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Comparison of Color of Resin Composites of White and Translucent Shades with Two Shade Guides
Author(s) -
LEE YONGKEUN,
LIM BUMSOON,
KIM CHEOLWE,
POWERS JOHN M.
Publication year - 2001
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/j.1708-8240.2001.tb00261.x
Subject(s) - color difference , materials science , composite material , color analysis , resin composite , composite number , optics , mathematics , physics , computer science , artificial intelligence , enhanced data rates for gsm evolution
ABSTRACT Purpose: The purpose of this study was to compare the color of resin composites of white, translucent, and conventional shades with shade guides, based on the analysis of the color distribution of shade guides. The influence of color measuring mode, specular component included (SCI) or excluded (SCE), was also determined. Materials and Methods: The labial portions of shade guide tabs (Vita and Chromascop) were polished flat with up to 2400‐grit SiC paper. Color coordinates were measured according to CIE L*a*b* color scale on a reflection spectrophotometer with both the SCE and SCI modes. The color coordinates of white, translucent, and conventional shades of two brands of resin composites were measured and compared with those of the shade guides. Results: There was no logical order in the color distribution of the two shade guides. The color of white and translucent shades of resin composites was located on the low CIE a* and CIE b* value area. The CIE L*, a*, b* values of resin composite with the same color designations were different, depending on the brand of material. The color difference (AE*) of shade guides by the measuring mode (SCE vs. SCI) was between 3.2 and 6.5. CLINICAL SIGNIFICANCE A new systematic shade guide including the new white or translucent shades of resin composites should be made, based on the logical distribution of colors. The color difference caused by the color measuring mode should be considered in color measurement of esthetic restorative materials and in the design of the shade guide. Also, regardless of the brand of materials, there should be unification of shades for consistent clinical result.