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通过对青老年组腰椎三维运动范围的比较研究，探讨老年人腰椎稳定性及其生物代偿性变化的成因。选取１５ 具新鲜成人男性尸体分为两组：青年组，２０～３０ 岁，７ 例；老年组，６０～７０ 岁，８ 例。切取腰椎（Ｌ１－Ｓ１），用加载系统和计算机图像处理系统测量Ｌ１－Ｓ１ 各节段的三维运动范围。结果：老年组腰椎三维运动范围较青年组有减少趋势，在前屈时ＮＺ有显著性差异。结论：老年人腰椎未因腰椎退变而失稳，稳定性反而加强，原因是腰椎退变刺激腰椎产生生物代偿性变化而重塑稳定。
Through the comparative study of three-dimensional movement range of the lumbar spine in the elderly group, the causes of lumbar stability and biocompatibility in the elderly were discussed. Fifteen fresh adult male bodies were divided into two groups: youth group, 20-30 years old, 7 cases; elderly group, 60-70 years old, 8 cases. The lumbar spine (L1-S1) was excised and the three-dimensional motion range of each segment of L1-S1 was measured using a loading system and a computerized image processing system. Results: The three-dimensional range of motion of the lumbar vertebra in the elderly group showed a decreasing trend compared with that of the young group. NZ had significant difference in flexion. CONCLUSION: The lumbar spine of the elderly is not destabilized due to degenerative lumbar spine but the stability is rather enhanced. The reason is that the degenerative lumbar spine stimulates the lumbar spine to produce biocompatibility and remodeling stability.