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Typical case in the MMSS group. (a) Two-part fracture of the surgical neck in a 59-year-old female (left). (b) Immediate postoperative AP X-ray showed no anatomic reduction of the medial cortex. However, two medial support screws were used in this case (arrow). The NSA was 126°. (c) Six months postoperatively the humeral head alignment was well maintained, and the fracture healed. MMSS: Medial multiscrew support group; AP: Anteroposterior; NSA: Neck-shaft angle.
