Fig. 3From: The largest secure corridor of the infra-acetabular screw—a 3-D axial perspective analysisThe measurement of Distance L1, L2 and L3. The red curve represented the arcuate line/pecten pubis. The vertical distance from the insertion point to the red curve was recorded as L1. The distances from the insertion point to eminelntia iliopectinea and pubic tubercle were recorded as L2 and L3, respectivelyBack to article page