Open Access, Peer-reviewed
eISSN 2234-7666
    J Korean Acad Conserv Dent. 2009 May;34(3):199-207. Korean.
    Published online May 31, 2009.
    https://doi.org/10.5395/JKACD.2009.34.3.199
    Copyright © 2009 The Korean Academy of Conservative Dentistry
    Original Article

    Color difference of the dental composites measured by different color measuring instruments

    Su-Jung Park, Eun-Young Noh, Hyun-Gu Cho, Yun-Chan Hwang, Won-Mann Oh and In-Nam Hwang
      • Department of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University, Korea.
    • Corresponding author: In-Nam Hwang. Department of Conservative Dentistry, Chonnam National University School of Dentistry, Yongbong-ro 77, Buk-gu, Gwangju, 500-757, Korea. Tel. 82-62-530-5819, Fax. 82-62-530-5629, Email: hinso@jnu.ac.kr
    Received March 03, 2009; Revised March 26, 2009; Accepted April 23, 2009.

    This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

    Abstract

    The objective of this study was to evaluate the effect of color measuring instrument by measuring the color of dental composite resins.

    Nine shade light cured composite resin disks were prepared (diameter : 15 mm, thickness : 4 mm). CIE L*a*b* color scale of each disk was measured with 3 different types of spectrophotometer [MiniScan XE plus (Model 4000S, Hunter Lab, USA), CM-3500d (Minolta, Japan) and Specbos 2100 Miniature VIS Reflection spectrometer (Serial No: 319416, JETI Technishe VIS Instrumentic GmbH, Germany)]. Miniscan XE Plus and CM-3500d using identical measuring geometry with different size of viewing aperture. But Specbos 2100 using different measuring geometry.

    Within the limitation of this study, there were color difference (ΔE*) from 2.4 to 7.8 between Miniscan XE Plus and CM-3500d, but L*, a*, b* values showed the high correlation. However, there were great color difference (ΔE*) in the extent of about 20 between instruments with the different measuring geometry.

    Therefore, color scale measured by color measuring instrument should be used as a relative value rather than an absolute value in the field of dentistry.

    Keywords
    tooth color; resin color; colorimeter; spectrophotometer; color difference

    Figures

    Figure 1
    Diagram of the Duplex-Fiber bundle.

    Figure 2
    L* value change of the Z-250 according to the measuring instrument and condition.Miniscan: MiniScan XE Plus

    CD: Minolta CD-3500d

    spec-O/D: Specbos 2100 with original measuring tip under dark.

    spec-O/L: Specbos 2100 with original measuring tip under light.

    spec-H/L: Specbos 2100 with handmade measuring tip under light.

    Figure 3
    a* value change of the Z-250 according to the measuring instrument and condition.

    Figure 4
    b* value change of the Z-250 according to the measuring instrument and condition.

    Tables

    Table 1
    Products, shade, and manufacturers of tested composite resins

    Table 2
    CIE L*a*b* values of Filtek Z-250 measured by MiniScan XE Plus and Minolta CM 3500d

    Table 3
    CIE L*a*b* values of Filtek Z-250 measured by Specbos 2100 according to the used tip and measured condition

    Table 4
    Color difference(ΔE*) among different color measuring instruments in the Z-250

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    MeSH Terms
    Dentistry
    Light
    Pyridines
    Thiazoles
    Metrics
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