Conclusion To judge the stability of lumbar spine by the intervertebral contact area, lumbar is stable during spondylolisthesis rate 0-23% and becomes unstable during 23%-44% phase.

• 结论 根据腰椎滑脱时椎体间接触面积变化的规律判断腰椎的稳定性，滑脱率0-23%25阶段为稳定期，滑脱率23%25-44%25阶段为相对不稳期。