title: Six-year experience with the Delta III reverse shoulder prosthesis.
abstract: OBJECTIVE
  To report the clinical and radiographic results and complications of the Delta III reverse prosthesis.
  
  
  METHODS
  24 women and 2 men aged 62 to 84 (mean, 75) years underwent total shoulder replacement using the Delta III reverse prosthesis. Patient diagnoses were massive rotator cuff tear (n=20), disabling sequelae of proximal humeral fractures (n=3), and failure of an unconstrained arthroplasty (n=3). Clinical and functional results were assessed using the Constant scale. Active range of motion (ROM) was measured. Scapular notching and radiolucent lines around the humeral component were evaluated using radiographs. Patient satisfaction of the treatment was evaluated by a direct interview.
  
  
  RESULTS
  23 patients were followed up for 26 to 84 (mean, 42) months. Two patients had loosening of the glenoid component (at 6 months and 5 years) and underwent revision surgery. There were no instances of infection, instability, or acromial fracture. Only active elevation improved significantly after surgery, as did both the absolute and adjusted Constant scores. 12 patients were completely pain-free, 9 complained of slight pain, and one of moderate pain. The severity of scapular notching progressed with time. 15 patients were satisfied with the treatment, 6 were partially satisfied, and 2 were not satisfied.
  
  
  CONCLUSIONS
  The Delta III prosthesis restores shoulder function but has biomechanical limits. Its use should be limited to elderly patients with severe impairment of the glenohumeral joint. Scapular notching is a main concern for the long-term survival of the implant.
authors.affiliation: Department of Orthopaedics and Traumatology, University of Insubria, Varese, Italy.
authors.forename: Federico Alberto
authors.initials: FA
authors.lastname: Grassi
authors.forename: Luigi
authors.initials: L
authors.lastname: Murena
authors.forename: Federico
authors.initials: F
authors.lastname: Valli
authors.forename: Riccardo
authors.initials: R
authors.lastname: Alberio
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement / Q000379:methods*; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D007593:Joint Instability / Q000000981:diagnostic imaging / Q000601:surgery; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011183:Postoperative Complications; D011475:Prosthesis Failure; D011859:Radiography; D016059:Range of Motion, Articular; D012086:Reoperation; D017006:Rotator Cuff / Q000000981:diagnostic imaging / Q000601:surgery; D000070636:Rotator Cuff Injuries; D012784:Shoulder Fractures / Q000000981:diagnostic imaging / Q000601:surgery; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome