首页|强直性脊柱炎椎骨去松质骨化截骨术后钛棒有限元分析

强直性脊柱炎椎骨去松质骨化截骨术后钛棒有限元分析

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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。
Finite element analysis of titanium rods after vertebral column decancellation osteotomy for ankylosing spondylitis
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.

Ankylosing spondylitisTitanium nailTitanium rodAfter orthopedicsFinite element analysisHuman

苏宝科、王永清、康志杰、王海燕、金凤、李筱贺、曹振华、霍佳萱、祝勇、李峰

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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

内蒙古医科大学研究生院,呼和浩特 010000

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

内蒙古医科大学附属医院影像科,呼和浩特 010000

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

内蒙古医科大学第一临床医学院,呼和浩特 010000

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

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强直性脊柱炎 螺钉 钛棒 矫形后 有限元分析 人

内蒙古自治区自然科学基金内蒙古自治区自然科学基金内蒙古自治区卫生健康科技计划内蒙古医科大学"成果转化"项目内蒙古医科大学重点项目内蒙古自治区高等学校青年科技人才发展计划

2021MS080862020MS08124202201188YKD2020CGZH009YKD2021ZD001NMGIRT2227

2024

10.16098/j.issn.0529-1356.2024.03.012

解剖学报
中国解剖学会

解剖学报

CSTPCD
影响因子：0.462
ISSN：0529-1356
年,卷(期)：2024.55(3)
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