title: Mid-term results of Copeland shoulder cementless surface replacement arthroplasty from an independent centre.
abstract: BACKGROUND
  The present study reports our experience of Copeland shoulder cementless surface replacement arthroplasty (CSRA) and whether glenoid microfracture influences the progression of glenoid erosion.
  
  
  METHODS
  One-hundred-and-twelve CSRAs were performed in 101 patients between 2002 and 2007. Eighty-three patients were alive at the median follow-up time of 72 months (range 9 to 121 months; interquartile range 46 to 93 months). Assessment included an Oxford shoulder score (OSS), patient satisfaction score and plain radiographs.
  
  
  RESULTS
  The mean (range) OSS was 27 (7 to 48) and 64 of 73 (87.7%) patients were 'very satisfied' or 'satisfied' with their shoulder. Twenty-three (20.5%) shoulders had over 2 mm of glenoid erosion. Microfracture was performed in 43 of 112 shoulders (38.4%) and did not influence the progression of glenoid erosion. Further surgery was performed in 27 (24.1%) shoulders, including 15 revisions, eight arthrolyses and four subacromial decompressions. Revision to total shoulder arthroplasty was performed in 14 : 10 for glenoid erosion; one each for loosening, periprosthetic fracture, deep infection, and chronic pain. One was revised to reverse arthroplasty for chronic pain.
  
  
  CONCLUSIONS
  CSRA performed in an independent centre reproduces the functional outcomes reported by the designer. Glenoid erosion, however, was a common occurrence and the main cause of revision - microfracture did not influence its progression.
authors: Warwick Orthopaedics, Shoulder and Elbow Unit, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK.
authors: Nicholas
authors: N
authors: Hwang
authors: Warwick Orthopaedics, Shoulder and Elbow Unit, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK.
authors: Chetan S
authors: CS
authors: Modi
authors: Warwick Orthopaedics, Shoulder and Elbow Unit, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK.
authors: Stephen J
authors: SJ
authors: Drew
authors: Warwick Orthopaedics, Shoulder and Elbow Unit, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK.
authors: Stephen M
authors: SM
authors: Turner
keywords: Copeland cementless shoulder resurfacing arthroplasty; glenoid erosion; glenoid microfracture; independent centre