CIE_(1976) L~*a~*b~* color system and a digital camera and computer were selected to measure and compare characteristic of VITA shade guide and three types of metal ceramic restorations and those of repeated firings.

• 本实验应用CIE1976L~*a~*b~*颜色系统，采用高像素数码摄影及计算机处理技术，对三种金瓷修复体颜色进行测试，分析其颜色变化规律，并研究烧结次数对三种金瓷修复体的颜色影响，为临床上金瓷修复体准确比色提供参考。