Biomechanics of the C5-C6 spinal unit before and after placement of a disc prosthesis

Biomechanics and Modeling in Mechanobiology
Fabio GalbuseraRoberto Assietti

Abstract

The study consists of a biomechanical comparison between the intact C5-C6 spinal segment and the same segment implanted with the Bryan artificial disc prosthesis (Medtronic Ltd., Memphis, TN, USA), by the use of the finite element (FE) method. Our target is the prediction of the influence of prosthesis placement on the resulting mechanics of the C5-C6 spine unit. A FE model of the intact C5-C6 segment was built, employing realistic models of the vertebrae, disc and ligaments. Simulations were conducted imposing a compression preload combined to a flexion/extension moment, a pure lateral bending moment and a pure torsion moment, and the calculated results were compared to data from literature. The model was then modified to include the Bryan cervical disc prosthesis, and the simulations were repeated. The location of the instantaneous center of rotation (ICR) of C5 with respect to C6 throughout flexion/extension was calculated in both models. In general, the moment-rotation curves obtained from the disc prosthesis-implanted model were comparable to the curves obtained from the intact model, except for a slightly greater stiffness induced by the artificial disc. The position of the calculated ICRs was rather stable throughout fle...Continue Reading

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Citations

Nov 26, 2009·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Ahmad FaizanTai Friesem
Mar 13, 2012·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Simon G SjovoldPeter A Cripton
Mar 13, 2014·The Spine Journal : Official Journal of the North American Spine Society·Nicholas A WhiteJoel D Stitzel
Sep 10, 2014·The Spine Journal : Official Journal of the North American Spine Society·Sean M EsmendeJoseph J Crisco
Jul 19, 2008·Clinical Biomechanics·Fabio GalbuseraMaurizio Fornari
Mar 25, 2008·Medical Engineering & Physics·Fabio GalbuseraRoberto Assietti
Dec 17, 2014·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Shannon A ZirbelAnton E Bowden
Oct 14, 2019·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Hoon ChoiNarayan Yoganandan
Oct 14, 2020·Computer Methods in Biomechanics and Biomedical Engineering·Qing-Dong Wang, Li-Xin Guo

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