Ielapi Alessio, Lammens Nicolas, Van Paepegem Wim, Forward Malcolm, Deckers Jan Patrick, Vermandel Miguel, De Beule Matthieu
a Department of Electronics and Information Systems , Institute Biomedical Technology (IBiTech) - bioMMeda, Ghent University , Gent , Belgium.
b SIM vzw , Zwijnaarde , Belgium.
Comput Methods Biomech Biomed Engin. 2019 Jun;22(8):880-887. doi: 10.1080/10255842.2019.1601712. Epub 2019 Apr 8.
The purpose of this study was to create and validate a standardized framework for the evaluation of the ankle stiffness of two designs of 3D printed ankle foot orthoses (AFOs). The creation of four finite element (FE) models allowed patient-specific quantification of the stiffness and stress distribution over their specific range of motion during the second rocker of the gait. Validation was performed by comparing the model outputs with the results obtained from a dedicated experimental setup, which showed an overall good agreement with a maximum relative error of 10.38% in plantarflexion and 10.66% in dorsiflexion. The combination of advanced computer modelling algorithms and 3D printing techniques clearly shows potential to further improve the manufacturing process of AFOs.
本研究的目的是创建并验证一个标准化框架，用于评估两种3D打印踝足矫形器（AFO）设计的踝关节刚度。创建四个有限元（FE）模型，能够针对患者在步态第二个摆动期的特定运动范围内的刚度和应力分布进行个体化量化。通过将模型输出结果与专门实验装置所获结果进行比较来进行验证，结果显示总体一致性良好，跖屈时最大相对误差为10.38%，背屈时为10.66%。先进的计算机建模算法与3D打印技术的结合清楚地显示出进一步改进AFO制造工艺的潜力。
