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Computational models of flatfoot with three-dimensional fascia and bulk soft tissue interaction for orthosis design

Medicine in Novel Technology and Devices 2021年第1期9卷 18-25页

作者： Yinghu Peng Duo Wai-Chi Wong Yan Wang Tony Lin-Wei Chen Guoxin Zhang Fei Yan Ming Zhang The Hong Kong Polytechnic University Shenzhen Research Institute ShenzhenChina Department of Biomedical Engineering Faculty of EngineeringThe Hong Kong Polytechnic UniversityHong KongChina

The finite element(FE)method has been widely used to investigate the internal force of plantar fascia,which could reveal the relationship between plantar fascia dysfunction and flatfoot deformity during weight-bearing ***,for most foot FE models,plantar fascia utilized truss elements or three-dimensional geometry that did not consider the interaction between plantar fascia and bulk soft *** configurations could ignore the impact of superoinferior loading induced by arch support and underestimate the plantar fascia *** study aims to investigate how the fascia-bulk soft tissue interaction affects the internal foot biomechanics in the flatfoot FE analysis with a three-dimensional plantar fascia model,which included both fascia-bone and fascia-bulk soft tissue interactions(3DBPT).To evaluate the effect of fascia-bulk soft tissue interaction on internal foot mechanics,this study compared the 3DBPT model with the other two plantar fascia models,including linear fascia(BPL)and three-dimensional plantar fascia without fascia-bulk soft tissue interaction(3DBP).The predicted foot contact pressure in the 3DBPT model was compared with the measured value obtained by the F-Scan pressure measurement system in balanced *** von Mises stresses in the plantar fascia and foot ligaments were *** stress of the plantar fascia in the 3DBPT model was higher than that of *** the 3DBPT model,the superoinferior loading exerted on the bulk soft tissue could be directly transferred to the plantar *** proposed model,including the plantar fascia and bulk soft tissue interaction,could reveal relatively reliable plantar fascia loading in flatfoot deformity,thereby contributing to the development of orthotic designs for the flatfoot deformity.

关键词： Plantar fascia foot-ankle complex Flatfoot Biomechanics Finite element analysis

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