Fig. 7From: A study of screw placement to obtain the optimal pull-out resistance of lumbar pedicle screws—analysis of Hounsfield units measurements based on computed tomographyBased on the analysis of statistical results, the optimal placement direction of the pedicle screws in each vertebral body of the lumbar spine and the direction in patients with lumbar spondylolisthesis and osteoporosis is consistent with the criteria concludedBack to article page