半椎体脊柱侧弯后路矫形中横向连接装置作用的有限元分析

发布时间：2018-01-17 01:32

本文关键词：半椎体脊柱侧弯后路矫形中横向连接装置作用的有限元分析　出处：《河北医药》2013年21期 　论文类型：期刊论文

【摘要】：目的运用所建立的半椎体所致脊柱侧弯有限元模型,模拟切除半椎体,分析横向连接装置(Cross-link Device,CLD)在脊柱后路椎弓根螺钉内固定系统中的作用。方法建立胸12半椎体有限元模型,obb 42°。模拟切除半椎体,并进行其上下各2个椎体置椎弓根螺钉,侧弯矫形后,放置纵向连接杆及横连,为CLD组;另一组手术方式与CLD组相同,只是不放横连,为NCLD组。给2组模型T9椎体上表面加载负荷,使其模拟脊柱前屈、后伸、侧弯与旋转动作,记录角位移并进行分析。结果随着加载力值的逐渐增加,2组模型的T10~L2角位移逐渐加大,基本呈线性增长,但差异无统计学意义(P0.05)。结论该患者半椎体切除椎弓根钉内固定术后上下各固定2个节段可以不用安装CLD。
[Abstract]:Objective to simulate the excision of hemivertebra by using the finite element model of scoliosis induced by hemivertebra, and to analyze the cross link Device. The role of CLD in posterior pedicle screw fixation system. Methods A finite element model of thoracic 12 hemivertebrae was established to simulate the resection of hemivertebra. The pedicle screws were placed in the upper and lower vertebrae of the two vertebrae, and the longitudinal connecting rod and the transverse connection were placed after lateral bending. The results were as follows: CLD group; The other group was operated on the same way as CLD group, except for NCLD group. Loading load on the upper surface of T9 vertebrae in two groups to simulate spinal flexion, extension, lateral bending and rotation. The angular displacement was recorded and analyzed. Results with the increasing of the loading force, the T10L _ 2 angular displacement of the two groups of models was gradually increased, and basically showed a linear increase. The difference was not statistically significant (P 0.05). Conclusion two segments of upper and lower fixation can be fixed without CLD after hemivertebra resection and pedicle screw fixation.
【作者单位】：河北医科大学第三医院小儿骨科;河北医科大学解剖教研室;
【分类号】：R726.8
【正文快照】： 先天性脊柱侧弯是一种发生在儿童的严重的脊柱疾病,发病率仅次于特发性脊柱侧弯,根据国外的流行病学统计,新生儿发病率约为1‰[1]。其中半椎体所致先天性脊柱侧弯较为常见,因椎体发育不全,在生长较快时可能产生身体失平衡表现及神经症状,严重时可能发生截瘫,所以常需手术早期

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