方法：通过横突前，沿横突、椎弓根和椎体腰部，严格的从骨膜下向前剥离，直达前纵韧带下方。

Methods: Through the anterior transverse process along the transverse process, pedicle and vertebral body waist from subperiosteal forward to stripped until the below of longitudinal ligament.

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目的：观察腰椎管减压、横突间或椎体间植骨脊柱融合和椎弓根螺钉内固定手术治疗高龄退行性病变腰椎不稳定患者的效果。

Objective: to evaluate the efficacy of decompress laminectomy, pedicle screw fixation and posterior lumbar fusion in the treatment of degenerative lumbar spinal instability of elder patients.

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目的：观察腰椎管减压、横突间或椎体间植骨脊柱融合和椎弓根螺钉内固定手术治疗退变性腰椎管狭窄合并节段性腰椎不稳定患者的效果。

Objective: to evaluate the efficacy of decompress laminectomy, pedicle screw fixation and posterior lumbar fusion in the treatment of degenerative lumbar spinal stenosis with segmental instability.

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