[1]钦斌,黄永火,欧阳羽,等.轴向应力作用下的舟骨有限元分析[J].第三军医大学学报,2010,32(11):1213-1215.
 Qin Bin,Huang Yonghuo,Ouyang Yu,et al.Finite element analysis in scaphoid bone under action of axial stress[J].J Third Mil Med Univ,2010,32(11):1213-1215.
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《第三军医大学学报》[ISSN:1000-5404/CN:51-1095/R]

卷:
32卷
期数:
2010年第11期
页码:
1213-1215
栏目:
论著
出版日期:
2010-06-15

文章信息/Info

Title:
Finite element analysis in scaphoid bone under action of axial stress
作者:
钦斌黄永火欧阳羽吕发金黄伟王仁崇甘强
重庆医科大学附属第一医院:放射科,骨科
Author(s):
Qin BinHuang YonghuoOuyang YuLU FajinHuang WeiWang RenchongGan Qiang
Department of Radiology, Department of Orthopedics, First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
关键词:
舟骨有限元分析生物力学
Keywords:
scaphoid finite element analysis biomechanics
分类号:
R318.01;R322.71;R323.71
文献标志码:
A
摘要:
目的    快速、准确建立舟骨有限元模型,分析其轴向应力下的力学分布。    方法     采用美国GE LightSpeed VCT(64排螺旋CT)对健康志愿者1例(男性,24岁,无腕部疾病史)扫描获取CT扫描图像,将12具尸体标本与Instron Model 1011型力学试验机相连接,扫描压敏图像,得到腕关节的受力面积和应力分布,通过CT扫描图像数据对腕部进行三维有限元建模,计算并分析舟骨受轴向压力作用下正常腕部载荷传递及接触应力的分布。将此实验数据及以往文献数据与有限元模型的数据进行对比以验证有限元模型的精确性。     结果    本模型构架了包括桡骨以及近端掌骨的腕部整体三维有限元模型,共有节点73 588个,单元39 7344个;桡舟关节面受力面积约为153.35 mm2,应力大小约为54.28 MPa,最大应力约为2.72 MPa,桡舟关节面受力面积约为90.00 mm2,受力大小约为45.72 MPa,最大应力约为3.45 MPa,舟骨载荷传递及关节接触应力分布情况与实验数据相接近。    结论    所建模型结构完整,空间结构准确,轴向压力作用下加载模拟形象、逼真,客观反映舟骨三维解剖形态结构和生物力学特点,本模型可以较好地模拟舟骨以及腕关节载荷传递与接触应力的分布情况。
Abstract:
Objective    To construct the model of finite elements in scaphoid bone and analyze its mechanic distribution under the action of axial stress.      Methods    CT images of a male volunteer at the age of 24 with no history of thoracic disease were obtained using GE LightSpeed VCT. Area under stress and distribution of stress in wrist joint were observed on pressure-sensitive images obtained by connecting 12 autopsy samples to the Instron 1011 mechanic text device.A 3-D model of finite elements in scaphoid bone was established using the CT imaging data. Normal load transfer in scaphoid bone and distribution of contact stress in wrist joint under the action of axial stress were calculated and analyzed. Experimental data were compared with those available from documented reports and from the model of finite elements in scaphoid bone to confirm the accuracy of the model established in this study.     Results    The 3-D model of finite elements in scaphoid bone, including 73 588 nodal points and 397 344 modules in proximal metacarpal and wrist bone, was established. The surface area of radial and scaphoid joint under stress was about 153.35 mm2 and 90.00 mm2 with a minimal stress of about 54.28  MPa and 45.72 MPa, and a maximal stress of about 2.72 MPa and 3.45 MPa, respectively. The load transfer in scaphoid bone and the distribution of contact stress in radial and scaphoid joint were similar to the experimental data.     Conclusion    The model we established in this study is characterized by the 3-D morphologic structure and biomechanics, and can thus simulate the scaphoid and wrist joint load transfer and the distribution of contact stress.

参考文献/References:

钦斌,黄永火,欧阳羽,等.轴向应力作用下的舟骨有限元分析[J].第三军医大学学报,2010,32(11):1213-1215.

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更新日期/Last Update: 2010-06-04