A finite element study of posteroanterior lumbar mobilization on elderly vertebra geometry

2018 11th Biomedical Engineering International Conference (BMEiCON) Pub Date : 2018-11-01 DOI:10.1109/BMEICON.2018.8609999

Chadapa Boonyoung, A. Kwanyuang, S. Chatpun

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引用次数: 2

Abstract

The applying posteroanterior (PA) load through the spinous process of the vertebral bone is one of the methods for assessment and treatment for back pain in physical therapy. Central PA mobilization is crucial to be investigated the harmful effect on osteoporotic vertebral bone. Therefore, the objective of our study was to investigate the effect of PA load on elderly L1 lumbar vertebra geometry with different bone properties. The finite element model of L1 vertebra was generated from elderly computed tomography images. A 100 N PA load was applied at posterior aspect of spinous process of L1 vertebra in two different homogeneous material properties; (1) healthy L1, (2) osteoporotic L1. The distribution of von Mises stresses and minimum principal strains in mid-transverse sections of L1 vertebra was determined. The results revealed that PA load caused higher values of stresses and strains at pedicles and laminae in transverse section of L1 vertebra. Moreover, changing the elastic modulus influenced stresses and strains distributions in transverse sections of L1 vertebra. In conclusion, applying PA force through spinous process tends to cause a crack initiation at pedicles and laminae in L1 elderly vertebra.

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腰椎后前位活动对老年椎体几何的有限元研究

通过椎体棘突施加后前路负荷是物理治疗中评估和治疗背痛的方法之一。中央PA移位对骨质疏松性椎体骨的危害研究至关重要。因此，我们的研究目的是探讨PA负荷对具有不同骨特性的老年L1腰椎几何形状的影响。L1椎体有限元模型由老年人计算机断层图像生成。采用两种不同均质材料对L1椎棘突后侧施加100 N PA载荷;(1)健康L1，(2)骨质疏松L1。测定了L1椎体中横截面von Mises应力和最小主应变的分布。结果表明，PA载荷使L1椎体横切面椎弓根和椎板处的应力和应变值升高。此外，改变弹性模量会影响L1椎体横截面的应力和应变分布。综上所述，通过棘突施加PA力容易导致L1老年性椎体椎弓根和椎板产生裂纹。

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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2018 11th Biomedical Engineering International Conference (BMEiCON)

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