胸腰段脊柱纵向撞击伤后稳定性评价方法的比较

STABILITY EVALUATION OF THORACLUMBAR SPINE AFTER LONGITUDINAL IMPACT INJURY

目的:在实验研究条件下,比较评价撞击对脊柱稳定性影响的方法。方法:新鲜成人T12～L2脊柱标本18例,L3～L5标本19例,在分组施以不同能量的撞击前后,分别拍摄X线平片和CT扫描,并测试三维运动的变化。结果:上、下位腰椎在低能量撞击后运动范围无明显的变化;中级能量撞击后的运动范围均有增大;高能量撞击后的运动范围均大幅度提高（P<0.05）。结论:实验室条件下对胸腰段脊柱内源性稳定性的判断,三维运动测试的方法优于影像学的诊断。

To evaluate the stability of thoraclumbar spine after longitudinal impact with different energy. Methods: The fresh specimens of T12-L2 and L2-L5 were divided into three groups and were impacted with three different energy separately. Three dimensional motion were tested and roentgenograms and CT scan were taken before and after the impact. Results: Motion of superior or inferior lumbar were not changed after lower energy impact; but it increased after medial energy impact; after high energy impact the motion increased significantly(P<0.05). Conclusions: Three dimensional motion test is better than radiodiagnosis to evaluate the stability of thoraclumbar in laboratory.