title: Hip resurfacing arthroplasty at a non-specialist centre.
abstract: BACKGROUND
  Few studies have reported the outcome of hip resurfacing arthroplasty (HRA) with respect to implant characteristics from non-specialist centres. We report the survival, clinical and radiological outcomes of a single surgeon series of HRA with an average follow-up duration of five years.
  
  
  METHODS
  All consecutive HRAs performed by a single surgeon between 2003 and 2011 at a district general hospital were retrospectively examined clinically and radiologically.
  
  
  RESULTS
  A total of 85 patients underwent 109 HRAs (58 male [53.2%] and 51 female patients [46.8%]) with a mean follow-up period of 62 months (range: 12-102 months). The median age was 57 years (range: 25-75 years). The mean acetabular and femoral head component sizes were 54 mm (range: 48-64 mm) and 48 mm (range: 42-58 mm) respectively with a mean acetabular inclination angle of 42.9° (range: 20-75°). The survival rate was 95% with five revisions due to aseptic loosening (n=3) and fracture (n=2): these were predominantly for female patients (n=4), with significantly smaller mean acetabular (51 mm, p=0.04) and femoral (44 mm, p=0.02) implant sizes. Furthermore, they had a higher mean acetabular inclination angle of 48.1° (p=0.74). The mean Oxford hip score was 43.8 (range: 25-48) and the mean University of California Los Angeles (UCLA) activity score was 6.8 (range: 3-10). Radiological findings included heterotopic ossification in 13 (11.9%), radiolucent lines in 6 (5.5%), femoral neck thinning in 2 (1.8%) and femoral neck notching in 5 patients (4.6%).
  
  
  CONCLUSIONS
  We have shown that HRA at a non-specialist centre has short to medium-term outcomes comparable with those at specialist centres. HRA therefore remains a viable option although vigilance is required in case selection and follow-up according to national guidance.
authors.affiliation: Department of Trauma and Orthopaedic Surgery, Barnet and Chase Farm NHS Trust, Barnet, Hertfordshire, UK. niravpatel@doctors.org.uk.
authors.forename: N K
authors.initials: NK
authors.lastname: Patel
authors.forename: J
authors.initials: J
authors.lastname: Wright
authors.forename: S
authors.initials: S
authors.lastname: Sabharwal
authors.forename: A
authors.initials: A
authors.lastname: Afsharpad
authors.forename: R
authors.initials: R
authors.lastname: Bajekal
mesh_terms: D000077:Acetabulum; D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D006618:Hip Dislocation, Congenital / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D061825:Metal-on-Metal Joint Prostheses; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000209:etiology; D015207:Osteoarthritis, Hip / Q000601:surgery; D011182:Postoperative Care; D011475:Prosthesis Failure; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D016896:Treatment Outcome