Trajkovski Ana, Omerovic Senad, Krasna Simon, Prebil Ivan
The Chair of Modelling in Engineering Sciences and Medicine, Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia.
Acta Bioeng Biomech. 2014;16(3):13-20.
Mechanical properties of cervical spine ligaments are of great importance for an accurate finite element model when analyzing the injury mechanism. However, there is still little experimental data in literature regarding fresh human cervical spine ligaments under physiological conditions. The focus of the present study is placed on three cervical spine ligaments that stabilize the spine and protect the spinal cord: the anterior longitudinal ligament, the posterior longitudinal ligament and the ligamentum flavum. The ligaments were tested within 24-48 hours after death, under two different loading rates. An increase trend in failure load, failure stress, stiffness and modulus was observed, but proved not to be significant for all ligament types. The loading rate had the highest impact on failure forces for all three ligaments (a 39.1% average increase was found). The observed increase trend, compared to the existing increase trends reported in literature, indicates the importance of carefully applying the existing experimental data, especially when creating scaling factors. A better understanding of the loading rate effect on ligaments properties would enable better case-specific human modelling.
在分析损伤机制时，颈椎韧带的力学性能对于精确的有限元模型至关重要。然而，关于生理条件下新鲜人体颈椎韧带的实验数据在文献中仍然很少。本研究的重点放在稳定脊柱和保护脊髓的三条颈椎韧带上：前纵韧带、后纵韧带和黄韧带。这些韧带在死后24 - 48小时内，在两种不同加载速率下进行测试。观察到破坏载荷、破坏应力、刚度和模量有增加趋势，但对所有韧带类型而言并不显著。加载速率对所有三条韧带的破坏力影响最大（平均增加39.1%）。与文献中报道的现有增加趋势相比，观察到的增加趋势表明了谨慎应用现有实验数据的重要性，尤其是在创建缩放因子时。更好地理解加载速率对韧带性能的影响将有助于进行更好的针对具体病例的人体建模。
