Semiconstrained total shoulder arthroplasty for glenohumeral arthritis andmassive rotator cuff tearing

Each of 6 patients (7 shoulders) underwent semi-constrained total shoulder arthroplasty for glenohumeral arthritis, subluxation, and extensive rotator cuff tearing to obtain a more balanced joint and achieve consistent pain r elief. A hooded glenoid component (Neer 600%) was used to contain the humer al head within the joint. Patients were followed for an average of 69 month s (range, 26-125 months) or to revision surgery and were assessed clinicall y and radiographically. All patients experienced improvement with respect t o pain; on average, active elevation and external rotation decreased to 44 degrees and 43 degrees. On radiographic evaluation, 3 of the glenoid compon ents were seen to have complete radiolucent lines and I case showed a shift in component position. Five shoulders had anterior-superior joint subluxat ion. According to the shoulder score rating system of Neer, all but 1 of th e shoulders were rated as unsatisfactory or unsuccessful at final Follow-up . Two patients have undergone revision surgery for subluxation or glenoid l oosening. We cannot recommend this method of treatment.