Which abduction range is recommended for SCR when using a tension-graft?

• A. 0-10 degrees
• B. 30-40 degrees
• C. 20-30 degrees
• D. 40-50 degrees

Answer: (C)

During SCR with a tension-graft, the abduction angle at which the graft is fixed sets its tension and how effectively it resists superior migration of the humeral head. The 20 to 30 degrees range provides the right amount of tension: enough to centralize the humeral head and restore subacromial spacing, while avoiding over-tensioning that could limit motion or stress the graft and anchors. Fixing at too little abduction risks inadequate restraint of superior translation, whereas fixing at too much abduction can over-constrain the joint, limit range of motion, and increase the risk of graft failure. Hence, 20-30 degrees is the optimal window for SCR using a tension-graft.