期刊论文

Different inserting rod sequences in Lenke 1AN adolescent idiopathic scoliosis: a finite element analysis

中文

中国矫形外科杂志

1005-8478

2019

27

19

1780-1784

10.3977/j.issn.1005-8478.2019.19.12

湖南省自然科学基金项目(编号:2015JJ6075).

本校为第一机构

[目的]建立Lenke 1AN型青少年特发性脊柱侧凸的三维有限元模型,分析三种不同置钉模式中凹侧螺钉的应力分布。[方法]建立一个T_2~S_5脊柱侧凸的三维有限元模型,在凹侧置入椎弓根螺钉,按照不同的置棒方式进行矫形模拟。A组模拟从顶椎开始,再依次向上和向下置棒;B组从中立椎开始,然后依次向上,再从中立椎下方开始置棒;C组从中立椎开始,然后依次向下,再从中立椎上方开始置棒,最后分析椎弓根螺钉及连接棒的等效应力。[结果]研究表明A组连接棒上的等效应力相对稳定,而B组和C组应力变化较大。虽然无论何种置棒顺序,都可以得到相同的脊柱侧凸矫正效果,但是A组连接棒上应力分布变化较小,而且最大应力小。...

[Objective] To develop a patient-specific Lenke 1AN scoliosis finite element (FE) model, and using this model to analyze the three-dimensional corrective forces and stress distributions which acting at each screw located on the concave side with the three different setting rod sequences. [Methods] A T_2~S_5 scoliosis FE model was successfully developed and validated. Pedicle screws were inserted from T3 to L4 on the concave side, then three different sequences of rod placement were mimicked. In the A group the rod was inserted on the pedicle screw at the apical vertebra firstly, and then on th...