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http://dx.doi.org/10.5395/JKACD.2007.32.1.019

PROPOSAL OF NEW DENIAL COLOR-SPACE FOR AESTHETIC DENIAL MATERIALS  

Oh, Yun-Jeong (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Park, Su-Jung (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Kim, Dong-Jun (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Cho, Hyun-Gu (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Hwang, Yun-Chan (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Oh, Won-Mann (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Hwang, In-Nam (Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Publication Information
Restorative Dentistry and Endodontics / v.32, no.1, 2007 , pp. 19-27 More about this Journal
Abstract
The purpose of this study is to develope new dental color-space system. Twelve kinds of dental composites and one kind of dental porcelain were used in this study. Disk samples (15 mm in diameter, 4 mm in thickness) of used materials were made and sample's CIE $L^*a^*b^*$ value was measured by Spectrocolorimeter (MiniScan XE plus, Model 4000S, diffuse/$8^{\circ}$ viewing mode, 14.3 mm Port diameters, Hunter Lab USA) The range of measured color distribution was analyzed. All the data were applied in the form of T### which is expression unit in CNU Cons Dental Color Chart. The value of $L^*$ lies between 80.40 and 52.70. The value of $a^*$ are between 10.60 and 3.60 and $b^*$ are between 28.40 and 2.21. The average value of $L^*$ is 67.40, and median value is 67.30. The value of $a^*$ are 2.89 and 2.91 respectively. And for the $b^*$, 14.30 and 13.90 were obtained. The data were converted to T### that is the unit count system in CNU-Cons Dental Color Chart. The value of $L^*$ is converted in the first digit of the numbering system. Each unit is 2.0 measured values. The second digit is the value of $a^*$ and is converted new number by 1.0 measured value. For the third digit $b^*$ is replaced and it is 2.0 measured unit apart. T555 was set to the value of $L^*$ ranging from 66.0 to 68.0, value of $a^*$ ranging from 3 to 4 and $b^*$ value ranging from 14 to 16.
Keywords
Tooth color; Color system; Dental color space; CIE $L^*a^*b^*$; Esthetic material; Dental color chart;
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