Comparison between isotropic linear-elastic law and isotropic hyperelastic law in the finite element modeling of the brachial plexus.
Ann Chir Plast Esthet
; 62(6): 664-668, 2017 Dec.
Article
in En
| MEDLINE
| ID: mdl-28385568
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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Brachial Plexus
/
Magnetic Resonance Imaging
/
Finite Element Analysis
/
Elasticity
/
Healthy Volunteers
Type of study:
Qualitative_research
Limits:
Humans
Language:
En
Journal:
Ann Chir Plast Esthet
Year:
2017
Document type:
Article
Affiliation country:
Francia