title: Medium term review of the ASR implant system: A single surgeon series.
abstract: BACKGROUND
  Both ASR hip resurfacings and stemmed ASR XL arthroplasties have failed at high rates in several published series. We assessed a single surgeon series of these arthroplasties looking to identify factors associated with their failure.
  
  
  METHODS
  All surgeries were performed by one surgeon. Patients were evaluated clinically, radiologically and with serial cobalt and chromium ion analysis.
  
  
  RESULTS
  274 implants were analysed - 152 ASR resurfacings and 122 ASR XL implants. Thirty revisions were performed.
  
  
  CONCLUSIONS
  The failure rate of the ASR implant in our series is unacceptably high - its use in routine hip arthroplasty cannot be supported.
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Curtin
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: E
authors.initials: E
authors.lastname: Murphy
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: C
authors.initials: C
authors.lastname: Bryan
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: D
authors.initials: D
authors.lastname: Jadaan
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Jadaan
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: D
authors.initials: D
authors.lastname: Bergin
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: C G
authors.initials: CG
authors.lastname: Murphy
authors.affiliation: Department of Trauma and Orthopaedics, Galway University Hospitals, Galway, Ireland.
authors.forename: W
authors.initials: W
authors.lastname: Curtin
keywords: ASR; ASR, articular surface replacement hip system; Arthroplasty; Hip; Metal on metal; MoM, metal on metal; Revision