The influence of anatomic total shoulder arthroplasty using a subscapularis tenotomy on shoulder strength

Total shoulder arthroplasty improved external rotation, liftoff, and bear-hug strength testing. Operative shoulder strength remained inferior to strength of the nonoperative shoulder. Patients with improvements in strength were more likely to have greater improvements in outcome scores and range of motion. Improvements in the shoulder activity level after anatomic total shoulder arthroplasty may be dependent on improvements in strength.