Goel V K, Goyal S, Clark C, Nishiyama K, Nye T
Spine (Phila Pa 1976). 1985 Jul-Aug;10(6):543-54. doi: 10.1097/00007632-198507000-00008.
The biomechanical effects of discectomy on the motion behavior of whole lumbar spine are investigated using a Selspot II system. Fresh human ligamentous specimens were potted at the sacrum and clinically relevant loads (flexion/extension, right/left lateral bending, and right/left axial torsion moments) applied through a loading frame attached rigidly to the topmost vertebra of the specimen. The resulting three-dimensional motions of each vertebra for the intact specimen were recorded. The specimen was injured sequentially on the right side of the L4-5 level: partial laminectomy, partial facetectomy, subtotal discectomy, and total discectomy. The motion behavior of the specimen after each injury was recorded. The results of the injured tests were normalized with respect to the corresponding intact results. The normalized data for eight specimens were pooled for statistical analysis. Subtotal discectomy induced significantly less motion at the injury site than total discectomy, in all loading modes. At L3-4, the motion segment above the injury level, anteroposterior translation in flexion and lateral translation in left lateral bending show significant increases irrespective of the amount of nucleus excised. The clinical relevance of these findings are discussed.
使用Selspot II系统研究了椎间盘切除术对整个腰椎运动行为的生物力学影响。将新鲜的人体韧带标本固定在骶骨上，并通过牢固连接到标本最上方椎体的加载框架施加临床相关载荷（前屈/后伸、右侧/左侧侧屈以及右侧/左侧轴向扭矩）。记录完整标本中每个椎体产生的三维运动。在L4-5水平右侧依次对标本进行损伤：部分椎板切除术、部分关节突切除术、次全椎间盘切除术和全椎间盘切除术。记录每次损伤后标本的运动行为。将损伤测试结果相对于相应的完整结果进行归一化。汇总八个标本的归一化数据进行统计分析。在所有加载模式下，次全椎间盘切除术在损伤部位引起的运动明显少于全椎间盘切除术。在L3-4，损伤水平上方的运动节段，无论切除髓核的量如何，前屈时的前后平移和左侧侧屈时的侧向平移均显著增加。讨论了这些发现的临床意义。
