Quantitative Analysis of Orthosis Design for Thoracolumbar Type Scoliosis
10.16156/j.1004-7220.2025.02.017
- VernacularTitle:针对胸腰弯型脊柱侧凸矫形器修型的量化分析
- Author:
Yalong SUN
1
;
Lei WANG
;
Zelilong HU
;
Xinyu WANG
;
Jiemeng YANG
;
Yingying ZHANG
;
Liwei ZHAO
;
Chengfei DU
;
Zhongjun MO
Author Information
1. 天津理工大学 天津市先进机电系统设计与智能控制重点实验室,机电工程国家级实验教学示范中心,天津 300384
- Publication Type:Journal Article
- Keywords:
scoliosis correction;
biomechanical modeling and simulation;
orthosis modification;
Cobb angle;
apical vertebra rotation
- From:
Journal of Medical Biomechanics
2025;40(2):371-377
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of orthosis design parameters on correction of scoliosis and orthosis-trunk interface pressure.Methods A finite element model of scoliosis was constructed to simulate the assembly effect of the orthosis.The orthosis was divided into four loading areas(left rib,right rib,anterior-left and posterior-right area)to simulate six modification conditions.In Models 1,2 and 3,a fixed modification of 20 mm was applied on the anterior left and posterior right areas,while the displacement loads of 20,25 and 30 mm were applied on both the left rib and right rib areas.In Models 4,5 and 6,a fixed modification of 25 mm was applied on left rib and right rib areas,with the displacement loads of 15,20 and 25 mm applied on both anterior left and posterior right areas.The Cobb angle,apical vertebral rotation(AVR)and interface pressure were calculated.Results The correction of Cobb angle in Models 1,2 and 3 was 8.94°,15.62° and 17.91°,respectively,with AVR correction of 7.53°,6.69° and 5.87°,respectively.In Models 4,5 and 6,the correction of Cobb angle was 14.55°,15.62° and 16.09°,with AVR correction of 5.25°,6.69° and 8.63°,respectively.In Model 6,the correction rate of Cobb angle and AVR was 45.48%and 41.22%,respectively,with a maximum pressure of 26.51 kPa on orthosis-trunk interface,achieving the most significant outcome.Conclusions The modification of orthosis has a significant effect on the correction of Cobb and AVR angles.The loading on the left rib and right rib areas mainly affect the Cobb angle,while the loading on the anterior left and posterior right areas mainly affect the spinal axial-rotation.A modification of 25 mm on all loading areas achieves the optimal spinal correction.This study provides the quantitative data for orthosis design.
