Mechanical Evaluation of Deformation Behavior in Lumbar Spine with Spinal Instrumentation

椎弓根螺钉-棒系统广泛应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，邻近节段性疾病如椎间盘退变和滑脱可能偶尔会发生，但邻近节段性疾病的原因尚不清楚。因此，我们对野猪身体标本进行了多节段腰椎旋转试验。结果表明，在恒定角位移下，固定模型的相邻节段运动范围和负重最大扭矩均显著高于损伤模型。

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.