北京生物醫(yī)學(xué)工程

種植義齒相對高度對塞牙影響的有限元分析

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

作者：楊德圣喬愛科

單位：北京工業(yè)大學(xué)生命科學(xué)與生物工程學(xué)院(北京100124)

分類號：

出版年·卷·期（頁碼）：2012·31·6（556-559）

摘要：

目的探討種植義齒的相對高度位置對塞牙的影響，以期為臨床口腔醫(yī)生提供有益的參考。方法設(shè)計自然牙和義齒相對不同高度的4組實驗，簡化牙體組織進行建模和網(wǎng)格劃分，并模擬牙齒咀嚼時的狀態(tài)施加合理的邊界條件和加載條件，利用有限元方法分析牙齒和嵌塞物的形變。結(jié)果嵌塞物受力在0～5.5N范圍之內(nèi)時，種植義齒后的牙間縫隙小于自然牙狀態(tài)時的牙間縫隙，義齒低于自然牙是產(chǎn)生牙間縫隙最小的情況。結(jié)論嵌塞物受力在0～5.5N范圍之內(nèi)時，種植義齒后更易發(fā)生塞牙。義齒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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