Fig. 1

Postoperative X-ray of intertrochanteric fractures. A X-ray shows positive medial cortical support, meaning that the inferior edge of the medial cortex of the femoral head-neck fragment is medial to the superior edge of the medial cortex of the femoral shaft with a displacement of less than one cortical thickness. B X-ray shows negative medial cortical support, meaning that the inferior edge of the medial cortex of the femoral head-neck fragment is lateral to the superior edge of the medial cortex of the femoral shaft, regardless of displacement distance. C X-ray shows neutral medial cortical support, meaning that the medial cortex of the head–neck fragment and the femoral shaft are in smooth contact