Color stability of nanocrystallite-treated and silicate-treated fillers of calcium phosphate composite resin: an in vitro study

The Journal of Prosthetic Dentistry
Wen Cheng Chen, Hui Yu Wu

Abstract

Some composite resins fail esthetically because the color differences to adjacent tooth structure are more than the limits of color tolerance (values are higher than 3.3 ΔE units). The purpose of this study was to assess the effect on color stability of surface-modified dicalcium phosphate anhydrous particles treated with nanocrystallites and silane coupling agents used as fillers for dental composite resin. Specimens were divided into 4 groups of fillers on unmodified (without modification) and on modified surfaces (silanization, nanocrystallites, and nanocrystallites with silica). These groups served as reinforcements and had 2 mass ratios of fillers (filler+resin) at 30% and 50%. The color differences were measured from day 1 after thermocycling procedures and for different specimen-treated procedures (drying, immersion, and thermocycling) at 1 to 16 days after 24 hours of immersion (n=5). ANOVA test was used to analyze the differences. The Student t test was used to evaluate the significant group comparisons, and a 3-way ANOVA was used to determine differences and interactions with the filler amount data (α=.05). Specimens with lower amounts of silica-treated fillers exhibited more variations in color than specimens with la...Continue Reading

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Citations

Jul 23, 2014·Journal of the Mechanical Behavior of Biomedical Materials·Wen-Cheng ChenChi-Jen Shih
Dec 29, 2020·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Natalia Almeida BastosGrace Mendonca De Souza

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