Fig. 7From: Experimental study on treatment of acetabular anterior column fractures: applyment of a minimally invasive percutaneous lag screw guide apparatusa shows the cross-section of the acetabular notch, which presents the relationship between points (T, R-r) and the line, which has an inclination of 1 (namely T = r-r). b shows the minimum distance between the screw and the iliopectineal line’s arc roof, which presents the relationship between points (T, R-r) and the line with an inclination of 1 (namely T = r-r)Back to article page