不同颈缘设计类型瓷贴面的三维有限元分析  

The three- dimensional finite elements analysis of porcelain laminate veneers of different margin designs

作　　者：沈倍勇[1] 秦刚[1] 谢礼东[1] 梁芮[1] 周琦[1] 

机构地区：[1]广东省深圳市第二人民医院口腔科,518000

出　　处：《医学信息（下旬刊）》2011年第7期46-47,共2页Medical information

基　　金：2009年深圳市科技计划项目

摘　　要：目的：采用有限单元法计算不同颈缘设计的瓷贴面在不同载荷作用下的应力分布情况，井进行比较。方法：采用螺旋CT扫描离体上领中切牙，获取截面目像数据．用Pro～E软件建立三堆数据牙模型，模型上形成刃状肩台、凹型肩台、直角肩台三种不同颈缘的瓷贴面。应用大型通用有限元分析软件ANSYS对其进行受力分析。结果：三种不同的颈缘设计中。直角肩台在颈缘处客易出现应力集中，在实际瓷贴面外形设计中应尽量避免使用带有尖角的设计。另外，刃状肩台从应力分布的角度来看属于三者中比较好的形状设计．结论：瓷贴面的颈蝽轮廓应尽量使用田滑曲线.Objective： To study the stress distribution of porcelain laminate veneer with different designs of cervical margin of tooth under different loads. Methods： Using spiral CT to scan maxillary central incisors in vitro to get sectional image data. Built a three--dimensional dental model using the Pro--E software, and model porcelain laminate veneer with different designs on cervical margin included blade--like shoulder, concave shoulder and right --angle shoulder, then analyze the stress distribution of the of porcelain laminate veneer using the general--purpose finite analysis software ANSYS. Re- sults： The right--angle shoulder of the three different designs is prone to stress concentration. Porcelain laminate veneer with sharp corners should be a- voided in practice. On the other hand, blade--like shoulder of the three designs is the best in the perspective of stress distribution. Conclusion： The cervi- cal margin profile of porcelain laminate veneer should make full use of smooth curves.

关 键 词：瓷贴面 三维建模 有限元 

分 类 号：R782[医药卫生—口腔医学]