Evaluating the accuracy of tooth color measurement by combining the Munsell color system and dental colorimeter

Kaohsiung Journal of Medical Sciences

Po-Sung Fu¹  Wen-Cheng Chen²  Jiun-Yao Chang³  Jeng-Huey Chen³  Chun-Cheng Hung³  Ta-Ko Huang³  Jen-Chyan Wang³ 

[1] Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan;Department of Fiber and Composite Materials, College of Engineering, Feng Chia University, Taichung 40724, Taiwan;School of Dentistry, Kaohsiung Medical University, 807 Kaohsiung, Taiwan;

关键词: CIELAB;    Color matching;    Munsell color system;    Shade guide;   

DOI  :  10.1016/j.kjms.2012.04.006

来源: DOAJ

【 摘 要 】

As we pay increasing attention to dental aesthetics, tooth color matching has become an important part of daily dental practice. This aim of this study was to develop a method to enhance the accuracy of a tooth color matching machine. The Munsell color tabs in the range of natural human teeth were measured using a tooth color measuring machine (ShadeEye NCC). The machine's accuracy was analyzed using an analysis of variance test and a Tukey post-hoc test. When matching the Munsell color tabs with the ShadeEye NCC colorimeter, settings of Chroma greater than 6 and Value less than 4 showed unacceptable clinical results. When the CIELAB mode was used, the a* value (which represents the red–green axis in the Commission Internationale de l'Eclairage color space) made no significant difference (p=0.84), the L* value (which represents the lightness) resulted in a negative correlation, and the b* value (which represents the yellow–blue axis) resulted in a positive correlation with ΔE. When the Munsell color tabs and the Vitapan were measured in the same mode and compared, the inaccuracies showed that the Vitapan was not a proper tool for evaluating the stability and accuracy of ShadeEye NCC. By knowing the limitations of the machine, we evaluated the data using the Munsell color tabs; shade beyond the acceptable range should be reevaluated using a visual shade matching method, or if measured by another machine, this shade range should be covered to obtain more accurate results.

【 授权许可】

Unknown