title: Outcomes for a large metaphyseal volume hemiarthroplasty in complex fractures of the proximal humerus.
abstract: BACKGROUND
  A large metaphyseal volume shoulder hemiarthroplasty has been in use within our department since 2008; however, no clinical outcome data are available for this prosthesis apart from the designer surgeon series.
  
  
  METHODS
  During a 5-year period, data were collected for 40 patients (30 women, 10 men) treated consecutively with the Zimmer Anatomical Shoulder Fracture hemiarthroplasty system (Zimmer, Warsaw, IN, USA).
  
  
  RESULTS
  The final analysis included 26 patients. The median age was 79 years (range, 58-91 years), and the median follow-up was 3.7 years (range, 2.0-5.8 years). The median Constant Score was 34 points (range, 16-70 points), and the median Oxford Shoulder Score was 27 points (range, 5-46 points). The greater tuberosity healed satisfactorily in 12 patients. Resorption of the greater tuberosity was seen radiologically in 18 patients. The presence of resorption had no significant effect on the Constant Score (P = .264) or the Oxford Shoulder Score (P = .469). Three patients (12%) required revision.
  
  
  CONCLUSIONS
  This is the first report from a nondesigner center for outcomes for this prosthesis to date. The results demonstrate reduced functional performance compared with the designer series.
authors.affiliation: Department of Trauma and Orthopaedics, Royal Derby Hospital, Derby, UK. Electronic address: jonathan.white1@nhs.net.
authors.forename: Jonathan J E
authors.initials: JJ
authors.lastname: White
authors.affiliation: Department of Trauma and Orthopaedics, Royal Derby Hospital, Derby, UK.
authors.forename: John R
authors.initials: JR
authors.lastname: Soothill
authors.affiliation: Department of Trauma and Orthopaedics, Royal Derby Hospital, Derby, UK.
authors.forename: Marie
authors.initials: M
authors.lastname: Morgan
authors.affiliation: Department of Trauma and Orthopaedics, Royal Derby Hospital, Derby, UK.
authors.forename: David I
authors.initials: DI
authors.lastname: Clark
authors.affiliation: Department of Trauma and Orthopaedics, Royal Derby Hospital, Derby, UK.
authors.forename: Marius P
authors.initials: MP
authors.lastname: Espag
authors.affiliation: Department of Trauma and Orthopaedics, Royal Derby Hospital, Derby, UK.
authors.forename: Amol A
authors.initials: AA
authors.lastname: Tambe
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001862:Bone Resorption / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D017102:Fracture Healing; D062785:Hemiarthroplasty / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011474:Prosthesis Design; D012189:Retrospective Studies; D012784:Shoulder Fractures / Q000601:surgery*; D000072227:Shoulder Prosthesis
keywords: Shoulder; Zimmer; fracture; hemiarthroplasty; humerus; trauma