Viscoelastic properties of the ovine posterior spinal ligaments are strain dependent

Clinical Biomechanics
Sveva Ambrosetti-GiudiciJuergen Burger

Abstract

The biomechanical role of the posterior spinal ligaments for spinal stability has been stated in previous studies. The investigation of the viscoelastic properties of human lumbar spinal ligaments is essential for the understanding of physiological differences between healthy and degenerated tissues. The stress-relaxation behavior of biological tissues is commonly described with the quasi-linear viscoelastic model of Fung, which assumes that the stress-relaxation response is independent of the applied strain. The goal of this study was to investigate the stress-relaxation response of ovine posterior spinal ligaments at different elongations to verify the above-mentioned hypothesis. Twenty-four ovine lumbar spinal segments, consisting of only the supraspinous and interspinous ligaments and adjoining spinous processes, were elongated uniaxially to different strain levels within the physiological elastic region (5-20%). The experimental data were described with a non-linear viscoelastic model: the modified superposition method of Findley. A linear dependency of the relaxation rate to the applied strains was observed on intact segments, when both ligaments were considered, as well as on each individual ligament. This result can be ...Continue Reading

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Citations

Feb 8, 2013·Journal of Biomechanical Engineering·Kevin L TroyerChristian M Puttlitz
Dec 16, 2011·Clinical Biomechanics·Xiaopeng NingGary A Mirka
Jan 13, 2012·Journal of Biomechanics·Kevin L Troyer, Christian M Puttlitz
Sep 14, 2010·Acta Biomaterialia·Kevin L Troyer, Christian M Puttlitz
Aug 23, 2011·Acta Biomaterialia·Kevin L TroyerChristian M Puttlitz
May 17, 2015·Clinical Biomechanics·Xiaopeng Ning, Maury A Nussbaum
Aug 6, 2021·Journal of Biomechanical Engineering·Wenqiang LiuZhijie Wang

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