Fig. 4
From: The study of screw placement parameters for Ogawa type I acromial fractures by 3D simulation
The measurement of distance L1, L2, L3, and L4. a The distances from the medial screw entry point to the acromioclavicular articular surface and the leading edge of the acromial were marked as L1 and L2, respectively. b The distances from the lateral screw entry point to the acromioclavicular articular surface and the leading edge of the acromial were marked as L3 and L4, respectively