强直性脊柱炎椎骨去松质骨化截骨术后钛棒有限元分析
Finite element analysis of titanium rods after vertebral column decancellation osteotomy for ankylosing spondylitis
苏宝科 1王永清 1康志杰 2王海燕 3金凤 4李筱贺 3曹振华 5霍佳萱 6祝勇 7李峰8
作者信息
- 1. 内蒙古自治区中医医院(内蒙古医科大学中医附属医院)急诊科,呼和浩特 010000
- 2. 内蒙古医科大学研究生院,呼和浩特 010000
- 3. 内蒙古医科大学基础医学院人体解剖学教研室,呼和浩特 010000
- 4. 内蒙古医科大学附属医院影像科,呼和浩特 010000
- 5. 锦州医科大学第三附属院骨科,辽宁 锦州 121000;内蒙古医科大学第二附属医院脊柱外科,呼和浩特 010000;中国人民解放军总医院脊柱外科,北京 100000
- 6. 内蒙古医科大学第一临床医学院,呼和浩特 010000
- 7. 北京大学肿瘤医院内蒙古医院(内蒙古医科大学附属肿瘤医院),内蒙古癌症中心,呼和浩特 010000
- 8. 内蒙古医科大学第二附属医院脊柱外科,呼和浩特 010000
- 折叠
摘要
目的 通过对去松质骨化(VCD)截骨术后强直性脊柱炎患者胸椎(T)11～骶骨(S)节段钛棒应力变化分析,为术前钛棒选择、改进提供参考.方法 将VCD截骨术后强直性脊柱炎患者连续扫描的断层影像原始数据以DICOM格式导入Mimics 21.0 软件,分别重建T11～S、螺钉和钛棒,导入到 3-Matic建立初步几何模型,进行去噪、铺面、平滑等处理,完善后的模型导入Hypermesh10 软件进行网格划分,对材料进行属性赋值后导入 ANSYS 19.2 中显示有限元模型,设定边界和载荷条件,测量螺钉与钛棒连接处应力值.结果 在中立位、前屈、侧向弯曲、轴向旋转工况下,钛棒在上端椎(T11)应力最大,顶椎(L3)应力最小;在后伸工况下,钛棒在下端椎(L5)应力最大.结论 在上、下端椎可考虑增粗钛棒直径,增强钛棒硬度,或改为双棒.
Abstract
Objective To analyze the stress changes of thoracic vertebra(T)11-sacrum(S)titanium rods in patients with ankylosing spondylitis after vertebral column decancellation(VCD)osteotomy,and provide reference for the selection and improvement of titanium rods before surgery.Methods The original data of the continuous scanning tomographic images of patients with ankylosing spondylitis after VCD osteotomy were imported into Mimics 21.0 in DICOM format,and T11-S vertebrae,screws and titanium rods were respectively reconstructed.They were imported into 3-Matic to establish a preliminary geometric modeling,and then processed with noise removal,paving,smoothing,etc.The improved model was imported into Hypermesh 10 software for grid division,and the material was imported into ANSYS 19.2 to display the finite element model after attribute assignment,Set the boundary and load conditions,and measure the stress value at the connection between the screw and the titanium rod.Results Under neutral position,forward bending,lateral bending,and axial rotation conditions,the titanium rod had the highest stress at the upper vertebrae(T11)and the lowest stress at the top vertebrae(L3);Under the backward extension condition,the titanium rod has the highest stress at the lower end vertebra(L5).Conclusion In the upper and lower vertebrae,it is possible to consider increasing the diameter of the titanium rod,enhancing its hardness,or changing it to a double rod.
关键词
强直性脊柱炎/螺钉/钛棒/矫形后/有限元分析/人Key words
Ankylosing spondylitis/Titanium nail/Titanium rod/After orthopedics/Finite element analysis/Human引用本文复制引用
基金项目
内蒙古自治区自然科学基金(2021MS08086)
内蒙古自治区自然科学基金(2020MS08124)
内蒙古自治区卫生健康科技计划(202201188)
内蒙古医科大学"成果转化"项目(YKD2020CGZH009)
内蒙古医科大学重点项目(YKD2021ZD001)
内蒙古自治区高等学校青年科技人才发展计划(NMGIRT2227)
出版年
2024
NETL
NSTL
万方数据