Computational Foot Modeling: Scope and Applications

Morales-Orcajo, Enrique; Bayod, Javier; Casas, Estevam Barbosa de Las

doi:10.1007/s11831-015-9146-z

Cited by 52 publications

(30 citation statements)

References 179 publications

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“…This study explored the effects of severe hallux valgus on metatarsal stress and on metatarsophalangeal joint loading while balanced standing using the FE method. The development of patient-specific models is advocated for foot problems with distinct structural deformity [27,28]. Knowledge of this study would provide information for medical treatment of HV and subject-specific footwear design.…”

Section: Discussionmentioning

confidence: 97%

Effects of severe hallux valgus on metatarsal stress and the metatarsophalangeal loading during balanced standing: A finite element analysis

Zhang

Awrejcewicz

Szymanowska

et al. 2018

Computers in Biology and Medicine

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The internal stress of the human foot enables efficient parametric evaluation of structural and functional impairments associated with foot deformities, such as hallux valgus (HV). However, the status of the internal stress of such a deformed foot remains insufficiently addressed due to the difficulties and limitations of experimental approaches. This study, using finite element (FE) methodology, investigated the influence of severe HV deformity on the metatarsal stress and the metatarsophalangeal (MTP) joint loading during balanced standing. FE models of a normal foot and a severe HV were constructed and validated. Each FE model involves 28 bones and various cartilaginous structures, ligaments, and plantar fascia, as well as encapsulated soft tissue. All the materials except for the encapsulated soft tissue were considered isotropic and linearly elastic, while the encapsulated soft tissue was set as nonlinear hyperelastic. Hexahedral elements were assigned to the solid parts of bones, cartilage, and the encapsulated soft tissue. Link elements were assigned to ligaments and plantar fascia. A plate was created for simulating ground support. A vertical force of a half-body weight was applied on the bottom of the plate for simulating balanced standing loading. The superior surfaces of the encapsulated soft tissue, distal tibia, and distal fibula were fixed. Stress distribution in the metatarsals, contact pressure, and force at the MTP joints were comparatively analysed. Compared to the normal foot, the HV foot showed higher stress concentration in the metatarsals but lower magnitude of MTP joint loading. In addition, the region with high contact pressure at the first MTP joint shifted medially in the HV foot. Knowledge of this study indicates that patients with severe HV deformity are at higher risk of metatarsal injuries and functional impairment of the MTP joints while weight bearing.

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Section: Discussionmentioning

confidence: 97%

Effects of severe hallux valgus on metatarsal stress and the metatarsophalangeal loading during balanced standing: A finite element analysis

Zhang

Awrejcewicz

Szymanowska

et al. 2018

Computers in Biology and Medicine

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“…External validity remains a challenge in finite element analysis that hinders the generalization of the findings. Since creating a single model and simulation could be strenuous, most of the finite element studies adopted a single-subject design [ 15 , 28 ]. This study endeavoured to invite a healthy young female that believed to be typical and representative.…”

Section: Discussionmentioning

confidence: 99%

“…The material properties of the model parts were all selected from previous literatures. The elastic moduli of the trabecular and cortical were 0.4MPa and 17GPa respectively, while the Poisson’s ratios were 0.3 [ 28 ]. The elastic modulus of the bone without segmentation of trabecular and cortical was assigned with 7.3GPa and the Poisson’s ratio was 0.3 [ 29 ].…”

Section: Methodsmentioning

confidence: 99%

Finite Element Analysis of Foot and Ankle Impact Injury: Risk Evaluation of Calcaneus and Talus Fracture

et al. 2016

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IntroductionFoot and ankle impact injury is common in geriatric trauma and often leads to fracture of rearfoot, including calcaneus and talus. The objective of this study was to assess the influence of foot impact on the risk of calcaneus and talus fracture via finite element analysis.MethodsA three-dimensional finite element model of foot and ankle was constructed based on magnetic resonance images of a female aged 28. The foot sustained a 7-kg passive impact through a foot plate. The simulated impact velocities were from 2.0 to 7.0 m/s with 1.0 m/s interval.ResultsAt 5.0 m/s impact velocity, the maximum von Mises stress of the trabecular calcaneus and talus were 3.21MPa and 2.41MPa respectively, while that of the Tresca stress were 3.46MPa and 2.55MPa. About 94% and 84% of the trabecular calcaneus and talus exceeded the shear yielding stress, while 21.7% and 18.3% yielded the compressive stress. The peak stresses were distributed around the talocalcaneal articulation and the calcaneal tuberosity inferiorly, which corresponded to the common fracture sites.ConclusionsThe prediction in this study showed that axial compressive impact at 5.0 m/s could produce considerable yielding of trabecular bone in both calcaneus and talus, dominantly by shear and compounded with compression that predispose the rearfoot in the risk of fracture. This study suggested the injury pattern and fracture mode of high energy trauma that provides insights in injury prevention and fracture management.

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“…Este estudio toma como base el modelo propuesto por Morales-Orcajo, et al 23,24 , desarrollado por el grupo de investigación Applied Mechanics and Bioengineering de la Universidad de Zaragoza (España). Este modelo parte de la reconstrucción de un pie humano de un paciente con metatarsalgia neuropática mediante un escáner clínico convencional modelo SIEMENS SOMATON.…”

Section: Modelo De Elementos Finitos Controlunclassified

Efecto de la osteotomía medializante de calcáneo sobre tejidos blandos de soporte del arco plantar: un estudio computacional

Larraínzar-Garijo

Portilla

Gutiérrez-Narvarte

et al. 2019

Revista Española de Cirugía Ortopédica y Traumatología

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Medializing calcaneal osteotomy forms part of the treatment options for adult acquired flat foot. The structural correction that is achieved is widely known. However, the effect of this procedure on the soft tissues that support the plantar arch has been little studied, since it is not possible to quantify experimentally the tension and deformation variations generated. Therefore, the objective of this study was to evaluate the effect of medializing calcaneal osteotomy on the soft tissue that supports the plantar arch, using a computational model of the human foot designed with a clinical approach. The proposed finite element model was reconstructed from computerized tomography images of a healthy patient. All the bones of the foot, the plantar fascia, cartilages, plantar ligaments and the calcaneus-navicular ligament were included, respecting their anatomical distribution and biomechanical properties. Simulations were performed emulating the monopodal support phase of the human walk of an adult. The effect on each tissue was evaluated according to clinical and biomechanical criteria. The results show that calcaneal osteotomy reduces the tension normally generated on the evaluated tissues, with the effect on the calcaneus-navicular ligament and the plantar fascia being the most notable. The deformation results obtained are consistent with experimental tests and clinical knowledge. The versatility of this model allows the objective assessment of different conditions and supports decision making for the treatment of adult acquired flat foot in middle and advanced stages.

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Computational Foot Modeling: Scope and Applications

Cited by 52 publications

References 179 publications

Effects of severe hallux valgus on metatarsal stress and the metatarsophalangeal loading during balanced standing: A finite element analysis

Effects of severe hallux valgus on metatarsal stress and the metatarsophalangeal loading during balanced standing: A finite element analysis

Finite Element Analysis of Foot and Ankle Impact Injury: Risk Evaluation of Calcaneus and Talus Fracture

Efecto de la osteotomía medializante de calcáneo sobre tejidos blandos de soporte del arco plantar: un estudio computacional

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