title: Failure of a novel ceramic-on-ceramic hip resurfacing prosthesis.
abstract: We report the early failure of five ceramic-on-ceramic hip resurfacings (CoCHRs). The ceramic used for the acetabular liner was a novel ceramic-composite (two thirds polyurethane and one third alumina ceramic). All cases were revised for increasing metal ion levels (blood cobalt 3.93-208.0 μg/l and chromium 1.57-17.5 μg/l) due to ceramic liner fracture and/or accelerated wear of the ceramic femoral head coating. Patients underwent bearing exchange and revision using primary hip arthroplasty implants at a mean of 3.0 years following CoCHR. Intraoperatively all patients had metallosis. At 1 to 2 years of follow-up blood metal ions normalized with no complications. We do not recommend this particular type of ceramic-on-ceramic bearing for hip resurfacing.
authors.affiliation: The Royal Orthopaedic Hospital, Northfield, Birmingham, B31 2AP, United Kingdom.
authors.forename: Gulraj S
authors.initials: GS
authors.lastname: Matharu
authors.affiliation: The McMinn Centre, 25 Highfield Road, Edgbaston, Birmingham, B15 3DP, United Kingdom.
authors.forename: Joseph
authors.initials: J
authors.lastname: Daniel
authors.affiliation: The McMinn Centre, 25 Highfield Road, Edgbaston, Birmingham, B15 3DP, United Kingdom.
authors.forename: Hena
authors.initials: H
authors.lastname: Ziaee
authors.affiliation: The McMinn Centre, 25 Highfield Road, Edgbaston, Birmingham, B15 3DP, United Kingdom.
authors.forename: Derek J W
authors.initials: DJ
authors.lastname: McMinn
mesh_terms: D000328:Adult; D000537:Aluminum Oxide; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D001672:Biocompatible Materials; D002516:Ceramics; D002857:Chromium / Q000097:blood; D003035:Cobalt / Q000097:blood; D003343:Corrosion; D005260:Female; D000075322:Heavy Metal Poisoning; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D019216:Metals, Heavy / Q000097:blood; D008875:Middle Aged; D011041:Poisoning / Q000097:blood / Q000209:etiology; D011475:Prosthesis Failure
chemical_list: D001672:Biocompatible Materials; D019216:Metals, Heavy; D002857:Chromium; D003035:Cobalt; D000537:Aluminum Oxide
keywords: ceramic-on-ceramic; fracture; hip resurfacing; metal ions; revision arthroplasty