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Journal of Orthopaedic Surgery and Research

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Open Access 01-12-2024 | Lumbar Disc Herniation | Research article

Failure mechanical properties of lumbar intervertebral disc under high loading rate

Authors: Qing Liu, Xiao-Feng Liang, Ai-Guo Wang, Ying Liu, Tong-Ju Jia, Kun Li, Chun-Qiu Zhang

Published in: Journal of Orthopaedic Surgery and Research | Issue 1/2024

Abstract

Background

Lumbar disc herniation (LDH) is the main clinical cause of low back pain. The pathogenesis of lumbar disc herniation is still uncertain, while it is often accompanied by disc rupture. In order to explore relationship between loading rate and failure mechanics that may lead to lumbar disc herniation, the failure mechanical properties of the intervertebral disc under high rates of loading were analyzed.

Method

Bend the lumbar motion segment of a healthy sheep by 5° and compress it to the ultimate strength point at a strain rate of 0.008/s, making a damaged sample. Within the normal strain range, the sample is subjected to quasi-static loading and high loading rate at different strain rates.

Results

For healthy samples, the stress–strain curve appears collapsed only at high rates of compression; for damaged samples, the stress–strain curves collapse both at quasi-static and high-rate compression. For damaged samples, the strengthening stage becomes significantly shorter as the strain rate increases, indicating that its ability to prevent the destruction is significantly reduced. For damaged intervertebral disc, when subjected to quasi-static or high rates loading until failure, the phenomenon of nucleus pulposus (NP) prolapse occurs, indicating the occurrence of herniation. When subjected to quasi-static loading, the AF moves away from the NP, and inner AF has the greatest displacement; when subjected to high rates loading, the AF moves closer to the NP, and outer AF has the greatest displacement. The Zhu–Wang–Tang (ZWT) nonlinear viscoelastic constitutive model was used to describe the mechanical behavior of the intervertebral disc, and the fitting results were in good agreement with the experimental curve.

Conclusion

Experimental results show that, both damage and strain rate have a significant effect on the mechanical behavior of the disc fracture. The research work in this article has important theoretical guiding significance for preventing LDH in daily life.

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Title: Failure mechanical properties of lumbar intervertebral disc under high loading rate
Authors: Qing Liu
Xiao-Feng Liang
Ai-Guo Wang
Ying Liu
Tong-Ju Jia
Kun Li
Chun-Qiu Zhang
Publication date: 01-12-2024
Publisher: BioMed Central
Keywords: Lumbar Disc Herniation
Lumbar Disc Herniation
Published in: Journal of Orthopaedic Surgery and Research / Issue 1/2024
Electronic ISSN: 1749-799X
DOI: https://doi.org/10.1186/s13018-023-04424-x

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Failure mechanical properties of lumbar intervertebral disc under high loading rate

Abstract

Background

Method

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Method

Results

Conclusion

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