Difference in color and color parameters between dental porcelain and porcelain-repairing resin composite

✍ Scribed by Sung-Hee Kim; Yong-Keun Lee; Bum-Soon Lim; Sang-Hoon Rhee; Hyeong-Cheol Yang

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 101 KB
• Volume: 76B
• Category: Article
• ISSN: 1552-4973
• DOI: 10.1002/jbm.b.30344

✦ Synopsis

Abstract

The objective of this study was to measure the differences in color and color parameters between dental porcelain and porcelain‐repairing resin composites. The colors of three shades (A2, A3, A3.5) of one brand of dental porcelain, three original shades (A2, A3, A3.5), and three combinations (A2/A3, A3/3.5, A2/A3.5) of three brands of porcelain‐repairing resin composites (ABT, FSP, TCR) were measured. The specimens were 2 mm thick, and 1 mm of each shade was layered to make combined shades. Differences in color (Δ__E__), lightness (Δ__L__*), chroma (Δ__C__), and hue (Δ__H__^*^) between porcelain and resin composite were calculated. Color difference was calculated as Δ__E__ = (Δ__L__*^2^ + Δ__a__*^2^ + Δ__b__*^2^)^1/2^, chroma difference was calculated as Δ__C__ = (Δ__a__*^2^ + Δ__b__*^2^)^1/2^, and hue difference was calculated as Δ__H__ = (Δ__E__ − Δ__L__*^2^ − Δ__C__)^1/2^. The influence of porcelain shade, brand of resin composites, and shade of resin composites were analyzed by three‐way analyses of variance, and the differential influence of color parameters on color difference was analyzed with multiple regression analysis (α = 0.05). Differences in color and color parameters were influenced by the porcelain shade, brand and shade of resin composites. The Δ__E__ value was in the range of 2.2–16.9. The Δ__E__ value was correlated with Δ__C__ (standardized correlation coefficient, β = − 0.85), Δ__L__* (β = − 0.52), and Δ__H__ (β = 0.08). Between the same shade designated pairs of porcelain and repairing composite, color difference was perceptible. Therefore, studies to improve the color matching between porcelain and repairing resin are recommended. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2006