骨水泥量及分布对椎体成形术后相邻椎体生物力学影响的三维有限元分析

目的利用三维有限元分析骨水泥量及分布对相邻椎体生物力学的影响。方法通过CT数据,利用Mimics10.0、Geomagic studio 11.0、Hyper Mesh l1.0、Abaqus 6.9有限元分析软件,建立骨质疏松性椎体模型,根据骨水泥量及分布方式建成有限元模型,施加载荷,测量相邻椎体应力分布变化情况。结果垂直载荷下,T12椎体皮质骨等效应力在单侧2 ml骨水泥灌注中较高为29.49 MPa;下终板所受应力在单侧偏中4 ml骨水泥灌注中较高为3.93 MPa。L2皮质骨等效应力在单侧骨水泥灌注较高为15.29 MPa;上终板所受应力在单侧偏中2 ml骨水泥灌注中较高为4.53 M...

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Published in中国骨质疏松杂志 Vol. 21; no. 1; pp. 29 - 33
Main Author 卢昌怀 刘志军 张宏波 常峥 王瑜 周伟平
Format Journal Article
LanguageChinese
Published 湖南常德市第一中医医院骨伤科脊柱病区 415000 2015
Subjects
有限元分析
椎体成形术
生物力学
骨水泥
生物力学
Biomechanics
有限元分析
Vertebroplasty
Bone cement
骨水泥
Finite element analysis
椎体成形术
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ISSN1006-7108

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Summary:目的利用三维有限元分析骨水泥量及分布对相邻椎体生物力学的影响。方法通过CT数据,利用Mimics10.0、Geomagic studio 11.0、Hyper Mesh l1.0、Abaqus 6.9有限元分析软件,建立骨质疏松性椎体模型,根据骨水泥量及分布方式建成有限元模型,施加载荷,测量相邻椎体应力分布变化情况。结果垂直载荷下,T12椎体皮质骨等效应力在单侧2 ml骨水泥灌注中较高为29.49 MPa;下终板所受应力在单侧偏中4 ml骨水泥灌注中较高为3.93 MPa。L2皮质骨等效应力在单侧骨水泥灌注较高为15.29 MPa;上终板所受应力在单侧偏中2 ml骨水泥灌注中较高为4.53 MPa。侧屈载荷下,T12椎体皮质骨所受等效应力在单侧偏中4 ml骨水泥灌注较高114.83 MPa;下终板所受应力在双侧骨水泥4 ml灌注中较高为8.62 MPa。L2椎体皮质骨所受等效应力在单侧偏中4 ml骨水泥中较高为96.41 MPa;上终板所受应力在单侧偏中4 ml骨水泥灌注中较高为9.80 MPa。旋转载荷下,T12椎体皮质骨所受等效应力在单侧2 ml骨水泥灌注中较高为119.42 MPa;下终板所受应力在单侧2 ml骨水泥灌注中较高为8.77 MPa。L2椎体皮质骨所受等效应力在单侧2 ml骨水泥灌注中较高为146.31 MPa;L2上终板所受应力在单侧2 ml骨水泥灌注中较高为7.84 MPa。结论骨水泥量及分布是相邻椎体发生骨折的一个重要因素,但与椎体所受力学载荷方向也密切相关。
Bibliography:LU Changhuai, LIU Zhijun, ZHANG Hongbo, Chang Zheng, Wang Yu, Zhou Weiping （Department of Orthopedics and Traumat01ogy, the First Hospital of Traditional Chinese Medicine in Changde, Changde 415000, China）
Vertebroplasty; Bone cement; Finite element analysis; Biomechanics
Objective To analyze the biomechanical effect of the volume and distribution of bone cement on the adjacent vertebrae using 3D finite analysis.Me thods Using Mimics 10.0,Geomagic studio 11.0,Hyper Mesh 11.0,and Abaqus 6.9softwares,a geometric reconstruction of the vertebral body was developed using the CT 3D reconstruction data.The finite model was established according to the volume and distribution of bone cement.The loading was performed to investigate the force distribution of the adjacent vertebrae.Re sults Under the vertical loading,the von Mises stress on the cortical bone of T12 was29.49 MPa in the unilateral 2 ml bone cement perfusion.The von Mises stress on the lower endplate was higher to 3.93 MPa in the unilateral across the midlin
ISSN:1006-7108