Modeling and optimization of an elastic arthroplastic disc for a degenerated disc

Azadeh Ghouchani; Mohammad Ravari; Farid Mahmoudi

doi:10.1117/12.914433

1 October 2011 Modeling and optimization of an elastic arthroplastic disc for a degenerated disc

Azadeh Ghouchani, Mohammad Ravari, Farid Mahmoudi

Author Affiliations +

Proceedings Volume 8285, International Conference on Graphic and Image Processing (ICGIP 2011); 82853M (2011) https://doi.org/10.1117/12.914433
Event: 2011 International Conference on Graphic and Image Processing, 2011, Cairo, Egypt

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.

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Azadeh Ghouchani, Mohammad Ravari, and Farid Mahmoudi "Modeling and optimization of an elastic arthroplastic disc for a degenerated disc", Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82853M (1 October 2011); doi: 10.1117/12.914433; https://doi.org/10.1117/12.914433

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