Construction of Three-Dimensional Finite Element Model of Hallux Valgus Foot and its Biomechanical Analysis of the First and Second Rays
10.16156/j.1004-7220.2024.02.012
- VernacularTitle:拇外翻足三维有限元模型构建及其第1、2跖列生物力学分析
- Author:
Yanli GENG
1
,
2
;
Zhiwen YUAN
;
Bokai XUAN
;
Min XU
Author Information
1. 河北工业大学人工智能与数据科学学院,天津 300401
2. 智能康复装置与检测技术教育部工程研究中心,天津 300401
- Keywords:
hallux valgus;
tensile force;
stress;
displacement;
orthosis
- From:
Journal of Medical Biomechanics
2024;39(2):272-277
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a finite element model of the hallux valgus foot and study the stress and displacement changes in the first and second rays of the hallux valgus under different tensile forces.Methods Foot CT images of a patient with hallux valgus were imported into Mimics to reconstruct a three-dimensional(3D)skeletal model of the foot.The 3-matic software was used to mesh the reconstructed model and generate the volume mesh.The optimized model was imported into ANSYS for finite element analysis.The relationship between the tensile forces and the stress/displacement of the first and second rays of the hallux valgus was verified by changing the size and direction of the tensile forces.Results Tensile forces of different magnitudes and directions were applied to the first proximal phalanx.When the force was less than 12 N,with an increase in tension,the displacement of the first phalange changed more significantly.For every 2 N increase in tension,the displacement increased by approximately 1 mm.When the force was greater than 12 N,with an increase in tension,the stress on the first phalange increased,whereas the displacement only changed slightly.In addition,when the magnitude of the force remained unchanged at 12 N and the direction of the force changed at intervals of 15°,the stress and stress distributions of the first and second rays changed with direction,and the displacement also changed accordingly.When the direction of the force was perpendicular to that of the second phalanx,the displacement of the first phalanx increased.Conclusions Finite element analysis technology can vividly and accurately analyze the stress and displacement changes of the first and second rays of hallux valgus under different tensile forces,and it lays a foundation for the design of hallux valgus orthoses.
