title: Hylamer wear rates and shelf life: a clinical correlation.
abstract: We evaluated the performance of 84 Hylamer polyethylene components and zirconia modular femoral heads which were implanted in a single institution over a 5 year period. Patients were followed up for a mean of 6.2 years. The mean rate of penetration was 0.58 mm/year (0.05-1.0). Lot/batch numbers were available in the clinical case notes of 54 patients. Using the lot/batch numbers, we were able to determine the Hylamer cups' shelf lifes. We found that liners with a shelf life greater than 10 months had a significantly greater linear wear (0.38 mm/year) than those implanted in less than 10 months (0.05 mm/year).
authors.affiliation: Department of Orthopaedic Surgery, The Adelaide and Meath Hospital, Tallaght, Dublin 24, Ireland.
authors.forename: Paul D
authors.initials: PD
authors.lastname: Kiely
authors.forename: James A
authors.initials: JA
authors.lastname: Harty
authors.forename: John P
authors.initials: JP
authors.lastname: McElwain
mesh_terms: D000077:Acetabulum; D000293:Adolescent; D000328:Adult; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008970:Molecular Weight; D020959:Polyethylene; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies
chemical_list: D020959:Polyethylene