406 Nicotinamide Phosphoribosyltransferase-improved Mitochondrial Function Prevents Aging-Related Degenerative Rotator Cuff Tendinopathy and Postoperative Retear

407 Reproducibility Analysis of Classifications for Fractures of the Proximal Humerus when assisted by Additive Manufacturing (3D Models)

408 Outcomes of Total Shoulder Arthroplasty for Inflammatory Arthritis Versus Osteoarthritis: A Nationwide Matched Cohort Analysis from 2016-2020