CAD/CAM两种设计方法对内冠形态的影响  

Influence of CAD/CAM Copings' Formed by Two Types of Design

作　　者：陈渊华[1] 柳正明[1] 翟家彬[1] 俞青[1] 

机构地区：[1]南京大学口腔医学院修复科,江苏南京210008

出　　处：《口腔医学研究》2013年第4期360-362,共3页Journal of Oral Science Research

摘　　要：目的:观察和比较2种设计方法所形成内冠的形态,寻找一种可以形成支持尖的方法。方法:收集后牙模型100例,扫描,选择生成内冠形式时,每个牙齿分别选择"Framework"功能和"Reduced"功能。生成内冠后,分别测量内冠的近中颊尖厚度、远中颊尖厚度、咬合面中点厚度、近中舌尖厚度、远中舌尖厚度。结果:回切法设计内冠的近中颊尖厚度为(1.06±0.34)mm,远中颊尖厚度为(0.95±0.21)mm,咬合面中点厚度为(0.92±0.15)mm,近中舌尖厚度为(0.83±0.27)mm,远中舌尖厚度为(0.97±0.33)mm,常规设计内冠的近中颊尖厚度为(0.63±0.07)mm,远中颊尖厚度为(0.64±0.07)mm,咬合面中点厚度为(0.66±0.04)mm,近中舌尖厚度为(0.61±0.04)mm,远中舌尖厚度为(0.65±0.07)mm。2组间存在显著性差异。结论:回切法设计的内冠可以形成支持尖。Objective： To evaluate the thickness of CAD/CAM copings designed by two differernt functions in order to find the way which can form ’supported area’.Methods： 100 casts which were perpared for CAD/CAM zirconia all-ceramic posteroteeth crowns were chosen.Casts were scaned and designed by Framework function and Reduced function.We cut the graph and measured the thickness of mesiobuccal cusp（MB）,distobuccal cusp（DB）,mesial fossa（O）,mesiolingual cusp（ML）,distolingual cusp（DL）.Results： In Reduced function group,the thickness of MB was（1.06±0.34）mm,DB was（0.95±0.21）mm,O was（0.92±0.15）mm,ML was（0.83±0.27）mm,DL was（0.97±0.33）mm.In Framework group,the thickness of MB was（0.63±0.07）mm,DB was（0.64±0.07）mm,O was（0.66±0.04）mm,ML was（0.61±0.04）mm,DL was（0.65±0.07）mm.There were significant difference between the two groups.Conclusion： The copings designed by the Reduced function can form ’supported area’.

关 键 词：CAD CAM 回切 形态 

分 类 号：R783.2[医药卫生—口腔医学]