Fig. 5From: A modified surgical method for the treatment of ONFH: quadratus femoris muscle pedicle bone grafting with preservation of the posterior superior retinacular arteryDuring the osteotomy of the quadratus femoris bone flap, the length of the bone flap was slightly longer than the distance between the upper and lower edge of the quadratus femoris muscle to maximize the blood supply of the bone flapBack to article page