| 不同长度微种植体支抗应力差异的三维有限元研究 |
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| 引用本文： | 王震东,王林,倪晓宇,马俊青.不同长度微种植体支抗应力差异的三维有限元研究[J].口腔医学,2005,25(2):96-97. |
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| 作者姓名： | 王震东 王林 倪晓宇 马俊青 |
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| 作者单位： | 南京医科大学口腔医学院正畸科,南京,210029;东南大学机械系,南京,210029 |
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| 基金项目： | 江苏省卫生厅医学科技发展基金 (2 0 0 3 13 ) |
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| 摘 要： | 目的 分析不同长度微型种植体在承载不同方向4 0 0g正畸力时的应力分布和大小。方法 利用三维有限元软件ANSYS建立不同长度的微型支抗种植体-骨有限元非线性分析模型,在加载侧方力(与种植体长轴成4 5°和90°)的条件下进行分析计算。结果 ①在两种加载条件下,不同长度的微型种植体应力值(包括单元应力和节点应力)呈规则分布,均显示8mm长度时,应力值最小,并且随着微种植体长度的增加或减小,应力值都呈增加趋势;②种植体颈部为应力集中区。结论 在承受非轴向力的作用下,8mm微种植体颈部的应力值最低,并且随微种植体长度的变化,应力都呈上升趋势。
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| 关 键 词： | 应力 长度 微种植体支抗 三维有限元 |
| 文章编号： | 1003-9872(2005)02-0096-02 |
| 修稿时间： | 2004年8月25日 |
Research on 3-D FEM stresses around anchorage micro-implants with different length |
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| WANG Zhen-dong,WANG Lin,NI Xiao-yu,MA Jun-qing.Research on 3-D FEM stresses around anchorage micro-implants with different length[J].Stomatology,2005,25(2):96-97. |
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| Authors: | WANG Zhen-dong WANG Lin NI Xiao-yu MA Jun-qing |
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| Abstract: | Objective To investigate the stress around anchorage micro-implants with different length and select the appropriate micro-implant for orthodontic anchorage. Methods Three-dimensional element method (FEM) was used to analyze the stress around micro-implant with different length (5mm, 6mm, 7mm, 8mm, 9mm, 10mm), which was 400 grams loaded.The direction of the load was horizontal and 45 degree referring to the axis of micro-implant. Results ①The 8 mm micro-implant had mini-stress distribution and then the stress increased when the length of micro-implant changed;② the neck of micro-implant and the cortical bone were stress-focused areas. Conclusion The length can influence the stress around micro-implant. If possible, one should choose 8mm micro-implant or shorter. |
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| Keywords: | stress length micro-implant 3-D FEM |
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