title: Analysis of complications of reverse total shoulder arthroplasty.
abstract: OBJECTIVE
  the aim of this study was to analyze complications of reverse total shoulder arthroplasty (RTSA) used to treat different shoulder diseases.
  
  
  METHODS
  from March 2000 to March 2013, 195 RTSA were implanted by the senior Author. The indications for reverse prosthesis surgery were secondary osteoarthritis (OA) in 49 cases, irreparable rotator cuff tear (RCT) in 48 cases, and complex humeral fractures in 75 cases, while 19 were patients requiring surgical revision for first prosthesis implant. We used different prostheses with different designs.
  
  
  RESULTS
  the clinical and radiological results of all the patients were analyzed retrospectively at an average follow-up of 7 years. The cases were divided into four groups on the basis of the diagnosis and complications were classified as perioperative, postoperative, or late. The mean total Constant score improved from 28 to 69 points in the OA group; from 21 to 70.8 points in the irreparable RCT group, to 76.4 in the fracture group, and from 16.6 to 59.8 points in the revision group. Scapular notching was observed in 59 cases (30.2%). Thirty-three other complications (16.9%) were observed, namely: hematomas (n=3), instability of the humeral component (n=1), scapular spine fractures (n=2), ulnar nerve deficit (n=2), long thoracic nerve palsy (n=2), deep infections (n=2), periprosthetic fractures (n=6), glenoid fractures (n=2), implant loosening (n=2), anterior deltoid muscle deficiency (n=2) and periarticular heterotopic calcifications (n=9).
  
  
  CONCLUSIONS
  the rates of complications, especially fractures, reported in the present study were lower than those reported in the current literature.
  
  
  METHODS
  Level IV, therapeutic case series.
authors.affiliation: Ospedale dei Pellegrini, Naples, Italy.
authors.forename: Raffaele
authors.initials: R
authors.lastname: Russo
authors.affiliation: Department of Orthopaedics, Ruesch Clinic, Naples, Italy.
authors.forename: Giuseppe Della
authors.initials: GD
authors.lastname: Rotonda
authors.affiliation: Ospedale dei Pellegrini, Naples, Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Ciccarelli
authors.affiliation: Ospedale dei Pellegrini, Naples, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Cautiero
keywords: complications; results; reverse shoulder prosthesis; surgical technique