不同核饰瓷厚度对CAD/CAM玻璃陶瓷材料透明性的影响  

Influence of Thickness of Core and Veneer Ceramics on Transparency of CAD/CAM Glass Ceramics

作　　者：赵军[1] 樊洪[1] ZHAO Jun;FAN Hong(Department of Prosthodontics, Tianjin Stomatological Hospital, Tianjin 300041, China)

机构地区：[1]天津市口腔医院修复一科,天津300041

出　　处：《口腔医学研究》2020年第3期273-275,共3页Journal of Oral Science Research

摘　　要：目的:探讨不同核饰瓷厚度的CAD/CAM玻璃陶瓷的对比度(contrast ratio,CR)以及与A2色测色试件的色差ΔE。方法:将IPS e.max CAD瓷块和IPS Empress CAD瓷块加工成厚度分别为0.8、1.0、1.2 mm的方型核心瓷片,然后在核心瓷上烧结厚度分别为0.7、0.5、0.3 mm的相应饰瓷,最后上釉。共制作30片12×12 mm、总厚度为1.5 mm的瓷试件(n=5)。采用CM-3600A分光测色计测量试件的色度值,用来计算试件的对比度(contrast ratio,CR)和与A2色片的色差(ΔE)。结果:IPS e.max CAD组的CR值明显大于IPS Empress CAD组。IPS e.max CAD组的ΔE值小于IPS Empress CAD组。结论:不同核瓷厚度组合的IPS e.max CAD和IPS Empress CAD都能较好的模拟目标颜色;IPS Empress CAD的透明性要高于IPS e.max CAD。Objective:To explore the contrast ratio(CR)of different thickness of core and veneer of CAD/CAM glass ceramics and the color difference(ΔE)with A2 color test piece.Methods:The IPS e.max and IPS Empress CAD ceramic blocks were processed into square core porcelain with thickness of 0.8,1.0,and 1.2 mm,respectively.The core porcelain was sintered with 0.7,0.5,and 0.3 mm veneer porcelain,and finally glazed.A total of 30 porcelain specimens with 12×12 mm and 1.5 mm in the thickness were made(n=5).CM-3600A spectrophotometer was used to measure the color parameters of the specimens,which was used to calculate the CR of the specimens and theΔE with A2 color test piece.Results:The CR value of IPS e.max CAD group was significantly higher than that of IPS Empress CAD group.TheΔE value of IPS e.max CAD group was less than that of IPS Empress CAD group.Conclusion:IPS e.max CAD and IPS Empress CAD can better simulate the target color with different thickness of core and veneer.The transparency of IPS Empress CAD is higher than that of IPS e.max CAD.

关 键 词：玻璃陶瓷 透明性 厚度 对比度 

分 类 号：R78[医药卫生—口腔医学]