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Gepubliceerd in: Journal of Foot and Ankle Research 1/2008

Open Access 01-09-2008 | Keynote presentation

Sailing charted seas: biomechanics and the orthopedic surgeon

Auteur: George A Arangio

Gepubliceerd in: Journal of Foot and Ankle Research | bijlage 1/2008

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Introduction

Biomechanical models have been used to study the distribution of foot forces, metatarsal stresses, heel pad, arch height, plantar aponeurosis, subtalar joint, extrinsic muscles, medial displacement calcaneal osteotomy, subtalar arthroereisis and lateral column lengthening calcaneal osteotomy in the normal and flatfoot. We review past research data and discuss results as they relate to relevant clinical topics. [16]

Methods

A three dimensional multi-segment biomechanical model [7] was used with anatomical data from normal feet, feet made flat and corrected feet. The model includes a series of equations that describe how the foot deforms under a theoretical applied load of 683 Newtons (70 Kg.) on one foot in static stance phase

Results

Lateral Column Lengthening Calcaneal Osteotomy (LCL) decreases the forces needed by ligaments to resist moments at the medial arch joints by -79% and the talo-navicular Joint -63% in the flattened foot.
Table 1
Moments in Newton-meters (N-m)
Joint
Normal Nm
Flatfoot Nm
Flatfoot + LCL Nm
1st Metatarsal medial cuneiform
0.20
8.76
0.51
Medial – cuneiform navicular
0.33
14.48
0.84
Talo-navicular
5.61
21.63
8.05
(-63%)
Calcaneal-cuboid
5.69
0.00
7.72

Conclusion

The model has accurately predicted the deformation of the foot under a theoretical load of 683 Newtons. We have analyzed the effect of various surgical procedures on the flatfoot. We discussed the clinical relevance of the model data to the ankle sprain, 5th metatarsal stress fracture, posterior tibial tendon insufficiency, the flatfoot and the cavus foot.

Acknowledgement

Eric P Salathe Sr. PhD.
Open AccessThis article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://​creativecommons.​org/​licenses/​by/​2.​0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Literatuur
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go back to reference Arangio GA, et al: Clin Biomech. 2001, 16: 539-539. 10.1016/S0268-0033(01)00011-0. Arangio GA, et al: Clin Biomech. 2001, 16: 539-539. 10.1016/S0268-0033(01)00011-0.
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go back to reference Arangio GA, et al: Foot and Ankle Surgery. 1998, 4: 123-128. 10.1046/j.1460-9584.1998.00104.x.CrossRef Arangio GA, et al: Foot and Ankle Surgery. 1998, 4: 123-128. 10.1046/j.1460-9584.1998.00104.x.CrossRef
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go back to reference Salathe EP, et al: J Biomech Eng. 2002, 124: 241-281. 10.1115/1.1468865. Salathe EP, et al: J Biomech Eng. 2002, 124: 241-281. 10.1115/1.1468865.
Metagegevens
Titel
Sailing charted seas: biomechanics and the orthopedic surgeon
Auteur
George A Arangio
Publicatiedatum
01-09-2008
Uitgeverij
BioMed Central
Gepubliceerd in
Journal of Foot and Ankle Research / Uitgave bijlage 1/2008
Elektronisch ISSN: 1757-1146
DOI
https://doi.org/10.1186/1757-1146-1-S1-K2

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