Kurtulmus-Yilmaz Sevcan, Ulusoy Mutahhar
Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin10, Turkey.
J Adv Prosthodont. 2014 Oct;6(5):415-22. doi: 10.4047/jap.2014.6.5.415. Epub 2014 Oct 21.
The purpose of this study was to evaluate and compare the translucency of shaded zirconia all-ceramic systems.
Translucency of 3 different zirconia all-ceramic systems colored by different techniques was compared with a lithium disilicate glass-ceramic (IPS e.max Press). Square-shaped specimens with 0.5 mm thickness were fabricated from In-Ceram YZ, ICE Zirkon and Katana systems in A1, A2 and A3.5 shades according to Vitapan Classical shade tab (n=11). Specimens were then veneered and glazed with corresponding veneer ceramic recommended by each zirconia system manufacturer and the total thickness was set to 1.5 mm. Translucency measurements were performed with VITA Easyshade Compact spectrophotometer after each stage and translucency parameter was calculated. Data were statistically analyzed with repeated measures ANOVA and Tukey multiple comparison test.
The control group was significantly more translucent than the zirconia systems (P<.05). ICE Zirkon cores showed the least translucency; neither In-Ceram YZ nor Katana systems were superior to each other in terms of translucency. Translucency of all specimens was decreased after veneering, and the translucency rankings were changed.
Coloring technique did not have a significant effect on translucency of zirconia cores. Although zirconia systems were less translucent than lithium disilicate glass ceramic, they had partial translucency and there were translucency differences among the zirconia systems. Chroma affected the translucency of precolored zirconia cores.
本研究旨在评估和比较遮色氧化锆全瓷系统的半透明度。
将3种采用不同技术着色的不同氧化锆全瓷系统的半透明度与二硅酸锂玻璃陶瓷(IPS e.max Press)进行比较。根据维他经典比色板,采用In-Ceram YZ、ICE Zirkon和Katana系统制作厚度为0.5毫米的方形试件,颜色为A1、A2和A3.5(n = 11)。然后用各氧化锆系统制造商推荐的相应饰面陶瓷对试件进行贴面和上釉处理,总厚度设定为1.5毫米。在每个阶段后,使用VITA Easyshade Compact分光光度计进行半透明度测量,并计算半透明度参数。数据采用重复测量方差分析和Tukey多重比较检验进行统计学分析。
对照组的半透明度明显高于氧化锆系统(P <.05)。ICE Zirkon核的半透明度最低;In-Ceram YZ和Katana系统在半透明度方面均不优于对方。贴面后所有试件的半透明度均降低,且半透明度排名发生变化。
着色技术对氧化锆核的半透明度没有显著影响。虽然氧化锆系统的半透明度低于二硅酸锂玻璃陶瓷,但它们具有部分半透明度,且不同氧化锆系统之间存在半透明度差异。色度影响预着色氧化锆核的半透明度。