金瓷修复体与VITA成品比色板色度差

Color Comparision of VITA Shade Guide and Metal Ceramic Restoration

目的：掌握ＶＩＴＡ成品比色板及金瓷修复体的色度规律，合理、客观使用ＶＩＴＡ成品比色板。方法：随机抽取由同一位技师采用ＹＫＨ－１Ｎｉ－Ｃｒ烤瓷合金、ＶＩＴＡＶＭＫ６８系列瓷粉制作的９２件前牙金瓷修复体，对其颜色及所选ＶＩＴＡ成品比色板比色片颜色用美能达ＣＲ－１００型色度计，ＣＩＥ１９７６Ｌ＊ａ＊ｂ＊系统进行测试。结果：金瓷修复体的明度值均高于所选比色片的明度值。二者色相一致，彩度值不相同，存在肉眼能区分的颜色差异。结论：使用ＶＩＴＡ成品比色板指导临床配色、选色时，应选择较同名牙或相邻牙明亮度低、色彩偏淡的比色片作为指导制作金瓷修复体的色标。

Objective: To understand color distribution of Vita shade guide and metal ceramic restoration and make Vita shade guide more reasonable in clinical applying. Methods: The international standard CIE 1976 L *a *b * color system and Minolta CR 100 spectrocolorimeter were selected to measure and compare the characteristics of the shade guide and metal ceramic restoration. Results: Color differences were noted between the shade guide and ceramic restorations. The value of metal ceramic restoration was brighter than that of VITA shade guide tab. There was different chroma between metal ceramic restoration and Vita shade guide. Metal ceramic restorations were yellower and redder. But no saturation differences were found between ceramic restorations and D2, D3 tabs. Conclusion: During clinical color matching of metal ceramic porcelains, it is suggested that a VITA shape guide tab with lower brightness and paler color than that of adjacent teeth should be selected.