The neck-shaft angle is the key factor for the positioning of calcar screw when treating proximal humeral fractures with a locking plate.

The neck-shaft angle is the key factor for the appropriate positioning of calcar screws when treating a proximal humeral fracture with a locking plate. We recommend reducing the angle to between 130° and 150°. Cite this article: Bone Joint J 2020;102-B(12):1629-1635.