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Original Article Proposal of new dental color-space for aesthetic dental materials
Yun-Jeong Oh, Su-Jung Park, Dong-Jun Kim, Hyun-Gu Cho, Yun-Chan Hwang, Won-Mann Oh, In-Nam Hwang
Journal of Korean Academy of Conservative Dentistry 2007;32(1):19-27.
DOI: https://doi.org/10.5395/JKACD.2007.32.1.019
Published online: January 31, 2007

Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University, Korea.

Corresponding Author: In-Nam Hwang. Department of Conservative Dentistry, School of Dentistry, Chonnam National University, 5 Hak-dong, Dong-gu, Gwangju, 501-757, Korea. Tel: 82-62-220-4443, Fax: 82-62-225-8387, hinso@jnu.ac.kr
• Received: October 4, 2006   • Revised: December 11, 2006   • Accepted: December 18, 2006

Copyright © 2007 Korean Academy of Conservative Dentistry

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  • 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° 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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Figure 1
Schematic diagram of the CIE L*a*b* color system.
jkacd-32-19-g001.jpg
Figure 2
Diagram of the CNU-Cons Dental Color system.
jkacd-32-19-g002.jpg
Figure 3
L* and C* value of the tested materials.
jkacd-32-19-g003.jpg
Figure 4
a* and b* value of the tested materials.
jkacd-32-19-g004.jpg
Figure 5
Histogram of the L* value.
jkacd-32-19-g005.jpg
Figure 6
Histogram of the a* value.
jkacd-32-19-g006.jpg
Figure 7
Histogram of the b* value.
jkacd-32-19-g007.jpg
Table 1
Used materials in this study
jkacd-32-19-i001.jpg
Table 2
Descriptive statistics of the measured L*a*b* values
jkacd-32-19-i002.jpg
Table 3
L*a*b* range of the T### code in CNU Cons Dental Color Chart
jkacd-32-19-i003.jpg
Table 4
Application of new color code of CNU Cons Dental Color Chart to two light cured composites (ChamFil & Z-100)
jkacd-32-19-i004.jpg

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    • Difference in color and translucency according to dental zirconia A3 colorant
      Joo-Hee Lee, Jin-Young Park
      Journal of Korean Acedemy of Dental Technology.2022; 44(4): 118.     CrossRef

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      Proposal of new dental color-space for aesthetic dental materials
      J Korean Acad Conserv Dent. 2007;32(1):19-27.   Published online January 31, 2007
      DOI: https://doi.org/10.5395/JKACD.2007.32.1.019
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    Proposal of new dental color-space for aesthetic dental materials
    Image Image Image Image Image Image Image
    Figure 1 Schematic diagram of the CIE L*a*b* color system.
    Figure 2 Diagram of the CNU-Cons Dental Color system.
    Figure 3 L* and C* value of the tested materials.
    Figure 4 a* and b* value of the tested materials.
    Figure 5 Histogram of the L* value.
    Figure 6 Histogram of the a* value.
    Figure 7 Histogram of the b* value.

    Figure 1

    Figure 2

    Figure 3

    Figure 4

    Figure 5

    Figure 6

    Figure 7

    Proposal of new dental color-space for aesthetic dental materials

    Used materials in this study

    Descriptive statistics of the measured L*a*b* values

    L*a*b* range of the T### code in CNU Cons Dental Color Chart

    Application of new color code of CNU Cons Dental Color Chart to two light cured composites (ChamFil & Z-100)
    Table 1 Used materials in this study

    Table 2 Descriptive statistics of the measured L*a*b* values

    Table 3 L*a*b* range of the T### code in CNU Cons Dental Color Chart

    Table 4 Application of new color code of CNU Cons Dental Color Chart to two light cured composites (ChamFil & Z-100)

    Table 1

    Table 2

    Table 3

    Table 4

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