Stokes I A
Department of Orthopaedics and Rehabilitation, University of Vermont, USA.
Clin Biomech (Bristol). 1988 May;3(2):101-5. doi: 10.1016/0268-0033(88)90052-6.
Sections of human cadaver lumbar spines consisting of the L3, L4 and L5 vertebrae and the intervening discs and ligaments were tested mechanically to determine the effects of simulated spondylolysis and of facet joint fusion. Compression, flexion and extension, lateral bending, axial rotation forces and torques were applied to intact specimens and then after unilateral and bilateral division of the pars interarticularis, and, in a separate group of specimens, after unilateral and bilateral immobilization of the facet joints. Division of the pars interarticularis caused a large increase in axial rotation, and a lesser increase in lateral bending. Other motions were not statistically significantly changed. Facet fixation caused a statistically significant decrease in flexion and extension only. The average anterior or posterior shear motion across the intervertebral discs was less than 1 mm in magnitude in intact specimens, and none of the interventions produced statistically significant changes in this motion accompanying the angular motion.
对由L3、L4和L5椎体以及其间的椎间盘和韧带组成的人体尸体腰椎节段进行力学测试，以确定模拟椎弓根峡部裂和小关节融合的影响。对完整标本施加压缩、屈伸、侧弯、轴向旋转力和扭矩，然后在单侧和双侧关节突间部切断后，以及在另一组标本中，在单侧和双侧小关节固定后进行测试。关节突间部切断导致轴向旋转大幅增加，侧弯增加幅度较小。其他运动在统计学上无显著变化。小关节固定仅导致屈伸在统计学上显著减少。完整标本中椎间盘上的平均前后剪切运动幅度小于1毫米，并且没有任何干预措施在伴随角运动时对该运动产生统计学上的显著变化。
