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Changes in color and translucency of porcelain‐repairing resin composites after thermocycling
Author(s) -
Choi MiSook,
Lee YongKeun,
Lim BumSoon,
Rhee SangHoon,
Yang HyeongCheol,
Lim YoungJun
Publication year - 2006
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30437
Subject(s) - materials science , standard illuminant , composite material , color difference , resin composite , dental porcelain , composite number , optics , computer science , physics , filter (signal processing) , computer vision , ceramic
The objective of this study was to determine the changes in color and translucency of dental porcelain‐repairing resin composites compared to dental porcelain after thermocycling. Color and spectral reflectance of three shades (A2, A3, and A3.5) of one brand of dental porcelain and three basic shades (A2, A3, and A3.5) and three combinations (A2/A3, A3/3.5, and A2/A3.5) of three brands of porcelain‐repairing resin composites (ABT, FSP, and TCR) were measured, before and after thermocycling for 3000 cycles, relative to the illuminant D65. The specimen was 2 mm in thickness, and 1 mm of each shade was layered to make combined shades. Changes in color (Δ E * ab ) and translucency parameter (ΔTP) were calculated. A general linear model by the material (porcelain or resin composite) and shade was used to compare differences (α = 0.05). The range of color changes was 0.68–1.67 in porcelain, 0.56–1.30 in ABT, 2.28–3.10 in FSP, and 0.36–1.15 in TCR. The range of ΔTP was 0.45–0.96 in porcelain, −0.48 to 0.94 in ABT, −1.31 to 0.82 in FSP, and −0.51 to 1.91 in TCR. After thermocycling, changes in color and TP were correlated with the shade of the material, but not with the material. The discrepancy in the changes of color and translucency after thermocycling between porcelain and porcelain‐repairing resin composites should be considered when selecting repairing materials. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2006