title: Disassembly of the osteonics bipolar ring when used with a Howmedica femoral head. A report of four cases.
abstract: In 1980 Osteonics marketed their universal head replacement (UHR) as a universal head to fit 32 mm heads. The authors present four cases of ring disassociation in the Osteonics UHR when combined with Howmedica femoral heads.
authors.affiliation: Western Orthopaedic Group, P.C., Denver, Colorado.
authors.forename: J C
authors.initials: JC
authors.lastname: Holmes
authors.forename: N J
authors.initials: NJ
authors.lastname: Whalen
mesh_terms: D000368:Aged; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation