e421 Lower Trapezius Tendon Transfer Improves Range of Motion, Function, and Restores External Rotation in Patients with a Massive, Irreparable, Posterosuperior Rotator Cuff Tear

e422 Mental Health Disorders and Pain Modulation in Orthopaedic Shoulder Patients

e423 Operative and Nonosurgical Treatment of Periprosthetic Humerus Fractures after Shoulder Arthroplasty: A Systematic Review and Meta-Analysis

e424 Worse Postoperative Outcomes and Higher Reoperation in Smokers Compared to Nonsmokers for Arthroscopic Rotator Cuff Repair

e425 Revision Rotator Cuff Repair: Can a Sugaya 3 Tendon Considered to Be Healed or Not?