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Proceedings Paper

Modeling and optimization of an elastic arthroplastic disc for a degenerated disc
Author(s): Azadeh Ghouchani; Mohammad Ravari; Farid Mahmoudi
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Paper Abstract

A three-dimensional finite element model (FEM) of the L3-L4 motion segment using ABAQUS v 6.9 has been developed. The model took into account the material nonlinearities and is imposed different loading conditions. In this study, we validated the model by comparison of its predictions with several sets of experimental data. Disc deformation under compression and segmental rotational motions under moment loads for the normal disc model agreed well with the corresponding in vivo studies. By linking ABAQUS with MATLAB 2010.a, we determined the optimal Young s modulus as well as the Poisson's ratio for the artificial disc under different physiologic loading conditions. The results of the present study confirmed that a well-designed elastic arthroplastic disc preferably has an annulus modulus of 19.1 MPa and 1.24 MPa for nucleus section and Poisson ratio of 0.41 and 0.47 respectively. Elastic artificial disc with such properties can then achieve the goal of restoring the disc height and mechanical function of intact disc under different loading conditions and so can reduce low back pain which is mostly caused due to disc degeneration.

Paper Details

Date Published: 1 October 2011
PDF: 4 pages
Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82853M (1 October 2011); doi: 10.1117/12.914433
Show Author Affiliations
Azadeh Ghouchani, Amirkabir Univ. of Technology (Iran, Islamic Republic of)
Mohammad Ravari, Islamic Azad Univ. (Iran, Islamic Republic of)
Farid Mahmoudi, Amirkabir Univ. of Technology (Iran, Islamic Republic of)

Published in SPIE Proceedings Vol. 8285:
International Conference on Graphic and Image Processing (ICGIP 2011)
Yi Xie; Yanjun Zheng, Editor(s)

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