William P Polio, Blake Hajek, Tyler J Brolin, William M Mihalko, Kunal Singhal, Shannon Hughes, Alexis Nelson, Tristan Hayes, Chi-Yang Chiu, David L Bernholt, Frederick M Azar, Thomas W Throckmorton
BACKGROUND: Preoperative teres minor insufficiency has been identified as a risk for poor restoration of external rotation (ER) after reverse shoulder arthroplasty (RTSA). However, there has been little investigation regarding muscle-activation patterns generating ER. This prospective study sought to determine timing and activation levels of shoulder-girdle musculature during ER in well-functioning RTSAs with an intact teres minor utilizing a lateralized design. METHODS: Patients at least 1-year from RTSA with functional ER, American Shoulder and Elbow Surgeons (ASES) score >70, superior rotator cuff deficiency, and intact teres minor were identified...
September 29, 2023: Journal of Shoulder and Elbow Surgery