采用体积轮廓扫描仪直接测量口腔印模材料的尺寸变化率  

Evaluatoin of the accuracy of 4 impression materials by a 3D optical scanner

作　　者：罗子源[1] 唐亮[1] 许晶晶[1] 刘迪生[1] 

机构地区：[1]暨南大学医学院口腔科,广州510632

出　　处：《实用口腔医学杂志》2015年第1期27-31,共5页Journal of Practical Stomatology

摘　　要：目的:测量4种临床常用EP模材的三维形变率。方法:制作母模及个别托盘,使用2种藻酸盐和2种橡胶EP模材在母模上分别制取EP模材试件(n=3),用三维轮廓测量扫描仪进行扫描及建模,通过计算机测量模型3个轴向上标记线段长度的变化。结果:在印模120 min后,Zhermark藻酸盐在3个轴向上的变化率分别为3.615%、3.037%、2.836%;CAVEX藻酸盐的变化率分别为2.836%、3.358%、4.276%;在印模8 h后,Impregum Penta聚醚橡胶在3个轴向上的变化率分别为0.039%、0.071%、0.057%;Express XT Penta H加成硅橡胶的变化率分别为0.033%、0.088%、0.084%。结论:4种材料线性尺寸变化率均达到ISO1563∶1990标准,藻酸盐类EP模材在3个轴向上的形变率均明显大于橡胶类EP模材。Objective：To study the 3D accuracy of 4 impression materials.Methods：A metal mould with a custom tray was prepared for the measurement.Impression samples of 2 alginate and 2 rubber impression materials were prepared in the metal mould（n =3）re-spectively.The length of three tagged lines,along X,Y,Z axis directions of the samples was measured with a 3D optical scanner.Re-sults：120 min after sampling the variable rates of the length along X,Y,Z axis of Zhermark alginate samples were 3.615%,3.037%and 2.836%,those of CAVEX alginate samples were 2.836%,3.358% and 4.276% respectively;8 h after sampling the variable rates of Impregum Penta polyether rubber samples were 0.039%,0.071% and 0.057%,those of ExpressXT Penta H addition-curing silicone rubber samples were 0.033%,0.088% and 0.084% respectively.Conclusion：The variable rates of the 4 impression materi-als are in accordance with ISO1563∶1990.The variable rate of alginate impression material is greater than that of rubber.

关 键 词：印模精度 三维测量 直接测量 

分 类 号：R783.1[医药卫生—口腔医学]