Comparison of Biomechanical Properties of Ilizarov External Fixator with Three Configurations for Treating Humeral Stem Defects
10.16156/j.1004-7220.2025.04.017
- VernacularTitle:用于治疗肱骨干缺损的3种构型Ilizarov外固定支架生物力学性能比较
- Author:
Yuanyang REN
1
;
Liang JI
1
;
Qingsong LI
1
;
Yanchun HU
1
;
Dengnan WU
1
;
Jian TANG
1
;
Xiang QIAO
1
Author Information
1. 贵阳第四人民医院手显微外科,贵阳 550002
- Publication Type:Journal Article
- Keywords:
humeral stem defect;
external fixator;
Ilizarov technology;
biomechanical test
- From:
Journal of Medical Biomechanics
2025;40(4):916-921
- CountryChina
- Language:Chinese
-
Abstract:
Objective The biomechanical performance of Ilizarov fixator models with different configurations for humeral shaft defect was compared,so as to provide a biomechanical basis for selecting the appropriate circular external fixation structure for the clinical treatment of humeral shaft defects using Ilizarov technology.Methods Based on CT data of the humerus from a healthy volunteer,the external fixators with three configurations,namely,hybrid frame,semi-ring frame and 90° fan frame were established.The finite element method was used to simulate the displacement and stress distribution under different loading conditions,and the finite element results were validated by biomechanical tests.Results Finite element analysis results:in terms of displacement,under compression,tensile and torque conditions,the displacement of 90° fan model was smaller than that of hybrid and semi-ring models.In terms of stress,the 90° fan model had the smallest displacement under tensile condition.In compression and torque tests,the semi-annular model had the lowest stress.Biomechanical test results:the semi-ring model exhibited the smallest displacement under axial compression,but there was no significant difference between the three models(P＞0.05).Conclusions The semi-ring and 90° fan frames can achieve a similar stability as the traditional hybrid frame through the strategy of'reducing the ring and increasing the stem'.The unilateral structure of the 90° fan frame has the advantages of small size,light weight,and structural stability,as well as a small impact on the shoulder and elbow joints,which makes it more valuable in clinical applications.
