The authors followed 518 shoulders having total shoulder arthroplasty. They defined 'secondary rotator cuff dysfunction' as superior subluxation of the humeral head on the glenoid revealed by anteroposterior radiographs evaluated by observers blinded to the clinical data. The incidence of this finding was 16% at 10 years after surgery and 55% at 15 years. Shoulders with this finding had worse comfort and function as well as a greater risk of glenoid component failure. Shoulders with preoperative fatty infiltration of the infraspinatus and shoulders having glenoid components inserted with a superior tilt have an increased risk of secondary cuff dysfunction. Read More...
