Quantifying the ranges of relative motions of the intervertebral discs and facet joints in the normal cervical spine
Quantifying the ranges of relative motions of the intervertebral discs and facet joints in the normal cervical spine
复制标题
DOI：
10.1016/j.jbiomech.2020.110023
复制
发表时间：
2020-11-09
影响因子：
2.4
通讯作者：
Cha, Thomas
中科院分区：
文献类型：
--
作者：
Wang, Haiming;Zhou, Chaochao;Cha, Thomas
功能性颈部运动是通过颈椎节段实现的，每个颈节节由一个椎间盘（IVD）和两个小关节（FJ）组成。使用双平面透视成像，我们研究了 18 名无症状受试者的颈椎三个关节（从 C3 到 C7）的运动范围 (ROM)。检查了三种功能性颈部运动，包括屈曲伸展（FE）、侧向弯曲（LB）和轴向扭转（AT）。我们的测量结果表明，在所有颈部运动过程中，IVD 和 FJ 的平移主要发生在矢状面，并且在所有节段，IVD 的前后平移均显着小于相应 FJ 的前后平移 (p < 0.05)。例如，C3/4 处的 IVD 和 FJ 前后平移范围在 FE 中为 2.7 +/- 0.7 mm 对比 3.5 +/- 1.1 mm，在 LB 中为 0.9 +/- 0.5 mm 对比 4.6 +/- 1.1 mm，在 AT 中为 1.0 +/- 0.5 mm 对比 3.1 +/- 1.0 mm。此外，我们引入了 IVD-FJ 翻译比率，它表示 IVD 与 FJ 翻译 ROM 的比率。在FE颈部运动中，IVD-FJ前后平移比从C3处的0.81+/-0.18下降到C3处的0.52+/-0.19，表明与FJ相比，从近端到远端，IVD的阻力逐渐增加。在 LB 颈部运动中，前后平移和左右平移的最小 IVD-FJ 平移比（0.14 +/- 0.09 和 0.43 +/- 0.30）均发生在 C4/5。在AT颈部运动中，最大的IVD-FJ前后平移比（0.42+/-0.21）发生在C3/4处，并且与C4/5和C5/6处显着不同（p < 0.05）。这些数据可以作为改进保留运动的颈椎治疗方法的参考，旨在实现IVD和平移运动的正常范围。 (C) 2020 Elsevier Ltd. 保留所有权利。
Functional neck motion is achieved by the cervical segments with each composed of an intervertebral disc (IVD) and two facet joints (FJs). Using biplane fluoroscopic imaging, we investigated the ranges of motion (ROMs) of the three joints in the cervical spines (from C3 to C7) of eighteen asymptomatic subjects. Three functional neck motions were examined, including flexion-extension (FE), lateral bending (LB) and axial twisting (AT). Our measurements showed that the translations of both IVD and FJs primarily occurred in the sagittal plane during all neck motions, and the anteroposterior translations of IVDs were significantly smaller than those of the corresponding FJs (p < 0.05) at all segments. For example, the ranges of IVD and FJ anteroposterior translations at C3/4 were 2.7 +/- 0.7 mm vs. 3.5 +/- 1.1 mm in FE, 0.9 +/- 0.5 mm vs. 4.6 +/- 1.1 mm in LB, and 1.0 +/- 0.5 mm vs. 3.1 +/- 1.0 mm in AT. Furthermore, we introduced an IVD-FJ translation ratio, which represents the ratio of the IVD to FJ translational ROMs. In FE neck motion, the IVD-FJ anteroposterior translation ratios decreased from 0.81 +/- 0.18 at C3 to 0.52 +/- 0.19 at C3, indicating gradually increasing resistances of IVDs compared to FJs from the proximal to distal levels. In LB neck motion, the smallest IVD-FJ translation ratios (0.14 +/- 0.09 and 0.43 +/- 0.30) occurred at C4/5 for both anteroposterior and left-right translations. In AT neck motion, the largest IVD-FJ anteroposterior translation ratio (0.42 +/- 0.21) occurred at C3/4, and was significantly different from those at C4/5 and C5/6 (p < 0.05). These data could be used as references for improving motion-preserving cervical treatment methods that aimed to achieve the normal ranges of translational motions of both IVD and FJs. (C) 2020 Elsevier Ltd. All rights reserved.