Reoperation must excise thoroughly denatured protrusion,dissociate intervertebral disc tissue and all factors of making nerve canal stenosis,and rebuild the vertebrae stability.

• 再手术时应彻底切除变性突出，游离的椎间盘组织，解除一切构成神经通道狭窄的因素，同时应注意对椎体稳定性的重建。