Finite element analysis of new type of unicortical external fixator and unilateral external fixator
10.19745/j.1003-8868.2024211
- VernacularTitle:新型单皮质外固定架与单边式外固定架的有限元分析
- Author:
Shuai-Yang LIU
1
,
2
;
Cheng-Dong HU
;
Hao-Ye MENG
;
Hao ZHOU
;
Rong-Hui LIU
;
Jiang PENG
Author Information
1. 解放军总医院第四医学中心骨科医学部研究所,北京 100853
2. 邯郸市第一医院,河北邯郸 056002
- Keywords:
tibial fracture;
unicortical external fixator;
unilateral external fixator;
finite element analysis;
biomechanics;
ex-ternal fixation
- From:
Chinese Medical Equipment Journal
2024;45(11):32-38
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the biomechanical properties of new type of unicortical and unilateral external fixators by finite element analysis.Methods Firstly,a tibia model was reconstructed based on the CT data images using Mimics software,and then processed and modified by Geomagic Wrap software.Secondly,Solidworks software was used to establish the 3D models for new type of unicortical and unilateral external fixators,and fracture defect was made in the tibia model and then the model was assembled with the external fixators.Finally,mesh delineation was performed using ABAQUS software,and axial compression,torsion and bending loads were applied to the assemblies,respectively,to observe the stress distributions and fracture displacements and to evaluate the biomechanical properties of the 2 types of external fixators.Results The new type of unicortical external fixator had the mean and maximum stresses at the nail-bone interface and the stress distribution at the pin-bone contact surface lower than those of the unilateral external fixator under the three different loads,which behaved better in torsional resistance while worse in axial compression and bending resistance than the unilateral external fixator.Conclusion The new type of unicortical external fixator has the biomechanical stability slightly weaker than that of the unilateral external fixator,which shows sufficient stability and reasonable load distribution when used for temporary fixation with lower likelihood of nail breaking,periprosthetic fractures of the tibia pin tract and loosening of the bone pins when compared with the unilateral external fixator.[Chinese Medical Equipment Journal,2024,45(11):32-38]
