title: Revision reverse shoulder arthroplasty for glenoid baseplate failure after primary reverse shoulder arthroplasty.
abstract: BACKGROUND
  The aim of this study is to document a single surgeon's experience performing revision reverse shoulder arthroplasty after baseplate failure.
  
  
  METHODS
  Revision reverse shoulder arthroplasty (RSA) for mechanical failure of the glenoid baseplate after RSA was performed in 14 patients. Clinical and radiographic data were collected preoperatively, prior to baseplate failure, after baseplate failure, and at latest follow-up after revision (average, 33 months).
  
  
  RESULTS
  When comparing the pre-operative values to post-revision, ASES, forward elevation, and abduction were significantly improved. There was no significant difference in any of the outcome measures when comparing the prefailure data to the post-revision data. The post-revision prosthesis-scapular neck angle (PSNA) showed a significant increase in inferior tilt of the baseplate when compared to pre-failure PSNA (P < .001). Two patients (14%) required a second revision RSA for glenoid baseplate failure (1) and dislocation (1); 1 additional patient developed a postoperative hematoma which resolved without surgery.
  
  
  CONCLUSIONS
  Revision RSA for the treatment of glenoid baseplate mechanical failure can restore pain relief and function to the levels gained after the index RSA.
authors.affiliation: Shoulder & Elbow Division, Florida Orthopaedic Institute, Tampa, FL 33637, USA.
authors.forename: Jason O
authors.initials: JO
authors.lastname: Holcomb
authors.forename: Derek
authors.initials: D
authors.lastname: Cuff
authors.forename: Steve A
authors.initials: SA
authors.lastname: Petersen
authors.forename: Derek R
authors.initials: DR
authors.lastname: Pupello
authors.forename: Mark A
authors.initials: MA
authors.lastname: Frankle
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement / Q000009:adverse effects* / Q000379:methods*; D001860:Bone Plates; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D017060:Patient Satisfaction; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011788:Quality of Life; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology*; D020127:Recovery of Function; D012086:Reoperation / Q000379:methods; D012189:Retrospective Studies; D018570:Risk Assessment; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome