Biomechanical analysis of foot crush injury based on finite element model

doi:10.3969/j.issn.2095-4344.1118

Abstract

Abstract:

BACKGROUND: Mechanical distribution and damage of foot bones under rolling condition are simulated by using the established foot finite element digital model.

OBJECTIVE: To simulate the crush injury by using the three-dimensional finite element model of foot, and to explore a new technique for studying the stress and damage of human foot by finite element method.

METHODS: Foot (bones and joints from toe to distal tibia and distal fibula) of one female volunteer underwent CT scanning. The three-dimensional reconstructed digital model was imported into the ANSYS 13.0 software. The finite element mechanical analysis of simulating crush injury was carried out by setting 100, 200, 500 and 1 000 N of pressure, and solving the test calculation.

RESULTS AND CONCLUSION: (1) Under rolling condition, the stress of foot bones was increased with pressure increasing, and the maximum stress occurred on the anteromedial heel. (2) Metatarsal stress mainly concentrated on the first, second and third metatarsuses. (3) Tarsal stress mainly concentrated on the joints between tarsus and metatarsus, and joints between tarsuses. (4) With the pressure increasing, the stress gradually concentrated on the medial side of tarsometatarsal joint. The stress of medial cuneiform bone was larger than the other tarsuses. (5) Finite element stress analysis of tarsometatarsal joint under simulated crush injury shows that the maximum stress and the site of the strain in the case of crush injury is consistent with that of the patients with clinical tarsal injury, and indirectly confirms the reliability of the finite element model, which can provide a digital platform for the study on tarsal and plantar joint damage.

Key words: Tissue Engineering, Foot Bones, Finite Element Analysis, Biomechanics

CLC Number:

R445.3

Zhang Hong, Fan Yali, Yang Donghao, Ren Guoshan, Zhou Yuning, Yan Zhanping. Biomechanical analysis of foot crush injury based on finite element model[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(12): 1903-1907.

Figures/Tables 3

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