颈椎前路稳定系统的比较研究——有限元分析。

PubMed ID
G H
发表日期 2016年Feb月

原始出处 临床生物力学(布里斯托尔,雅芳)
Clinical biomechanics (Bristol, Avon)
作者 Mackiewicz  A  Banach  M  Denisiewicz  A  Bedzinski  R 

文献标题 颈椎前路稳定系统的比较研究——有限元分析。
Comparative studies of cervical spine anterior stabilization systems--Finite element analysis.
Comparative studies of cervical spine anterior stabilization systems--Finite element analysis.

文献摘要 BACKGROUND

本研究的目的是评估颈椎一级稳定对静态和动态钢板的影响。对颈椎C2-C6节段进行了研究,确定了植入区和相邻运动节段的应力场和应变场。目的是比较影响单个稳定剂的变化。

METHODS

为了测试,我们使用了有限元分析。颈椎模型考虑了局部脊柱融合术。这项研究包括一个完整的解剖模型和一个种植体稳定模型。

FINDINGS

分析涵盖了模型在运动过程中在矢状面上加载1nm的力矩。我们比较了整个片段C2-C6的模拟响应和单个运动片段的响应。最大运动范围限制发生在植入静态钢板后。研究还表明,一级稳定的引入导致相邻节段椎间盘终板的应力增加。

INTERPRETATION

结果表明,由硬化引起的应力增加可能导致骨结构重建的紊乱。动态接骨板的使用改善了受试脊柱的连续性应变,从而导致了与生理状态最相似的重塑,并降低了相邻节段的应力。


BACKGROUND

The object of the study was to assess the impact of one-level stabilization of the cervical spine for both anterior static and dynamic plates. Segments C2-C6 of the cervical spine, were investigated, from which was determined the stress and strain fields in the region of implantation and adjacent motion segments. The purpose was the comparison of changes that affect the individual stabilizers.

METHODS

For testing we used finite element analysis. The cervical spine model takes into account local spondylodesis. The study includes both an intact anatomical model and a model with implant stabilization.

FINDINGS

The analysis covered the model loaded with a moment of force for 1 Nm in the sagittal plane during movement. We compared both the modeled response of the whole fragment C2-C6 and the response of individual motion segments. The largest limitation of range of motion occurred after implantation with static plates. The study also showed that the introduction of the one-level stabilization resulted in an increase in stress in intervertebral disc endplates of adjacent segments.

INTERPRETATION

The results indicate that the increase in stress caused by stiffening may result in disorders in remodeling of bone structures. The use of dynamic plates showed improved continuity strains in the tested spine, thereby causing remodeling most similar to the physiological state and reducing the stresses in adjacent segments.

BACKGROUND

The object of the study was to assess the impact of one-level stabilization of the cervical spine for both anterior static and dynamic plates. Segments C2-C6 of the cervical spine, were investigated, from which was determined the stress and strain fields in the region of implantation and adjacent motion segments. The purpose was the comparison of changes that affect the individual stabilizers.

METHODS

For testing we used finite element analysis. The cervical spine model takes into account local spondylodesis. The study includes both an intact anatomical model and a model with implant stabilization.

FINDINGS

The analysis covered the model loaded with a moment of force for 1 Nm in the sagittal plane during movement. We compared both the modeled response of the whole fragment C2-C6 and the response of individual motion segments. The largest limitation of range of motion occurred after implantation with static plates. The study also showed that the introduction of the one-level stabilization resulted in an increase in stress in intervertebral disc endplates of adjacent segments.

INTERPRETATION

The results indicate that the increase in stress caused by stiffening may result in disorders in remodeling of bone structures. The use of dynamic plates showed improved continuity strains in the tested spine, thereby causing remodeling most similar to the physiological state and reducing the stresses in adjacent segments.


获取全文 10.1016/j.clinbiomech.2015.11.016