title: Resurfacing hemiarthroplasty compared to stemmed hemiarthroplasty for glenohumeral osteoarthritis: a randomised clinical trial.
abstract: OBJECTIVE
  The aim of this study was to conduct a randomised, clinical trial comparing stemmed hemiarthroplasty and resurfacing hemiarthroplasty in the treatment of glenohumeral osteoarthritis.
  
  
  METHODS
  A total of 40 shoulders (35 patients) were randomised to stemmed hemiarthroplasty or resurfacing hemiarthroplasty and evaluated three and 12 months postoperatively using the Constant-Murley score (CMS) and Western Ontario Osteoarthritis of the Shoulder (WOOS) index.
  
  
  RESULTS
  There were no statistically significant differences in age, gender or pre-operative scores except for WOOS at baseline. Two patients were lost to follow-up. Significant improvements in CMS and WOOS were observed at one year after both arthroplasty designs. At one year, the mean CMS was 48.9 (range 6-80) after resurfacing hemiarthroplasty and 59.1 (range 0-88) after stemmed hemiarthroplasty {mean difference 10.2 [95 % confidence interval (CI) -3.3 to 23.6], P = 0.14}. The mean WOOS was 59.2 (range 5.2-100.0) and 79.4 (range 12.8-98.6), respectively [mean difference 20.2 (95 % CI 3.4-36.9), P = 0.02]. No major complications occurred and there were no revisions.
  
  
  CONCLUSIONS
  The effects of resurfacing hemiarthroplasty tended to be inferior to those of stemmed hemiarthroplasty. It is unclear whether this reflects a real difference in effect or baseline differences due to the limited number of randomised patients. We suggest there is a need for a larger, more definitive trial.
authors.affiliation: Department of Orthopaedic Surgery, Herlev University Hospital, Herlev Ringvej 75, 2730, Herlev, Denmark, jevera01@heh.regionh.dk.
authors.forename: Jeppe V
authors.initials: JV
authors.lastname: Rasmussen
authors.forename: Bo S
authors.initials: BS
authors.lastname: Olsen
authors.forename: Anne Kathrine
authors.initials: AK
authors.lastname: Sorensen
authors.forename: Asbjørn
authors.initials: A
authors.lastname: Hróbjartsson
authors.forename: Stig
authors.initials: S
authors.lastname: Brorson
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D062785:Hemiarthroplasty / Q000379:methods*; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery*; D010147:Pain Measurement; D011788:Quality of Life; D016059:Range of Motion, Articular; D012785:Shoulder Joint / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome