Contribution of the plantar fascia and long plantar ligaments to the stability of the longitudinal arch of the foot.

Autor: Piarulli L; Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA., Mathew R; Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA., Siegler S; Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA. Electronic address: sieglers@drexel.edu.
Jazyk: angličtina
Zdroj: Journal of biomechanics [J Biomech] 2024 Nov; Vol. 176, pp. 112373. Date of Electronic Publication: 2024 Oct 19.
DOI: 10.1016/j.jbiomech.2024.112373
Abstrakt: The contribution of the Plantar Fascia (PF) and Long Plantar Ligament (LPL), two ligaments extending from the hindfoot to the forefoot, to arch stability has been studied in the past using in vivo, in vitro, and in silico methodologies. In silico studies were based on one single model obtained from one single subject and did not account for the known inter-subject morphological and biomechanical variations. In the present study, we developed computational dynamic models of nine different legs obtained from nine different individuals to evaluate the role of the LPL and PF in arch support, accounting for biological differences between subjects. These models were validated by comparing the simulation results against experimental results from the corresponding cadaver legs. After validation, we simulated body weight conditions for each model by applying a vertical load to the tibia, starting from zero and increasing linearly to 720 N. Kinematic and dynamic parameters, including the variation of the medial arch angle and of the navicular height, as well as the passive forces developed by the LPL and PF, were used to evaluate the contribution of these ligaments to arch support under body weight. The results indicate that a total collapse of the medial longitudinal arch occurred only when both the LPL and PF were absent, but a stable arch was maintained when either one of these two ligament structures were present. The results varied significantly among the specific models, highlighting the importance of using multiple models to account for inter-subject morphological differences.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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