Biomechanical effect of vibration on the fused lumbar spine with different stabilizers

IF 1.3 4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Bioinspired Biomimetic and Nanobiomaterials Pub Date : 2023-02-24 DOI:10.1680/jbibn.21.00020
Wei Fan, Chi Zhang, Dan Zhan, Li-Xin Guo
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Abstract

This study aimed to compare effect of whole-body vibration on biomechanics of fused lumbar spine with different posterior stabilizers, including interspinous process spacer (IPS) and bilateral pedicle screw system (BPSS). Finite element model of lumbar interbody fusion with IPS or BPSS at L4–L5 level was constructed based on a healthy human whole lumbar spine. Transient dynamic and static analyses were employed to compute dynamic responses of deformation and stress for the models to a sinusoidal axial vibration load of ±40 N and its corresponding static axal loads (−40 N and 40 N), respectively. The results showed that for both the IPS and BPSS models, vibration amplitudes of the responses were significantly higher than corresponding changing amplitudes under static loads. The increasing effect of vibration load in endplate stress at L4–L5 reached 128.3% and 146.0% for IPS and BPSS models. By contrast, the increasing effects of vibration load in disc bulge and annulus stress at adjacent L3–L4 were nearly the same for these two models. It indicates that vibration sensitivity of fused level is lower when using IPS compared with BPSS, but there is no obvious difference in vibration sensitivity of adjacent level when using these two stabilizers.
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不同稳定器对融合腰椎振动的生物力学影响
本研究旨在比较全身振动对不同后路稳定器(包括棘突间间隔器(IPS)和双侧椎弓根螺钉系统(BPSS))融合腰椎生物力学的影响。以健康人全腰椎为模型,建立L4-L5椎间融合IPS或BPSS有限元模型。采用瞬态动静态分析方法,分别计算了模型在±40 N正弦轴向振动载荷和相应的静轴向载荷(−40 N和40 N)作用下的动态变形和应力响应。结果表明:无论是IPS模型还是BPSS模型,在静载作用下,响应的振动幅值都明显高于相应的变化幅值;振动载荷对l4 ~ l5端板应力的增加作用在IPS和BPSS模型中分别达到128.3%和146.0%。相比之下,两种模型的振动载荷对圆盘凸起和相邻L3-L4环空应力的增加作用几乎相同。结果表明,与BPSS相比,使用IPS时熔合层的振动灵敏度较低,而使用两种稳定剂时相邻层的振动灵敏度无明显差异。
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来源期刊
Bioinspired Biomimetic and Nanobiomaterials
Bioinspired Biomimetic and Nanobiomaterials ENGINEERING, BIOMEDICAL-MATERIALS SCIENCE, BIOMATERIALS
CiteScore
2.20
自引率
0.00%
发文量
12
期刊介绍: Bioinspired, biomimetic and nanobiomaterials are emerging as the most promising area of research within the area of biological materials science and engineering. The technological significance of this area is immense for applications as diverse as tissue engineering and drug delivery biosystems to biomimicked sensors and optical devices. Bioinspired, Biomimetic and Nanobiomaterials provides a unique scholarly forum for discussion and reporting of structure sensitive functional properties of nature inspired materials.
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