Title: Acromioclavicular Joint Separation: Subacute Injuries and Arthroscopic Reconstruction With AC Dog Boneâ„¢ Button and Allograft Tissue Augmentation In this video, Peter J. Millett, MD (Vail, CO), demonstrates an arthroscopic AC joint reconstruction using AC Dog Boneâ„¢ button technology and allograft tendon augmentation.