Fig. 2From: Bent or broken: analysis of set screw fracture in the TFNa implantDepicted is the technique for measuring proximal femoral shortening as described by Serrano et al. The measurements taken from the drawn lines are compared with the length of the helical blade. The proximal femur has shortened 1.2 cm from the images obtained during the initial procedure (left) to images obtained 12 days later (right)Back to article page