Biomechanical Study of Heel Pain During Push-off Period Based on Finite Element Method
Zhang Haowei1*, Chen Liang1, Yang Junyan1, Liu Ying1, Zheng Yongjun2
1(School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China) 2(Department of Pain, East China Hospital, Fudan University, Shanghai 200093, China)
Abstract：The pathogenesis and mechanism of rehabilitation of heel pain was studied in this paper. Images from CT scan and MRI of patients with heel pain were collected for three-dimensional reconstruction. Geomagic was used to optimize the surface of the obtained model, and the model was preprocessed with finite element through Hypermesh. The obtained lower limbs finite element model was imported intoAbaqus for analysis and calculation. The validity of the model was verified by comparing with the test results of plantar pressure plate. According to the calculation, the influence of the changes of triceps surae force on the biomechanical behavior characteristics of foot and ankle gait during the push-off was analyzed. The result showed that the muscle strength of the triceps surae increases from 550 N to 1100 N, the peak pressure in the first phalangeal area increased by 32.8%, and the peak pressure in the metatarsal area increased by 14.3%; the stress of the first plantar fascia was up to 4.69 MPa; the stress peaks at the junction of tendon and calcaneal and the calcaneal tuberosity were 7.41 MPa and 6.79 MPa respectively. These indicated that contracture of triceps surae and the windlass effect in the push-off period will lead to excessive stretch of plantar fascia, which would lead to stress level improvement at calcaneal tuberosity and change in the biomechanical environment of the foot, thus inducing plantar fasciitis and heel pain. Relieving the contracture of the triceps surae, reducing the muscle force and avoiding the overstretch of the plantar fascia and reducing the stress level at the attachment point, thus restoring the normal biomechanical environment of the foot are the main rehabilitation mechanisms for the treatment of heel pain.
章浩伟, 陈亮, 杨俊彦, 刘颖, 郑拥军. 基于有限元法对足跟痛在推离期的生物力学研究[J]. 中国生物医学工程学报, 2020, 39(2): 190-196.
Zhang Haowei, Chen Liang, Yang Junyan, Liu Ying, Zheng Yongjun. Biomechanical Study of Heel Pain During Push-off Period Based on Finite Element Method. Chinese Journal of Biomedical Engineering, 2020, 39(2): 190-196.
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