Mechanical Evaluation of Deformation Behavior in Lumbar Spine with Spinal Instrumentation

椎弓根钉棒系统广泛用于脊柱疾病的外科治疗。虽然他们治疗的长期临床结果表明，相邻节段性疾病，如椎间盘退变和滑动可能偶尔发生，相邻节段性疾病的原因是未知的。因此，我们使用野猪尸体标本的多节段腰椎进行旋转测试。在本研究的结果中，在恒定角位移下，与损伤模型相比，固定模型中相邻节段的ROM（活动范围）和负载最大扭矩显著增加。

The pedicle screw and rod system is widely used for surgical treatments of spinal disorders. Although the long-term clinical outcomes of their treatments have demonstrated that adjacent segmental diseases such as disk degeneration and slipping may be occasionally occurred, the cause of adjacent segmental diseases is unknown. Therefore, we conducted the rotational test using multi-segment lumbar spine of wild boar cadaver specimens. At the result of this study, the ROMs (range of motion) of adjacent segments and loaded maximum torque in the fixed model were significantly increased in comparison with the injured model under the constant angular displacement.