title: Revision shoulder arthroplasty: an analysis of indications and outcomes.
abstract: BACKGROUND
  We reviewed all revision operations performed by a single surgeon on previous hemi- and total shoulder arthroplasties from November 1987 to March 2005.
  
  
  METHODS
  Thirty-five patients' charts were reviewed to determine the causes of failures. In addition, their outcomes after the revision surgery were analyzed.
  
  
  RESULTS
  Overall, results were satisfactory in 71% by Neer criteria at a mean follow-up of 27.6 months. Outcomes were related to reason for failure. When failure was because of glenoid erosion, loosening, or humeral loosening, the mean improvement in forward elevation (FE) (28.9 degrees ) and external rotation (ER) (16.1 degrees ) was significantly better (P=.024 FE; P=.000 ER) than when the failure was because of infection, soft-tissue problems, or pain of undetermined origin (FE=-5.6 degrees ; ER=-6.8 degrees ).Likewise, UCLA scores in the first group were significantly better than in the second group (P=.003). In the first group, 16/18 patients were satisfied, while in the second group only 4/17 were satisfied.
  
  
  CONCLUSIONS
  Our data suggest that patients whose revisions are because of glenoid erosion or component loosening can expect to have better outcomes than those whose revisions are performed for infection, instability, or other soft-tissue problems.
authors.affiliation: Kentucky Bone & Joint Surgeons, Lexington, KY40504, USA. krsajadi@hotmail.com
authors.forename: Kaveh R
authors.initials: KR
authors.lastname: Sajadi
authors.forename: Young W
authors.initials: YW
authors.lastname: Kwon
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Zuckerman
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D019643:Arthroplasty, Replacement / Q000009:adverse effects / Q000379:methods*; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000601:surgery*; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011336:Probability; D011475:Prosthesis Failure; D016059:Range of Motion, Articular / Q000502:physiology; D012086:Reoperation / Q000379:methods; D012189:Retrospective Studies; D018570:Risk Assessment; D012785:Shoulder Joint / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome