Finite element analysis of titanium rods after vertebral column decancellation osteotomy for ankylosing spondylitis
10.16098/j.issn.0529-1356.2024.03.012
- VernacularTitle:强直性脊柱炎椎骨去松质骨化截骨术后钛棒有限元分析
- Author:
Bao-Ke SU
1
;
Yong-Qing WANG
;
Zhi-Jie KANG
;
Hai-Yan WANG
;
Feng JIN
;
Xiao-He LI
;
Zhen-Hua CAO
;
Jia-Xuan HUO
;
Yong ZHU
;
Feng LI
Author Information
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
- Keywords:
Ankylosing spondylitis;
Titanium nail;
Titanium rod;
After orthopedics;
Finite element analysis;
Human
- From:
Acta Anatomica Sinica
2024;55(3):339-344
- CountryChina
- Language:Chinese
-
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.
