Outcomes of staged bilateral reverse shoulder arthroplasties for rotator cuff tear arthropathy

Background: The purpose of this study was to evaluate outcomes in patients with rotator cuff tear arthropathy after staged bilateral reverse shoulder arthroplasties (RSAs) and to compare them with an age-, gender-, and diagnosis-matched control group with a unilateral RSA. Methods: We identified 11 patients with bilateral RSAs for rotator cuff tear arthropathy with a minimum of 2-year follow-up in a prospective shoulder arthroplasty registry. The bilateral group was matched to a control group of 19 patients with a unilateral RSA. Shoulder function scores, mobility, patient satisfaction, and activities of daily living were assessed preoperatively and at final follow-up. Results: There was no statistical difference between the first RSA or second RSA and the control group regarding age, gender, or follow-up. No group differences were noted preoperatively for shoulder function scores or mobility (P >.10). All groups significantly improved on all shoulder function scores (Constant score, American Shoulder and Elbow Surgeons score, Western Ontario Osteoarthritis of the Shoulder index, Single Assessment Numeric Evaluation score) and mobility at final follow-up (all P <.01). There were no significant differences in shoulder function scores or mobility between the first and second RSA in the bilateral group or between either shoulder in the bilateral group and the unilateral group (all P >. 10). Patient satisfaction improved and patients were successfully able to perform many important activities of daily living after bilateral RSAs. Conclusions: Patients with bilateral rotator cuff tear arthropathy can be advised that staged bilateral RSAs can be successful when indicated. Improvements in shoulder function scores, patient satisfaction, and mobility are possible for both the first RSA and the second RSA. (C) 2015 Journal of Shoulder and Elbow Surgery Board of Trustees.