饰瓷对不同材料基底冠边缘适合性的影响  

The effect of veneer on the marginal fit of the copings using different materials

作　　者：邬烈[1] 骆小平[1] 舒成军[1] 

机构地区：[1]江苏省南京市口腔医院修复科,210008

出　　处：《实用口腔医学杂志》2007年第3期333-336,共4页Journal of Practical Stomatology

基　　金：江苏省"135"重点人才基金资助(编号:2002008)

摘　　要：目的:比较金合金、纯钛、镍铬合金基底冠饰瓷前后的冠边缘适合性的变化以及临床意义。方法:在按统一标准机加工预备的树脂基牙模型上分别制作3组共24个全冠蜡形,严格按金合金、纯钛以及镍铬合金3种材料的要求分别进行铸造。对所得铸件在就位完全后,分别测量基底冠的颊侧、远中、腭侧以及近中边缘中点至基牙预备终止线的垂直距离,然后分别以相匹配的瓷粉饰瓷,再测量上述4点,得到饰瓷后的边缘间隙数据。以金合金组为对照组,纯钛组和镍铬合金组为实验组,用SAS统计软件对测量所得数据进行统计学分析。结果:金合金、纯钛以及镍铬合金各组饰瓷后4个点位的边缘间隙较饰瓷前均有明显的增大,各组差值有统计学差异,其中纯钛组4点间隙差值明显小于镍铬合金组和金合金组,而镍铬合金组与金合金组之间4点的间隙差值无明显差异。以上3组的饰瓷后的各点边缘间隙均小于120μm。结论:饰瓷对纯钛基底冠边缘适合性的影响最小。3组基底冠饰瓷后的冠边缘适合性均在临床可接受的范围内。Objective：To compare the marginal fit changes between after- and before-veneering of the copings using three kinds of materials： gold alloy, cp titanium and Ni-Cr alloy, so as to determine whether the fit changes was influenced with the veneer and their clinical significance. Methods：24 maxillary incisor acrylic resin PFM abutments fabricated by machine with the consolidated standard were divided into three groups, each abutment was waxed-up, invested, and casted with three kinds of materials ： gold alloy, cp titanium and Ni-Cr alloy. For all groups, the copings were repositioned on their respective abutments, the marginal fit values of four points of each coping were measured. Furthermore, after three groups of copings were veneered with recommended porcelain, marginal fit values of same point of each abutment were remeasured. SAS software was used to carry out statistical analysis. Results：One way analysis of variance of marginal fit values revealed significant differences between before and after veneering in three groups, and the marginal fit value enhanced after veneered. Among three groups, cp titanium group had a significant difference when compared with other two groups （ P 〈 0.05 ）. Conclusion ： In cp titanium group, the veneer has the smallest influence on the margin fit. All the marginal fit of three groups after veneered in present study has a clinically accepted values.

关 键 词：饰瓷 边缘适合性 边缘间隙 金合金 纯钛 镍铬合金 

分 类 号：R783[医药卫生—口腔医学]