title: Uncemented versus cemented humeral stem fixation in reverse shoulder arthroplasty.
abstract: OBJECTIVE
  This study compares the radiographic and functional outcomes of uncemented and cemented humeral fixation in reverse total shoulder arthroplasty (RTSA).
  
  
  METHODS
  A prospective research database was reviewed for RTSA patients from 2007 to 2010. Inclusion criteria were primary RTSA from one manufacturer (Exactech Equinoxe®) with a grit-blasted metaphyseal humeral stem and two year minimum follow-up. Exclusion criteria included shoulder arthroplasty for fractures, fracture sequelae or inflammatory arthropathy. Radiographic and functional outcomes were compared between the uncemented and cemented groups.
  
  
  RESULTS
  A total of 97 patients (58 women, 39 men) with 100 RTSAs met the inclusion criteria. Radiographic and clinical two year follow-up was available in 80 % (51 RTSAs) of the uncemented group and 89 % (32 RTSAs) of the cemented group (mean follow-up 3.5 years). Average age at surgery was 72 years. Both groups showed significant improvements in the 12-item Simple Shoulder Test (SST-12), 12-item Short Form (SF-12), Shoulder Pain and Disability Index 130 (SPADI-130), American Society of Shoulder and Elbow Surgeons (ASES) score and normalised Constant scores. One humeral loosening was seen in each group (2 % uncemented, 3 % cemented). Both groups' overall component revision rate was 6 % (one in each group relating to humeral component failure). There were no significant differences in complication rates, change in functional scores and range of motion improvement.
  
  
  CONCLUSIONS
  Humeral component press-fitting in RTSA provides similar outcomes as cementation at a minimum two year follow-up.
authors.affiliation: Department of Orthopaedics and Rehabilitation, University of Florida, 3450 Hull Road, 3rd Floor, Gainesville, FL, 32608, USA, kingjj@ortho.ufl.edu.
authors.forename: Joseph J
authors.initials: JJ
authors.lastname: King
authors.forename: Kevin W
authors.initials: KW
authors.lastname: Farmer
authors.forename: Aimee M
authors.initials: AM
authors.lastname: Struk
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Wright
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement / Q000379:methods*; D002484:Cementation; D005260:Female; D006801:Humans; D006811:Humerus / Q000601:surgery; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011446:Prospective Studies; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012086:Reoperation; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D020069:Shoulder Pain / Q000601:surgery; D016896:Treatment Outcome