摘要
目的：研究长节段、短节段固定对腰骶节段退变发生过程中的影响。方法：取20具绵羊L1～S5节段标本，以椎弓根螺钉固定，依据固定长度的不同分为完整对照组、短节段固定组、长节段固定组。本实验为自身对照实验，对各组标本分别进行6Nm力矩的加载，比较各组腰骶节段活动度及椎间盘压力的变化。结果：与对照组相比，短节段固定组腰骶节段活动度、椎间盘压力增加不明显，组间差异无统计学意义（P〉0．05），长节段固定组腰骶节段活动度、椎间盘压力增加不明显，组间差异有统计学意义（P〈0．05）。结论：长节段腰椎内固定对腰骶节段退变的影响较大，建议尽量减少固定长度。
Objective： To study the changes of inferior adjacent segmental after different segmental fixa- tion, and to analyze the accelerating mechanism of the adjacent segment degeneration. Methods：Take 60 sheep lumbar spine specimens （Waist 1 vertebral body S5）, With pedicle screws, according to the different fixed sec- tion is divided into complete control group （not fixed）, L6-7 single segment fixed group, L5 - L7 short segmen- tal fixed group, L3 - L7 long segmental fixed group, measured biomechanical experiment in the 6Nm torque loading, L7 -S1 sacral vertebra clearance were measured in different fixed section. Results：Applied in fixed, be- neath the adjacent segment in the stretch direction of angular displacement, intervertebral disc pressure is in- creased significantly, increase amplitude with fixed range of increasese. The difference between groups was sta- tistically significant（P 〈 0.05）. Conclusions： After fixing spine in pedicle screws, the longer the segmentation is fixed, the more effect it has on subjacent segment degeneration.
出处
《内蒙古医学杂志》
2013年第7期789-791,共3页
Inner Mongolia Medical Journal
关键词
腰椎退变
内固定
Lumbar vertebra
Internal fixation
Intervertebral disc degeneration
