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Gepubliceerd in: Journal of Foot and Ankle Research 1/2014

Open Access 01-04-2014 | Meeting abstract

Effects of plantar fascia on first metatarsophalangeal joint stress in different foot types

Auteurs: Rajshree Mootanah, Khadija Saoudi, Joel Mazella, Antoine Truchetet, Jonathan Deland, Scott Ellis, Josh Baxter, Howard J Hillstrom

Gepubliceerd in: Journal of Foot and Ankle Research | bijlage 1/2014

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ZOEKEN
Osteoarthritis (OA) is the leading cause of disability in older adults [1] and 1st metatarsophalangeal joint (MTPJ) OA, is the most common form of OA in the foot [2]. Many foot pathologies are of a biomechanical nature and often associated with one foot type over another [3, 4]. OA is postulated to result from elevated joint stress. However, the link between stress distribution in the 1st MTPJ and different foot types is not well understood. Furthermore the tension band effect of the plantar fascia upon 1st MTP joint function is also not well understood.
A high resolution 7 Tesla MRI was used to create a geometrically accurate 3D model of the 1st MTPJ using Mimics v14 imaging software. To simulate rectus, planus and cavus feet, 1st metatarsal declination angles of 20.2°, 10.1° and 30.7° were constructed. Plantar fascia material properties were altered. Physiological material properties and boundary conditions were applied to solve for stress, using ABAQUS. The ligaments were simulated by linear spring elements. The base of the first metatarsal bone was mechanically grounded in this model. Plantar loading conditions were applied, based on plantar pressure data collected from different foot types.
Results of our static 3D FE model (Figure 1) during mid-stance of gait showed peak stresses in the distal 1st MTPJ cartilage of 0.61 MPa, 0.97 MPa and 1.10 MPa for the rectus, cavus and planus foot type, respectively (Figure 1). First MTP joint stress is largest for planus and cavus foot types and least for well-aligned rectus feet. Global foot alignment affected the magnitude and location of peak stress within the joint. Peak stress decreases as the k increases suggesting that the plantar fascia plays an important ‘tension band’ effect (Figure 2). Future research should develop methods of tuning plantar fascia material properties to represent a specific patient.

Acknowledgement

This work was in part supported by an NIH grant 1R03HD053135-01.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://​creativecommons.​org/​licenses/​by/​4.​0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://​creativecommons.​org/​publicdomain/​zero/​1.​0/​) applies to the data made available in this article, unless otherwise stated.
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Metagegevens
Titel
Effects of plantar fascia on first metatarsophalangeal joint stress in different foot types
Auteurs
Rajshree Mootanah
Khadija Saoudi
Joel Mazella
Antoine Truchetet
Jonathan Deland
Scott Ellis
Josh Baxter
Howard J Hillstrom
Publicatiedatum
01-04-2014
Uitgeverij
BioMed Central
Gepubliceerd in
Journal of Foot and Ankle Research / Uitgave bijlage 1/2014
Elektronisch ISSN: 1757-1146
DOI
https://doi.org/10.1186/1757-1146-7-S1-A58

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