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Ann Chir Plast Esthet. 2017 Dec;62(6):664-668. doi: 10.1016/j.anplas.2017.03.002. Epub 2017 Apr 3.

Comparison between isotropic linear-elastic law and isotropic hyperelastic law in the finite element modeling of the brachial plexus.

Author information

1
Department of hand surgery, SOS main, CCOM, university of Strasbourg, Icube CNRS 7357, university hospital of Strasbourg, FMTS, 10, avenue Baumann, 67403 Illkirch cedex, France.
2
Department of mechanics, university of Strasbourg/CNRS, ICUBE, 2, rue Boussingault, 67000 Strasbourg, France.
3
Guillaume Bierry, radiology department, university of Strasbourg, FMTS, 1, place de l'Hôpital, 67000 Strasbourg, France.
4
Department of hand surgery, SOS main, CCOM, university of Strasbourg, Icube CNRS 7357, university hospital of Strasbourg, FMTS, 10, avenue Baumann, 67403 Illkirch cedex, France. Electronic address: Philippe.liverneaux@chru-strasbourg.fr.

Abstract

Augmented reality could help the identification of nerve structures in brachial plexus surgery. The goal of this study was to determine which law of mechanical behavior was more adapted by comparing the results of Hooke's isotropic linear elastic law to those of Ogden's isotropic hyperelastic law, applied to a biomechanical model of the brachial plexus. A model of finite elements was created using the ABAQUS® from a 3D model of the brachial plexus acquired by segmentation and meshing of MRI images at 0°, 45° and 135° of shoulder abduction of a healthy subject. The offset between the reconstructed model and the deformed model was evaluated quantitatively by the Hausdorff distance and qualitatively by the identification of 3 anatomical landmarks. In every case the Hausdorff distance was shorter with Ogden's law compared to Hooke's law. On a qualitative aspect, the model deformed by Ogden's law followed the concavity of the reconstructed model whereas the model deformed by Hooke's law remained convex. In conclusion, the results of this study demonstrate that the behavior of Ogden's isotropic hyperelastic mechanical model was more adapted to the modeling of the deformations of the brachial plexus.

KEYWORDS:

Augmented reality; Biomechanical; Biomécanique; Brachial plexus; Finite element model; Modèle éléments-finis; Plexus brachial; Réalité augmentée

PMID:
28385568
DOI:
10.1016/j.anplas.2017.03.002
[Indexed for MEDLINE]

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