title: Advanced wear of an Oxinium™ femoral head implant following polyethylene liner dislocation.
abstract: Oxinium™ (Smith & Nephew, Memphis, TN, US) has been used in hip arthroplasty since 2003. The surface coating is hard and provides low wear rates but if this surface coating is damaged, the soft metal core is at risk of accelerated wear. Previous reports have described accelerated wear following intra and postoperative hip dislocation. We report a case of advanced wear of an in situ Oxinium™ femoral head implant following a cracked acetabular liner. The liner had disengaged from the titanium shell, allowing the Oxinium™ head to articulate directly with the shell. The disengaged liner led to dislocation of the Oxinium™ head, with associated pronounced wear of the head and the acetabular cup. The patient had a successful revision procedure. We advise close follow-up of patients with Oxinium™ implants, especially if associated with dislocation and closed reduction.
authors.affiliation: Royal National Orthopaedic Hospital NHS Trust, UK. Flat 2 Goldsborough House, Wandsworth Road, London SW8 2RN, UK. howardtribe@doctors.org.uk.
authors.forename: H
authors.initials: H
authors.lastname: Tribe
authors.forename: S
authors.initials: S
authors.lastname: Malek
authors.forename: J
authors.initials: J
authors.lastname: Stammers
authors.forename: V
authors.initials: V
authors.lastname: Ranawat
authors.forename: J A
authors.initials: JA
authors.lastname: Skinner
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D061825:Metal-on-Metal Joint Prostheses / Q000009:adverse effects; D008875:Middle Aged; D010149:Postoperative Pain / Q000209:etiology; D020959:Polyethylene / Q000009:adverse effects; D011475:Prosthesis Failure / Q000209:etiology*; D012086:Reoperation; D014657:Vasculitis / Q000209:etiology
chemical_list: D020959:Polyethylene