摘要
目的:探讨腰骶前路的内固定方法,评价其生物力学稳定性。方法:制备24具新鲜成人尸体正常L3~S3节段脊柱标本,切除L5~S1椎间盘制成损伤模型,测试并比较脊柱L5~S1节段在正常、损伤、四种腰骶前路钛板螺钉固定、疲劳实验四种情况下的三维运动幅度。结果:四种内固定系统固定及疲劳实验后,L5~S1节段在各个方向的运动范围均比正常状态的运动范围小(P<0.05),梯形钛板螺钉在前屈、后伸及左、右弯方向上,均较其它组具有更好的稳定性。结论:四种腰骶前路内固定系统具有良好的即刻稳定性和抗疲劳稳定性,其中梯形钛板螺钉生物力学的稳定性能最佳。
Objective:To study the methods of lumbosacral anterior internal fixation and evaluate its biomechanical stability. Methods: To prepare the specimen of L3 - S3 vertebral column from 24 fresh adult cadavers. The models simulating damage were established by cutting the intervertebral disks of L5 - S1. The ranges of movement (ROM) in three dimensions of the L3 - S3 specimens were detected respectively in the conditions of normal, injured, fatigued and four kinds of lumbosaeral anterior internal fixation. The findings were compared. Results : The ROM of L5 - S1 in coherent direction after four kinds of lumbosaeral anterior internal fixation or fatigue experiment were less than that in normal state (P 〈 0.05 ). In the directions of flexion, extention, bend, the system of internal fixation with the ladder - shaped titanium screw showed better stability than other groups. Conclusion:Four kinds of lumbosacral anterior internal fixation have good instant stability and resistance to fatigue, in which the fixation with the ladder - shaped titanium screw has the best stability.
出处
《解剖与临床》
2008年第6期401-403,411,共4页
Anatomy and Clinics
基金
安徽省卫生厅重点学科基金资助项目
关键词
腰骶段
椎间盘切除
脊柱损伤
前路内固定
生物力学
Lumbosacral region
Disceetomy
Injury of spine
Anterior internal fixation
Biomechanies