Three-dimensional finite element analysis of a novel interzygapophyseal fusion device for lower cervical spine.

IF 0.8 4区医学 Q4 BIOPHYSICS

Acta of bioengineering and biomechanics Pub Date : 2022-01-01

Q I Wang, Hong Yuan, Mingming Guo, Lingzhi Meng, Zuoyao Long, Y U Long, Huifeng Yang

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引用次数: 0

Abstract

Purpose: A three-dimensional finite element model of the lower cervical spine was established to evaluate the biomechanical stability and stress distribution of the new lower cervical interzygapophyseal fusion device (IZFD) developed by ourselves under different construct. The aim of this study was to provide theoretical basis for further clinical application.

Methods: A normal fresh cadaveric specimen (male, 35 years old) was used to establish an intact three-dimensional finite element model of C3-C6. On this basis, the comparative finite element models of the lateral mass screw rod (LMSR) system and LMSR+IZFD were established. Only C4-C5 is fixed in the lateral mass. The range of motion (ROM) and stress distribution in the flexion,extension, lateral bending and rotation of the C4-C5 segment under the three constructs were analyzed.

Results: The ROM and stress distribution of the three-dimensional finite element model under load construct were within a reasonable range, which proved the validity and reliability of the model. The ROM and stress distribution of C4-C5 segment was significantly decreased in both LMSR and LMSR+IZFD constructs than those in the intact construct. The ROM and stresss distribution were even smaller in LMSR+IZFD construct than in LMSR construct.

Conclusions: The IZFD combined with LMSR system can provide satisfactory stability for the lower cervical spine, and the IZFD can further improve the fixation effect of the LMSR system.

本刊更多论文

新型下颈椎颧骨间融合器的三维有限元分析。

目的：建立下颈椎的三维有限元模型，以评估自己开发的新型下颈椎颧骨间融合器（IZFD）在不同结构下的生物力学稳定性和应力分布。本研究旨在为进一步的临床应用提供理论依据：方法：采用正常新鲜尸体标本（男性，35 岁）建立 C3-C6 完整的三维有限元模型。在此基础上，建立了侧向质量螺钉杆（LMSR）系统和 LMSR+IZFD 的比较有限元模型。只有 C4-C5 固定在外侧质量上。分析了三种结构下 C4-C5 节段屈曲、伸展、侧弯和旋转的运动范围（ROM）和应力分布：结果：三维有限元模型在负荷结构下的运动范围和应力分布均在合理范围内，证明了模型的有效性和可靠性。LMSR和LMSR+IZFD结构下C4-C5节段的ROM和应力分布明显低于完整结构下的ROM和应力分布。LMSR+IZFD结构的ROM和应力分布甚至小于LMSR结构：结论：IZFD 与 LMSR 系统相结合可为下颈椎提供令人满意的稳定性，且 IZFD 可进一步改善 LMSR 系统的固定效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta of bioengineering and biomechanics BIOPHYSICS-ENGINEERING, BIOMEDICAL

CiteScore

2.10

自引率

10.00%

发文量

期刊介绍： Acta of Bioengineering and Biomechanics is a platform allowing presentation of investigations results, exchange of ideas and experiences among researchers with technical and medical background. Papers published in Acta of Bioengineering and Biomechanics may cover a wide range of topics in biomechanics, including, but not limited to: Tissue Biomechanics, Orthopedic Biomechanics, Biomaterials, Sport Biomechanics.