体瓷厚度与烧结次数对Cercon氧化锆全瓷颜色的影响  

Effect of Dentin Ceramic Thickness and Number of Firings on the Color of Cercon Ceramic System

作　　者：陈觉清 段昌华 邓向东 张佩芬 

机构地区：[1]佛山市禅城区向阳医院口腔科,广东佛山528000

出　　处：《口腔医学研究》2014年第3期223-225,共3页Journal of Oral Science Research

摘　　要：目的:探讨不同体瓷厚度和不同烧结次数对Cercon氧化锆全瓷颜色的影响。方法:用氧化锆底瓷材料制作直径为12mm、厚度为0.8mm的圆盘状试件15个,表面涂塑体瓷。根据体瓷厚度的不同分为3组:0.5mm组、1.0mm组和1.5mm组,每组5个。严格按厂家规定的饰面瓷烧结程序对氧化锆试件反复烧结,分别于烧结1次、3次、5次、7次后使用Easyshade电脑比色仪对氧化锆试件的色度学参数进行测量,记录所得L*、a*、b*值。并计算色差△E:△E=[(△L*)2+(△a*)2+(△b*)2]1/2。结果:随着体瓷厚度的增加,L*值显著下降(P<0.05),a*和b*值显著上升(P<0.05);随着烧结次数的增加,0.5mm厚度组和1.0厚度组L*值明显增大(P<0.05),而1.5mm厚度组未见明显差异;3组的a*值均明显减小(P<0.05),颜色向绿色偏移;1.0厚度组和1.5mm厚度组b*值明显增大(P<0.05),颜色向黄色偏移,而0.5mm厚度组b*值未见明显差异。不同体瓷厚度的△E值均>3,而同一厚度下不同烧结次数后的两两比较,△E值均<3。结论:Cercon氧化锆全瓷体瓷厚度增加后明度下降,色调趋向变红、变黄;随着烧结次数增加,明度增加,颜色向绿色、黄色偏移,但肉眼难以察觉。Objective： To evaluate the effects of various dentin ceramic thicknesses and repeated firings on the color of zirconium oxide. Methods： 15 disc--shaped cores, 12 mm in diameter with a 0.8 mm thickness were fabricated from zirconium oxide and divided into three groups according to veneering with dentin ceramic thicknesses： as 0.5, 1, or 1.5 mm. Repeated firings （1, 3, 5, 7） were performed, and the data was measured by a Easyshade spectro- photometer. Results： L^＊ a^＊ b^＊ values of the Cercon systems were affected by the number of firings （P〈0.05） and ceramic thickness （P〈0. 05）. Conclusion.. The number of firings and dentin ceramic thickness have a definite effect on the final color of Cercon system.

关 键 词：颜色 氧化锆 厚度 

分 类 号：R783.2[医药卫生—口腔医学]