Open Access, Peer-reviewed, Quarterly
pISSN 0301-2875
eISSN 2005-3789
    J Korean Acad Prosthodont. 2012 Oct;50(4):299-304. Korean.
    Published online Oct 30, 2012.
    https://doi.org/10.4047/jkap.2012.50.4.299
    Copyright © 2012 The Korean Academy of Prosthodontics
    Original Article

    Evaluation of color matching ability according to the color temperature and the experience of practitioner

    Ji-Hyun Kim, DDS, MS,1 Sun-Jai Kim, DDS, PhD,1 Keun-Woo Lee, PhD,1 June-Sung Shim, DDS, PhD,1 and Joonho Yoon, DDS, PhD1,2
      • 1Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Korea.
      • 2Division of Prosthodontics, Eastman Institute for Oral Health, University of Rochester, Rochester, New York, USA.
    • Corresponding Author: Joonho Yoon. Division of Prosthodontics, Eastman Institute for Oral Health, University of Rochester, 601 Elmwood Ave, Rochester, NY 14642, USA. +1 585 275 5042: Email: joonho_yoon@urmc.rochester.edu
    Received October 05, 2012; Revised October 12, 2012; Accepted October 13, 2012.

    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

    Purpose

    The aim of this study is to investigate the effect of different experience level and different light source on shade selection ability comparing prosthodontist group and dental student group under 4,000 K and 5,500 K light.

    Materials and methods

    After color difference of Vitapan 3D-master shade guides was measured, 3 sets of 5 shade tabs were selected with similar value but have different chroma (set a, b, c). Also 3 sets of 5 shade tabs were selected with similar chroma but have different values (set d, e, f). Under 4,000 K and 5,500 K light sources, ten prosthodontists and ten dental students were allowed to match in one set of 5 tabs the same shade tab with the tab which was originally selected in the other set of 5 tabs. Color differences of original tab and matched tab were measured by spectrophotometer and the shade selection ability was evaluated with those data. Evaluation of color difference value was performed in regard to different light conditions and different level of experience, followed by t-test with 95% confidence interval.

    Results

    Color difference values under 4,000 K and 5,500 K light source were 1.62 ± 2.0, and 1.33 ± 1.7 respectively. In addition, color difference values of prosthodontist group and dental student group were 1.34 ± 1.7, and 1.61 ± 2.0 respectively. Difference of shade selection ability was not found under either different light sources (P=.398), or different experience level (P=.221).

    Conclusion

    Level of experience did not affect on the shade selection ability when prosthodontists and dental students matched the shades with the same shade tab under the same light source.

    Keywords
    Dental prosthesis coloring; Spectrophotometry; Shademate; Dental porcelain

    Figures

    Fig. 1
    Mean color difference (ΔE) value of prosthodontist group and student group under 4,000 K light source. Vertical axis means color difference value; horizontal axis reveals set of selected shade tabs (a, b, c: sets of selected shade tabs with similar value but have different chroma; d, e, f: sets selected shade tabs with similar chroma but have different value).

    Fig. 2
    Mean color difference (ΔE) value of prosthodontist group and student group under 5,500 K light source. Vertical axis means color difference value; horizontal axis reveals set of selected shade tabs (a, b, c: sets of selected shade tabs with similar value but have different chroma; d, e, f: sets selected shade tabs with similar chroma but have different value).

    Tables

    Table 1
    Chroma (C*ab) variable sets

    Table 2
    Lightness (L*) variable sets

    Table 3
    Analysis of t-test between the different light sources and between the different levels of experiences of participants

    Table 4
    Analysis of repeated-measures ANOVA showing impact and interactions of variables (*Significant difference α=0.05)

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    MeSH Terms
    Ceramics
    Dental Porcelain
    Humans
    Light
    Prosthesis Coloring
    Spectrophotometry
    Students, Dental
    Metrics
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