Reverse Shoulder Prosthesis With a Lateralized Glenosphere: Early Results of a Prospective Multicenter Study Stratified by Diagnosis

Background We report here on the results, stratified by diagnosis, of a multicenter prospective study by surgeons unaffiliated with the design team of reverse shoulder arthroplasty (RSA) performed using a lateralized glenosphere. We hypothesized that outcomes would be comparable to those reported previously. Methods : A total of 245 patients underwent RSA for cuff tear arthropathy or glenohumeral arthritis with rotator cuff tear, rotator cuff tear with instability or escape and without glenohumeral arthritis, or failed shoulder arthroplasty. Clinical, radiographic, and self-assessed outcome measures were obtained preoperatively and at standardized time points postoperatively. At 2 years, 173 patients were available as 23 patients were deceased, 12 had undergone revision, and 37 were unavailable. Results : Range of motion and outcomes improved, irrespective of diagnosis. Active forward flexion, abduction, and external rotation improved (73°–127°, 65°–109°, and 24°–37°, respectively, P