三种不同金属基底修复体堆瓷前后适合性的实验研究

An experimental study on the adaptation of porcelain fused-to-metal restorations made from three different alloys

目的:比较镍铬合金﹑贵金属合金和金沉积为基底的修复体在堆瓷前后的边缘浮出量,为临床应用提供一定的理论依据和指导。方法:用硅橡胶印模材料代替粘固剂将3组试件粘固于各自代型上,硬固后取下修复体,采用立式光学机测量硅橡胶的厚度,比较3组修复体在堆瓷前后不同部位的适合性,进行统计分析。结果:同种基底修复体在堆瓷前后适合性比较均无显著性差异(p>0.05);堆瓷前后不同基底修复体之间,金沉积﹑贵金属合金修复体均与镍铬合金修复体有显著性差异(p<0.05)。结论:堆瓷过程对3种修复体的适合性没有影响。

Objective： To compare the adaptation of porcelain fused-to-metal restorations made from Ni-Cr alloy, precious alloy and galvanized forming before and after piling porcelain, It can provide a certain theory guidanee.Method： The silicone rubber was used to cement the three kinds of crowns on their dies. The mean thickness of silicone rubber after cementation were measured in vitro using stereomicroscopo to compare adaptation of three kinds of crowns in different position before and after piling porcelain.Result： There were no significant difference in adaptation of same crowns between pro- and post- piling porcelain （P〉0.05）, while there were significant difference in between Ni-Cr and precious alloy and between Ni-Cr alloy and galvano-ceramic crowns （P〈0.05）.Conclusion：The process of piling porcelain has no influence on the adaptation of three kinds of crowns.