Methods In the same condition,CIE1976L*a*b* color system,a digital camera,computer and a standard light source were selected to measure and compare the characteristics of A2 shade slice in the shade guide and three types of metal ceramic restorations.

• 方法应用CIE1976L*a*b*颜色系统,采用高像素数码摄影及计算机处理技术,在标准光源及相同条件下,采集了24件3种金瓷修复体与A2比色片的样本图片,测量、分析其色度值。