北京生物医学工程

种植义齿相对高度对塞牙影响的有限元分析

Finite element analysis on the effect of the relative height of planting denture on interdental food impaction

作者：杨德圣乔爱科

单位：北京工业大学生命科学与生物工程学院(北京100124)

分类号：

出版年·卷·期（页码）：2012·31·6（556-559）

摘要：

目的探讨种植义齿的相对高度位置对塞牙的影响，以期为临床口腔医生提供有益的参考。方法设计自然牙和义齿相对不同高度的4组实验，简化牙体组织进行建模和网格划分，并模拟牙齿咀嚼时的状态施加合理的边界条件和加载条件，利用有限元方法分析牙齿和嵌塞物的形变。结果嵌塞物受力在0～5.5N范围之内时，种植义齿后的牙间缝隙小于自然牙状态时的牙间缝隙，义齿低于自然牙是产生牙间缝隙最小的情况。结论嵌塞物受力在0～5.5N范围之内时，种植义齿后更易发生塞牙。义齿低于自然牙可更好地防止塞牙。

Objective To study the effect of planting denture’s relative height on interdental food impaction by using finite element method and provide helpful reference for dentists.Methods Four experimental groups were designed.Simplified tooth models were established and meshed.Loads were applied to the models and boundary conditions were constrained in the state of teeth chewing.Finite element method was employed to analyze the deformation of teeth and impacted object.Results When the force exerting on the impacted object was in the range of 0 to 5.5N,the distance between denture and tooth after planting denture was less than that between the normal teeth.The deformation was the minimum when the denture was lower than tooth.Conclusions When the force exerting on the impacted object is in the range of 0 to 5.5N,interdental food impaction is easier to occur after planting denture,and interdental food impaction may more likely be prevented when denture is lower than tooth.

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