Quantitative comparison of ligament formulation and pre-strain in finite element analysis of the human lumbar spine

Mitchell S. Hortin and Anton E. Bowden

Computer Methods in Biomechanics and Biomedical Engineering, 2016, vol. 19, issue 14, 1505-1518

Abstract: Data has been published that quantifies the nonlinear, anisotropic material behaviour and pre-strain behaviour of the anterior longitudinal, supraspinous (SSL), and interspinous ligaments of the human lumbar spine. Additionally, data has been published on localized material properties of the SSL. These results have been incrementally incorporated into a previously validated finite element model of the human lumbar spine. Results suggest that the effects of increased ligament model fidelity on bone strain energy were moderate and the effects on disc pressure were slight, and do not justify a change in modelling strategy for most clinical applications. There were significant effects on the ligament stresses of the ligaments that were directly modified, suggesting that these phenomena should be included in FE models where ligament stresses are the desired metric.

Date: 2016
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DOI: 10.1080/10255842.2016.1159677

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