e508 Lower Trapezius Transfer (LTT) Performed at the Time of Reverse Shoulder Arthroplasty (RSA) with an Allograft-Prosthetic Composite (APC) Can Restore Active External Rotation in Shoulders with Posterosuperior Cuff Deficiency and Humeral Bone Loss

Posterosuperior Irreparable Tear (8 minutes): The arthroscopic assisted lower trapezius transfer to reconstruct irreparable supraspinatus and infraspinatus tears