不同弹性模量的瓷材料对三型瓷贴面复合体应力影响的比较研究  

Comparative Study of the Effect on Stress Distribution of Porcelain Laminate Complex with Different Elastic Moduli

作　　者：巢永烈[1] 于海洋[1] 罗云[1] 孟玉坤[1] 杜传诗[1] 

机构地区：[1]华西医科大学口腔医学院口腔修复教研室

出　　处：《华西医科大学学报》1999年第1期19-22,共4页Journal of West China University of Medical Sciences

摘　　要：为研究瓷贴面复合体应力分布规律，作者用切片法建立上颌左侧恒中切牙的三维有限元模型，研究３种瓷贴面复合体的应力分布，结果发现在模拟正中牙合加载时，增加瓷贴面弹性模量的瓷贴面复合体各部分应力略有增加，但影响不大；而模拟前伸牙合加载时，Ⅱ型瓷贴面复合体的应力值增高以高弹性模量材料尤甚，提示采用Ⅱ型瓷贴面设计时不宜选用高弹性模量材料。Porcelain laminate has been a kind of popular treatment modality for its aesthetics and less tooth reduction. The models of 3 D FEA of left upper permanent central incisor were designed by microtomy. Comparative studies of stress distribution were carried out to reveal the stress of three designs of tooth preparation with two kinds of occlusions. The results showed that under loads imitating of central occlusion, the stress level increased a little with the rising of elastic modulus of the porcelain material, while the stress values of type Ⅱveneer seemed the highest under loads imitating of protruding occlusion. For the designing of laminate, it implies that porcelain material with low elastic modulus should be used in case of type Ⅱ veneers.

关 键 词：三维有限元 应力 牙科材料 位移 瓷贴面 

分 类 号：R783.1[医药卫生—口腔医学]