用全颈椎有限元法对具有减震核心的人工椎间盘进行生物力学分析。

PubMed ID
G H
发表日期 2016年Aug月

原始出处 脊柱
Spine
作者 Lee  June Ho  Park  Won Man  Kim  Yoon Hyuk  Jahng  Tae-Ahn 

文献标题 用全颈椎有限元法对具有减震核心的人工椎间盘进行生物力学分析。
A Biomechanical Analysis of an Artificial Disc With a Shock-absorbing Core Property by Using Whole-cervical Spine Finite Element Analysis.
A Biomechanical Analysis of an Artificial Disc With a Shock-absorbing Core Property by Using Whole-cervical Spine Finite Element Analysis.

文献摘要 STUDY DESIGN

通过有限元模型建立反映C2以下颈椎的完整C2~C7节段、C5~C6节段植入融合器和三种不同人工椎间盘置换(adr)的生物力学比较。

OBJECTIVE

本研究旨在分析ADR后颈椎亚轴位的生物力学变化,并验证一种新型可移动核心人工椎间盘baguerac的减震效果。

SUMMARY OF BACKGROUND DATA

关于颈椎ADR装置的生物力学差异及其与临床结果的不同,很少有文献进行比较。

METHODS

将一个融合装置(CJ-cage系统,WINNOVA)和三个不同的颈椎人工椎间盘(Prodisc-cnova(DePuy Synthes)、Discocerv(Scient'x/Alphatec)、Baguera C(Spineart))插入有限元模型内的C5-6椎间盘空间,并进行分析。本研究采用混合加载条件,在弯曲、伸展、侧向弯曲和轴向旋转的弯矩为1 Nm的情况下,沿随动件加载方向施加50 N的压缩力。生物力学行为,如节段活动性,关节面关节力,和可能的磨损碎片现象内核。

RESULTS

ADR后,无论器械类型如何,节段运动和关节突关节力均增大。Baguera C仅在屈曲时模拟了完整的颈椎旋转中心的位置。与其他两种器件相比,该器件的接触面积分布更广,接触压力分布显著降低。根据具体的载荷条件,另外两个装置出现了“脱离”现象。

CONCLUSION

移动式核心人工椎间盘Baguera C在生物力学上优于其他装置,因为它不存在“提离”现象,并且在核心上的接触压力分布显著降低。

LEVEL OF EVIDENCE

药方:药方。


STUDY DESIGN

A biomechanical comparison among the intact C2 to C7 segments, the C5 to C6 segments implanted with fusion cage, and three different artificial disc replacements (ADRs) by finite element (FE) model creation reflecting the entire cervical spine below C2.

OBJECTIVE

The aim of this study was to analyze the biomechanical changes in subaxial cervical spine after ADR and to verify the efficacy of a new mobile core artificial disc Baguera C that is designed to absorb shock.

SUMMARY OF BACKGROUND DATA

Scarce references could be found and compared regarding the cervical ADR devices' biomechanical differences that are consequently related to their different clinical results.

METHODS

One fusion device (CJ cage system, WINNOVA) and three different cervical artificial discs (Prodisc-C Nova (DePuy Synthes), Discocerv (Scient'x/Alphatec), Baguera C (Spineart)) were inserted at C5-6 disc space inside the FE model and analyzed. Hybrid loading conditions, under bending moments of 1 Nm along flexion, extension, lateral bending, and axial rotation with a compressive force of 50 N along the follower loading direction, were used in this study. Biomechanical behaviors such as segmental mobility, facet joint forces, and possible wear debris phenomenon inside the core were investigated.

RESULTS

The segmental motions as well as facet joint forces were exaggerated after ADR regardless of type of the devices. The Baguera C mimicked the intact cervical spine regarding the location of the center of rotation only during the flexion moment. It also showed a relatively wider distribution of the contact area and significantly lower contact pressure distribution on the core than the other two devices. A "lift off" phenomenon was noted for other two devices according to the specific loading condition.

CONCLUSION

The mobile core artificial disc Baguera C can be considered biomechanically superior to other devices by demonstrating no "lift off" phenomenon, and significantly lower contact pressure distribution on core.

LEVEL OF EVIDENCE

N/A.

STUDY DESIGN

A biomechanical comparison among the intact C2 to C7 segments, the C5 to C6 segments implanted with fusion cage, and three different artificial disc replacements (ADRs) by finite element (FE) model creation reflecting the entire cervical spine below C2.

OBJECTIVE

The aim of this study was to analyze the biomechanical changes in subaxial cervical spine after ADR and to verify the efficacy of a new mobile core artificial disc Baguera C that is designed to absorb shock.

SUMMARY OF BACKGROUND DATA

Scarce references could be found and compared regarding the cervical ADR devices' biomechanical differences that are consequently related to their different clinical results.

METHODS

One fusion device (CJ cage system, WINNOVA) and three different cervical artificial discs (Prodisc-C Nova (DePuy Synthes), Discocerv (Scient'x/Alphatec), Baguera C (Spineart)) were inserted at C5-6 disc space inside the FE model and analyzed. Hybrid loading conditions, under bending moments of 1 Nm along flexion, extension, lateral bending, and axial rotation with a compressive force of 50 N along the follower loading direction, were used in this study. Biomechanical behaviors such as segmental mobility, facet joint forces, and possible wear debris phenomenon inside the core were investigated.

RESULTS

The segmental motions as well as facet joint forces were exaggerated after ADR regardless of type of the devices. The Baguera C mimicked the intact cervical spine regarding the location of the center of rotation only during the flexion moment. It also showed a relatively wider distribution of the contact area and significantly lower contact pressure distribution on the core than the other two devices. A "lift off" phenomenon was noted for other two devices according to the specific loading condition.

CONCLUSION

The mobile core artificial disc Baguera C can be considered biomechanically superior to other devices by demonstrating no "lift off" phenomenon, and significantly lower contact pressure distribution on core.

LEVEL OF EVIDENCE

N/A.


获取全文 10.1097/BRS.0000000000001468