The largest secure corridor of the infra-acetabular screw—a 3-D axial perspective analysis

摘要

Find the largest screw path. A The 3D model was turned to the axial perspective to find the largest translucent area. B The outline of this translucent area (marked in red) represented the overlaying cortical bone, like a drop of water. C A virtual screw was placed in the centre of the tear-drop area. Then, the diameter was increased progressively until it reached the borderline of the area (the yellow circle of the cylinder represents the largest screw)