title: Total elbow arthroplasty after interposition arthroplasty for elbow arthritis.
abstract: BACKGROUND
  Interposition arthroplasty is an option for the treatment of arthritis of the elbow. Conversion to a total elbow arthroplasty can be considered later, when the patient reaches a suitable age. We investigated the results of conversion of an interpositional elbow arthroplasty to a semiconstrained total elbow arthroplasty in a series of patients.
  
  
  METHODS
  The results of twelve consecutive linked semiconstrained total elbow arthroplasties in twelve patients who had had a prior interposition arthroplasty for the treatment of degenerative arthritis of the elbow were evaluated at an average of ten years postoperatively. The average age at the time of the total elbow arthroplasty was fifty years, and the average interval from the interposition arthroplasty to the total elbow arthroplasty was 9.9 years. Pain and elbow performance as measured with the Mayo Elbow Performance Score were assessed in a retrospective chart review and an evaluation of questionnaires, and postoperative radiographs were reviewed.
  
  
  RESULTS
  At the time of the latest follow-up, postoperative pain was rated as mild or none in ten of the twelve patients, and the result was rated as subjectively satisfactory in ten patients. The average Mayo Elbow Performance Score improved from 32.1 points (range, 10 to 70 points) preoperatively to 80.4 points (range, 40 to 100 points) postoperatively (p < 0.001). According to these objective criteria, there were three excellent, six good, one fair, and two poor results. All of the elbows were stable following the arthroplasty. Radiographs demonstrated a well-fixed prosthesis in all but one patient who had extensive osteolysis at the site of the humeral component. One other patient had radiographic evidence of bushing wear. Both of these patients required revision procedures.
  
  
  CONCLUSIONS
  Semiconstrained total elbow arthroplasty can be performed successfully in patients with a prior interposition arthroplasty. Reliable pain relief and a satisfactory result can be achieved in most patients.
authors.affiliation: Department of Orthopaedics, Mayo Clinic, Rochester, Minnesota 55905, USA.
authors.forename: Theodore A
authors.initials: TA
authors.lastname: Blaine
authors.forename: Robert
authors.initials: R
authors.lastname: Adams
authors.forename: Bernard F
authors.initials: BF
authors.lastname: Morrey
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001168:Arthritis / Q000000981:diagnostic imaging / Q000601:surgery*; D019643:Arthroplasty, Replacement; D004551:Elbow Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome