This document discusses the classification and treatment of acromioclavicular joint injuries. It describes the Tossy and Rockwood classification systems for grading AC joint sprains and ruptures. Surgical treatment options are presented, including K-wires, Bosworth screws, ligament reconstruction grafts, clavicle plates, and tightrope methods. Post-operative rehabilitation is outlined, recommending immobilization for two weeks followed by restricted motion and avoidance of heavy lifting for up to three months. The document notes two cases of system rupture in the literature and potential esthetic issues for some female patients.