Method By the analysis of X ray film of pre operation and operation, to give harm spine and deflecting angle of dick screw for head or foot, orientating pedicle of vertebral arch, enlonging distance of dick rod for restoring spine height.

• 方法 通过对术前、术中X线片分析 ,来确定伤椎、向头或尾侧倾斜度、定位椎弓根、恢复脊柱高度所需迪克棒撑开的距离。