摘要
目的:评价颈椎间盘激光汽化减压术后的生物力学性质变化,并探讨其临床意义。方法:选取12具新鲜羊颈椎标本,共制成24个颈椎间盘功能单位,剔除所有的肌肉组织、韧带和椎体后部结构,分两组,每组12个标本。每组依次使用400J、600J、800J和1000J4组不同激光能量进行汽化减压,然后放置在CTM4104生物力学试验机上分别进行压缩刚度、剪切刚度测试。结果:颈椎间盘汽化后压缩刚度较汽化前减少(P<0.05),但不同能量组汽化后刚度变化差异无显著性(P>0.05);剪切刚度较汽化前相比无明显变化(P>0.05),不同能量组汽化后剪切刚度变化差异无显著性(P>0.05)。结论:半导体激光颈椎间盘汽化减压后颈椎间盘的轴向抗压缩变形能力有下降,但对抗剪切影响不大。激光颈椎间盘汽化术后配合颈椎牵引疗效可能更佳。
Obdective： To evaluate the changes of biomechanical property in goat cervical intervertebral discs after disc-decompression with the semiconducting laser and to discuss its role in clinical application. Methods：Twelve fresh cervical vertebrae（C2-C7） of goat were harvested. The paraspinal musculature as well as the posterior elements were removed. The discs were radiated with the semiconducting laser energies varying from 400J to 1000J in 4 groups. The stiffness of compression and torsion were measured before and after radiating. Results：There was a signifi-eant decrease in compressive stiffness after ablation of nucleus pulposus tissue （P〈0.05）;but no significant difference of stiffness was found in different energy groups after radiating（P〉0.05）.The differences between before and after radiation on torsional stiffness were not significant （P〉0.05） . Concluslon：The use of semieondueting laser in cervical diseeetomy may cause changes of biomeehanleal property under axial loading, however,it has little effect on torsion stiffness. Traction after laser disc decompression in the treatment of cervical disc herniation can achieve more ideal results.
出处
《温州医学院学报》
CAS
2006年第2期134-136,共3页
Journal of Wenzhou Medical College
关键词
颈椎间盘
激光
汽化减压
生物力学
cervical intervertebral disc
laser
disc decompression
biomechanics
