不同力作用下微种植体长度和直径的双变量优化分析
Selection of optimal length and diameter of mini implant in two different forces: a three-dimensional finite element analysis
作者：鲁颖娟 常少海 伍虹 余艳崧 叶玉珊 常岚茹 王为
Author：Lu Yingjuan, Chang Shaohai, Wu Hong, Yu Yansong, Ye Yushan, Chang Lanru, Wang Wei
收稿日期： 年卷（期）页码：2014,32(1):85-85-90
期刊名称：华西口腔医学杂志
Journal Name：West China Journal of Stomatology
关键字：有限元分析,微种植体,长度,直径,优化设计,
Key words：finite element analysis,mini implant,length, diameter,optimization,
基金项目：
中文摘要
目的 探讨在不同力作用下，长度和直径同时连续变化情况下微种植体尺寸的优化设计，以期为临床上合理选择微种植体尺寸提供理论基础。方法 建立长度和直径连续变化的微种植体及周围颌骨组织的三维有限元模型，设定长度变化范围为6~12 mm，直径变化范围为1.2~2.0 mm，在微种植体头部的横槽内分别加载水平力（HF）和复合力（ CF），观察长度和直径同时变化对周围颌骨等效应力峰值（ Max EQV）及微种植体位移峰值（ Max DM）的影响。结果 在两种力的作用下，随着长度和直径的增加，颌骨 Max EQV和微种植体 Max DM均下降，当长度大于 9 mm时，各评估指标值较小且变化幅度较小。灵敏度分析显示，直径对评估指标的影响较大。在 CF作用下，直径对评估指标的影响较 HF作用下显著。结论 在本研究所设定的参数范围内，微种植体的长度应不超过 9 mm，运用微种植体对牙齿进行转矩控制时，其直径应超过1.2 mm。
英文摘要
Objective To investigate the effect of different length and diameters on the stability of mini implant and to select optimal length and diameter using continuous variation of parameters.Methods To perform 3-dimensional finite element analysis, finite element models of a maxilla, and mini implants with length of 6-12 mm and diameters of 1.2-2.0 mm were generated. Load of two different forces were applied to the head of mini implant. One type was horizontal force (HF), the other was composite force (CF). The maximum equivalent stress (Max EQV) in maxilla and the maximum displacement (Max DM) of mini implant were evaluated.Results The Max EQV in maxilla and Max DM of mini implant decreased as length and diameter increased. When length was more than 9 mm, the evaluation indexes were small and had a less change. Datas indicated that diameter played a more important role in reducing target, and was a more effective parameter in re-ducing Max EQV when CF was loaded.Conclusion From biomechanical point of view, the choice of the length should not be more than 9 mm. When CF is loaded using the mini implant, diameter exceeding 1.2 mm are optimal design for mini implant.
上一条：shRNA干扰蛋白激酶D-2基因提高Tca8113对化疗药物的敏感性研究
【关闭】
