Changes in rotator cuff muscle length after reverse shoulder arthroplasty with balanced glenoid and humeral lateralization

A cadaver model was utilized to determine operating muscle lengths of the infraspinatus, teres minor, and subscapularis through the internal-external rotation range of motion before and after implantation of reverse shoulder arthroplasty (RSA) components with a lateralized glenosphere. All three muscles show increased minimal and maximal lengths and an increased total excursion following RSA