
authors.lastname: Ginn
authors.forename: Neil P
authors.initials: NP
authors.lastname: Hammell
authors.forename: C Anderson
authors.initials: CA
authors.lastname: Engh
authors.forename: Charles A
authors.initials: CA
authors.lastname: Engh
mesh_terms: D000077:Acetabulum; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design
chemical_list: D020959:Polyethylene