Dynamic effects of eifferent nail placement strategies on LenkeC scoliosis.

IF 1 4区医学 Q4 ENGINEERING, BIOMEDICAL

Bio-medical materials and engineering Pub Date : 2023-01-01 DOI:10.3233/BME-221409

Xianzheng Li, Rongchang Fu, Hui Wu, Yanli Sun

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引用次数: 0

Abstract

Background: Although the internal fixation technique for scoliosis is effective, there is a great risk of nail placement in actual operation.

Objective: To compare the effects of three different nail placement strategies on LenkeC patients with scoliosis under cyclic loading.

Methods: Firstly, the finite element model was established by using CT scanning images and X-ray images of patients with LenkeC scoliosis. Secondly, the validity of the model was verified. Finally, the harmonic response analysis and transient dynamic analysis were carried out.

Results: The results showed that the maximum amplitude of each vertebral body appeared in the Z direction at the third natural frequency and the amplitudes of each corresponding vertebral body were very close under three kinds of nail placement. Under different nail placement methods, the uneven distribution of nails would make the model produce obvious stress concentration, but the principal stress of vertebral body and nail rod was far lower than its own yield strength. This showed that under the axial cyclic load, the vertebral bodies of scoliosis tended to have larger impact in Z direction. From the point of view of dynamics, it was feasible to reduce a certain number of nails in operation.

Conclusion: This paper revealed that it was feasible to reduce a certain number of nails during surgery.

查看原文本刊更多论文

不同钉位策略对LenkeC脊柱侧凸的动态影响。

背景:虽然脊柱侧凸的内固定技术是有效的，但在实际手术中存在很大的钉入风险。目的:比较三种不同的钉位策略对LenkeC脊柱侧凸患者循环载荷作用的影响。方法:首先利用LenkeC型脊柱侧凸患者的CT扫描图像和x线图像建立有限元模型。其次，验证了模型的有效性。最后进行了谐波响应分析和暂态动力分析。结果:结果表明，在三种钉位方式下，各椎体的最大振幅出现在Z方向的第三个固有频率处，且各对应椎体的振幅非常接近。在不同的钉入方式下，钉的不均匀分布会使模型产生明显的应力集中，但椎体和钉棒的主应力远低于其自身的屈服强度。这说明在轴向循环载荷作用下，脊柱侧凸椎体在Z方向上的冲击更大。从动力学角度看，在操作中减少一定数量的钉是可行的。结论:术中减少一定数量的钉是可行的。

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

Bio-medical materials and engineering 工程技术-材料科学：生物材料

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The aim of Bio-Medical Materials and Engineering is to promote the welfare of humans and to help them keep healthy. This international journal is an interdisciplinary journal that publishes original research papers, review articles and brief notes on materials and engineering for biological and medical systems. Articles in this peer-reviewed journal cover a wide range of topics, including, but not limited to: Engineering as applied to improving diagnosis, therapy, and prevention of disease and injury, and better substitutes for damaged or disabled human organs; Studies of biomaterial interactions with the human body, bio-compatibility, interfacial and interaction problems; Biomechanical behavior under biological and/or medical conditions; Mechanical and biological properties of membrane biomaterials; Cellular and tissue engineering, physiological, biophysical, biochemical bioengineering aspects; Implant failure fields and degradation of implants. Biomimetics engineering and materials including system analysis as supporter for aged people and as rehabilitation; Bioengineering and materials technology as applied to the decontamination against environmental problems; Biosensors, bioreactors, bioprocess instrumentation and control system; Application to food engineering; Standardization problems on biomaterials and related products; Assessment of reliability and safety of biomedical materials and man-machine systems; and Product liability of biomaterials and related products.