Laville A, Laporte S, Skalli W
Arts et Metiers ParisTech, CNRS, LBM, 151 bd de l'Hopital, 75013 Paris, France; Institut de Médecine Aérospatiale du Service de Santé des Armées, Bretigny Sur Orge, France.
Arts et Metiers ParisTech, CNRS, LBM, 151 bd de l'Hopital, 75013 Paris, France.
J Biomech. 2009 Jul 22;42(10):1409-1415. doi: 10.1016/j.jbiomech.2009.04.007. Epub 2009 May 13.
Morphometrical and postural features of the cervical spine are supposed to significantly influence its biomechanical behaviour. However, the effects of these geometrical parameters are quite difficult to evaluate. An original numerical method is proposed in order to automatically generate parametric and subject-specific meshes of the lower cervical spine. Sixteen finite element models have been built from cadaver specimens using low dose biplanar X-rays. All the generated meshes fulfilled the quality criteria. A preliminary evaluation was performed on the C5-C6 functional units using a database of previous experimental tests. The principal and coupled motions were simulated. The responses of the numerical models were within the experimental standard deviation corridors in most cases. Rotation-moment relationships were then compared to assess the influence of geometry on the mechanical response. Geometry was found to play a significant role in the motion patterns.
颈椎的形态测量和姿势特征被认为会显著影响其生物力学行为。然而，这些几何参数的影响很难评估。为了自动生成下颈椎的参数化和个体化网格，提出了一种原始的数值方法。使用低剂量双平面X射线从尸体标本构建了16个有限元模型。所有生成的网格均符合质量标准。使用先前实验测试的数据库对C5-C6功能单元进行了初步评估。模拟了主要运动和耦合运动。在大多数情况下，数值模型的响应在实验标准差范围内。然后比较旋转力矩关系以评估几何形状对力学响应的影响。发现几何形状在运动模式中起着重要作用。
