Comparative Evaluation of the Color Stability of Three Light-Cured Composite Resins after Exposure to Common Beverages
DOI:
https://doi.org/10.24086/cuesj.v10n1y2026.pp100-105Keywords:
Color stability, spectrophotometry, composite discoloration, Clearfil AP-X esthetics, ELS Xetra, neo spectraAbstract
The objective of this study was to use the CIE L*a*b* color system and spectrophotometric analysis to assess the color stability of three light-polymerizing resin composites: Clearfil AP-X Esthetics (Kuraray), ELS Xetra (Saremco), and Neo Spectra™ ST (Dentsply Sirona) following exposure to common beverages (coffee, tea, and water). Ninety specimens (n = 30/composite) were prepared and cured according to the manufacturers’ instructions. Each composite group was divided into three subgroups (n = 10) and immersed in coffee, tea, or distilled water. Color measurements were taken at baseline, 10 days, and 20 days using the VITA Easyshade® spectrophotometer. The ΔE (color difference) values were calculated, and results were statistically analyzed using the Wilcoxon signed-rank test, one-way Analysis of Variance, and Tukey’s post hoc tests. ΔE values were converted to National Bureau of Standards (NBS) units to assess clinical perceptibility. The result shows that coffee was the most effective staining agent, with all composites showing substantial color change over time (P < 0.05). Clearfil had the highest ΔE values (5.70 during 20 days in coffee), followed by ELS Xetra (6.20), while Neo Spectra had the least discoloration (5.10). Tea generated substantial discoloration, whereas distilled water produced negligible changes. NBS conversion showed that coffee immersion caused “very much perceptible” alterations in all composites. The color stability of composite restorations is greatly impacted by the staining potential of liquids, especially coffee. Clearfil and ELS Xetra were more prone to discoloration, whilst Neo Spectra showed better resilience. These results highlight how crucial dietary advice and composite selection are to attaining long-term esthetic results.
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Copyright (c) 2026 Maryam F. Ibrahim, Sawen T. Taha, Bahoz H. Majeed, Hataw N. Mohammed , Perla E. Yaghoob
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