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目的 分析两种烤瓷比色板的颜色分布特点 ,并与中国人牙齿颜色分布范围比较。方法 采用CIE1931XYZ及CIE1976LL a b 颜色参数系统 ,应用人体牙齿颜色测量分光光度计系统对Vita、Ivoclar烤瓷比色板各色片进行测量分析 ,与中国人牙齿颜色范围进行比较。结果 ①两种烤瓷比色板颜色分布范围未能覆盖中国人正常牙颜色分布范围 ;②两种烤瓷板呈现不同的表现 :Ivoclar比色板明度较大 ,且偏红 ,蓝色不足 ,Vita比色板则明度不足 ,红色、黄色色片不足 ,③两种烤瓷比色板均存在颜色分布不合理现象。结论 两种比色板颜色范围较窄 ,不完全符合中国人牙齿颜色范围
Objective To analyze the color distribution of two kinds of porcelain color plates and to compare with the color distribution of Chinese teeth. Methods The CIE1931XYZ and CIE1976LL a b color parameters system were used to measure and analyze the color patches of Vita and Ivoclar ceramic color plates with the human dental color measurement spectrophotometer system. Results ① The color distribution of the two kinds of porcelain colorimetric plates failed to cover the distribution range of normal tooth color in China. ② The two kinds of ceramic porcelain showed different appearances: the Ivoclar colorimetric plate was more bright, reddish and blue, Vita color palette is less than the brightness, red, yellow lack of color film, ③ two kinds of porcelain color plates have color distribution unreasonable phenomenon. Conclusion The color range of the two color palettes is narrow and does not fully meet the color range of Chinese teeth