The purpose of an SCR is to keep the humeral head centered on the glenoid.

• A. False
• B. Not related
• C. Only during surgery
• D. True

Answer: (D)

The main idea is that the graft in a superior capsular reconstruction serves as a static restraint to the humeral head, helping to prevent superior migration and keep the head centered on the glenoid. When a massive, irreparable rotator cuff tear disrupts the normal balance of forces, the humeral head tends to ride up toward the acromion, altering shoulder mechanics and reducing joint contact efficiency. Reconstructing the superior capsule with a graft restores that key restraint, re-centering the head during movement, improving deltoid function, contact pressures, and overall shoulder biomechanics. This effect is intended for long-term stability, not just during the surgical procedure.