Department of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China.
Med Biol Eng Comput. 2011 Feb;49(2):193-201. doi: 10.1007/s11517-010-0708-9. Epub 2010 Nov 17.
Very few finite element models of the cervical spine have been developed to investigate internal stress on the soft tissues under whiplash loading situation. In the present work, an approach was used to generate a finite element model of the head (C0), the vertebrae (C1-T1) and their soft tissues. The global acceleration and displacement, the neck injury criterion (NIC), segmental angulations and stress of soft tissues from the model were investigated and compared with published data under whiplash loading. The calculated acceleration and displacement agreed well with the volunteer experimental data. The peak NIC was lower than the proposed threshold. The cervical S- and C-shaped curves were predicted based on the rotational angles. The highest segmental angle and maximum stress of discs mainly occurred at C7-T1. Greater stress was located in the anterior and posterior regions of the discs. For the ligaments, peak stress was at anterior longitudinal ligaments. Each level of soft tissues experienced the greatest stress at the time of cervical S- and C-shaped curves. The cervical spine was likely at risk of hyperextension injuries during whiplash loading. The model included more anatomical details compared to previous studies and provided an understanding of whiplash injuries.
很少有研究针对挥鞭伤情况下软组织内部压力的颈椎有限元模型被开发出来。在本研究中，我们采用一种方法来建立头部（C0）、颈椎（C1-T1）及其软组织的有限元模型。我们对模型的整体加速度和位移、颈部损伤标准（NIC）、节段性角度和软组织的应力进行了研究，并与挥鞭伤情况下的已发表数据进行了比较。计算出的加速度和位移与志愿者的实验数据吻合较好。峰值 NIC 低于建议的阈值。基于旋转角度预测了颈椎 S 形和 C 形曲线。椎间盘的最大节段角度和最大应力主要发生在 C7-T1。椎间盘的前侧和后侧的应力更大。对于韧带，前纵韧带的峰值应力最大。在 S 形和 C 形曲线出现的时刻，每个软组织水平都经历了最大的应力。在挥鞭伤情况下，颈椎可能存在过度伸展损伤的风险。与之前的研究相比，该模型包含了更多的解剖细节，并有助于理解挥鞭伤。
