厚度对烤瓷贴面颜色的影响

目的:考察加入不同厚度的饰面瓷在0.2mm氧化铝上双层烤瓷贴面颜色的变化。方法:10个氧化铝圆片随机分为2组,每组5个分别堆加0.4mm和0.6mm的比色B4饰面瓷,底质上覆盖没有饰面的圆片和2种不同厚度饰面瓷的圆片后,测量颜色参数L~*a~*b~*,并计算色差(ΔE)。结果:第1组和第2组在底质上覆盖氧化铝圆片上堆加饰面瓷前后,颜色参数有显著性差异,P分别为0.0002和0.0075;2组之间已存在差异,P为0.0001。结论:当烤瓷贴面厚度增加时,其遮色能力增加,且颜色偏蓝。

Effect of the Thickness on Color of Porcelain Laminate Veneer

Objective : To evaluate the color change of the two-layer porcelain laminate veneer after adding veneering porcelain of different thickness to the 0. 2 mm thick aluminum oxide. Methods : Ten aluminum oxide disks were randomized into 2 groups. Each of five disks was veneered with Vita Lumin Shade 54 porcelain of thickness 0/0.4 mm and 0. 6 mm respectively. The L'a'b* color notations of the substrate covered with nan-veneered disks and 2 thickness porcelain veneered disks were measured separately and the color differences (AE) were calculated. Results ?Statistically significant differences in color coordinates of dark substrates were recorded after the substrate was covered by an aluminum oxide disk and also after the addition of veneering porcelain to the aluminum oxide disks in group 1 (P=0. 000 2) and group 2(P=0. 007 5) and between 2 groups (P=0. 000 1). Conclusion -The ability of masking underlying discoloration was increased and shifted to gray when the thickness of veneering porcelain increased.