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目的:比较分析临床上金属烤瓷冠修复体与医生所选比色板色样间的颜色差异。方法:随机选取216例已完成的镍铬金属烤瓷冠,应用Shade-Eye NCC电脑比色仪测定该烤瓷冠及其对应的Vita比色板色样的色彩值与色度值,测量结果用孟塞尔(Munsell AM)颜色三属性(即色相、明度、饱和度)表色系统及CIE1976 L*a*b*表色系统表示。结果:烤瓷冠平均明度比所对应色样偏亮,平均红绿色品比对应色样偏红,平均黄兰色品比对应色样偏黄。烤瓷冠与所选色样间的色差平均为6.177,属于可识别范围。烤瓷冠平均彩度比对应色样偏浓,平均明度比对应色样偏亮,平均色相比对应色样偏红。结论:技工加工完成的烤瓷冠颜色与医生所选比色板色样间存在着显著性差异
OBJECTIVE: To compare and analyze the color differences between clinical metal porcelain crown prostheses and color palette samples selected by doctors. Methods: A total of 216 cases of Ni-Cr metallic porcelain crowns were randomly selected. The color and chroma values of the porcelain crowns and their corresponding Vita color plates were measured by Shade-Eye NCC computer colorimetry. Represented by the Munsell AM color three-attribute (Hue, Lightness, Saturation) color system and the CIE 1976 L * a * b * color system. Results: The mean brightness of porcelain crowns was lighter than that of the corresponding color samples. The average reddish - green color was more reddish than the corresponding color. The average color of yellowish blue was more yellow than the corresponding color. The average color difference between porcelain crowns and selected color samples is 6.177, which belongs to the identifiable range. The average colorimetric ratio of porcelain crowns is too thick, the average brightness ratio is lighter than the corresponding color samples, and the average color is redder than the corresponding color samples. Conclusion: There is a significant difference between the color of the porcelain crown finished by the technician and the color palette selected by the doctor