Development of new dental Ceramic corermy natural tooth Color

自然牙齿颜色受种族背景、年龄、性别和漂白经历的影响，并指示巨大的颜色空间。本研究的目的是开发一种新的客观的颜色秩序，需要在陶瓷冠上再现自然牙齿的颜色。首先，我们测量了500名受试者的上中切牙，包括四个种族背景：白人，西班牙裔，非洲裔美国人和亚洲人，使用分光光度计，并定义了自然牙齿的颜色空间。其次，我们通过视觉评价和计算机评价（CCS：计算机颜色搜索）两种方法从90件常规比色板中澄清了必要的比色标签（CCS标签）。然后，指出比色板与天然牙的颜色差异。CCM标签是为牙齿的颜色，这是不包括由传统的比色板。对由36种CCS标签和16种CCM标签组成的52种色调标签计算作为代表颜色的单一指标的颜色深度，并根据颜色深度值对这些色调标签进行编号。该色序由52种颜色表组成，覆盖了天然牙的颜色，为客观评价天然牙的颜色提供了新的色序。计算机寻色法是一种新的牙齿颜色再现方法。

Natural tooth color is affected by the ethnic background, age, gender and bleaching experience and indicates a huge color space. The purpose of this study to develop the new objective color order that is required for reproducing natural tooth color on the ceramic crown.First of all, we measured upper central incisors of 500 subjects including four ethnic backgrounds ; Caucasian, Hispanic, Afro-American and Asian using a spectrophotometer, and defined the color space of natural tooth. Second, we clarified the necessary shade tabs (CCS tab) out of 90 pieces of the conventional shade guides by two methods of visual evaluation and computerized evaluation (CCS : Computer Color Searching). Then, the color discrepancy between shade guides and natural tooth was indicated. CCM tabs were made for the tooth color that was not covered by the conventional shade guides. Color depth that is the single index representing the color was calculated for 52 kinds of shade tabs consisting of 36 kinds of CCS tabs and 16 kinds of CCM tabs, and these shade tabs were numbered according to the value of color depth. This color order consisting of 52 kinds of shade tabs covering natural tooth color is the newly developed color order that makes it possible to evaluate the natural tooth color objectively.Base on the results of this study, it could be said that methodology combined with three procedures of the tooth color measurement, CCS ; Computer Color Searching and CCM ; Computer Color Searching, is the new color reproducing methodology for the natural tooth color.