Uncinate processes and Luschka joints influence the biomechanics of the cervical spine: Quantification using a finite element model of the C5-C6 segment
Uncinate processes and Luschka joints influence the biomechanics of the cervical spine: Quantification using a finite element model of the C5-C6 segment
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DOI：
10.1002/jor.1100150305
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发表时间：
1997-05-01
影响因子：
2.8
通讯作者：
Scifert, J
中科院分区：
文献类型：
--
作者：
Clausen, JD;Goel, VK;Scifert, J
为了研究钩突和 Luschka 关节的生物力学意义，开发并验证了人体脊柱 C5-C6 运动节段的全三维有限元模型。对原始完整颈椎模型进行了修改，创建了两个附加模型。第一个模型通过用连续的纤维环代替裂隙并保持钩突完好无损来模拟 Luschka 关节的缺失。第二个模型模拟钩突的手术切除，同时保持 Luschka 关节完整。将这两个模型的结果与作为基线的完整模型进行比较；因此，确定了这些 mio 结构对颈椎运动的相对贡献。通过使用我们的模型，首次可以提供有关下颈椎耦合运动来源的定量数据。根据 Zn 原理，该模型的结果支持 Penning 和 Wilmink 的假设。我们的结果表明，小面关节和 Luschka 关节是下颈椎耦合运动的主要贡献者，钩突有效地减少了运动耦合和初级颈椎运动（与负载施加方向相同的运动），特别是在响应轴向旋转和侧向弯曲负载时。 Luschka 关节似乎可以增加初级颈椎运动，显示出与钩突相反的对颈椎运动的影响。外科医生应该意识到伴随着钩突切除的运动增加。
A fully three-dimensional finite element model of a C5-C6 motion segment of the human spine was developed and validated for the purpose of investigating the biomechanical significance of uncinate processes and Luschka joints, The original intact cervical model was modified to create two additional models. The first simulated the absence of Luschka joints by replacing the fissures with continuous annulus fibrosus and leaving the uncinate processes intact. The second model simulated a surgical resection of the uncinate processes, while leaving the Luschka joints intact, The results of these two models were compared with the intact model, which served as a baseline; thus, the relative contributions of these mio structures to cervical motion were established, With use of our model, it was possible, for the first time, to provide quantitative data concerning the source of coupled motions in the lower cervical spine. Zn principle, the results from this model support the hypothesis of Penning and Wilmink, Our results indicate that the facet joints and Luschka joints are the major contributors to coupled motion in the lower cervical spine and that the uncinate processes effectively reduce motion coupling and primary cervical motion (motion in the same direction as load application), especially in response to axial rotation and lateral bending loads. Luschka joints appear to increase primary cervical motion, showing an effect on cervical motion opposite to that of the uncinate processes. Surgeons should be aware of the increase in motion accompanied by resection of the uncinate processes.