The result of analysis showed that the backward stretching position of stresses of centrum and small joints and stress of pedicle vertebral arch were greater then those of the anteflexion position .

分析结果表明：椎体、小关节应力、椎弓根应力后伸位大于前屈位；椎间盘内部应力前屈位大于后伸位；且均由上至下呈逐渐增大的趋势。