[1]卢熹,杨瑛.下颌骨-牙种植体有限元建模与瞬态分析[J].东南大学学报(自然科学版),2010,40(4):722-725.[doi:10.3969/j.issn.1001-0505.2010.04.011]
　Lu Xi,Yang Ying.Stress wave efforts of implant-bone under impact loading[J].Journal of Southeast University (Natural Science Edition),2010,40(4):722-725.[doi:10.3969/j.issn.1001-0505.2010.04.011]
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下颌骨-牙种植体有限元建模与瞬态分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第4期
页码:
722-725
栏目:
生物医学工程
出版日期:
2010-07-20

文章信息/Info

Title:
Stress wave efforts of implant-bone under impact loading
作者:
卢熹;  杨瑛
东南大学机械工程学院,南京 211189
Author(s):
Lu Xi;  Yang Ying
School of Mechanical Engineering, Southeast University, Nanjing 211189, China
关键词:
牙种植体;  下颌骨;  有限元;  冲击载荷;  应力波
Keywords:
dental implant;  mandible;  finite element;  impact loading;  stress wave
分类号:
R78
DOI:
10.3969/j.issn.1001-0505.2010.04.011
摘要:
通过逆向工程技术,将二维的下颌骨CT图片转化为三维有限元模型.根据CT图片像素的Hounsfield值将颌骨材料划分为10种材料属性,并建立含种植体的下颌骨有限元计算模型.以冲击载荷模拟牙齿咀嚼时的力作用,计算下颌骨-种植体在此冲击载荷作用下的响应:当应力波首次传到种植体-下颌骨界面时,在种植体上部第1圈螺纹的根部出现局部的应力峰值8.21MPa, 而当种植体-下颌骨的整体应变能达到最高峰时,在种植体的末端附近出现了全局应力峰值11.51MPa.静态和瞬态时的最大应力差超过40%,出现的位置也不同,由此可知,动态分析对种植牙的结构设计很重要.
Abstract:
By reverse engineering, the two-dimensional mandible CT(computed tomography)images were converted into a three-dimensional FE(finite element)model. The FE model’s material properties were taken into considerations according to the Hounsfield Units of original CT image pixels. The simulation of stress wave efforts of dental implant under impact loading were carried out. The Von mises stress reaches a local peak value of 8.21MPa when the stress wave first arrives at the mandible-implant interface. Whereas when the stress wave first bounces back after it reaches the end of the implant, the global peak value of the Von mises stress reaches 11.51MPa; The difference of maximum Von mises stress between static analysis and dynamic analysis is more than 40% and their locations are variable. That means it’s important to verify the dynamic properties of the dental implant as well as static properties.

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备注/Memo

备注/Memo:
作者简介: 卢熹(1968—),男,博士,副教授,seu-luxi@yahoo.com.cn.
引文格式: 卢熹,杨瑛.下颌骨-牙种植体有限元建模与瞬态分析[J].东南大学学报:自然科学版,2010,40(4):722-725. [doi:10.3969/j.issn.1001-0505.2010.04.011]
更新日期/Last Update: 2010-07-20