COLOR STABILITY OF A NANOFILL COMPOSITE: EFFECT OF DIFFERENT IMMERSION MEDIA |
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| Authors: | Silvia Terra Fontes María Raquel Fernández Claudia Modena de Moura S?nia Saeger Meireles |
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| Affiliation: | 1.DDS, MS, PhD student, Department of Operative Dentistry, Dental School, Federal University of Pelotas, Pelotas, RS, Brazil;2.DDS, Private Practice, Porto Alegre, RS, Brazil;3.DDS, MS, PhD, Adjunct Professor, Department of Operative Dentistry, Federal University of Paraíba, João Pessoa, PB, Brazil |
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| Abstract: | Objective:The aim of this in vitro study was to evaluate the color stability of a nanofill composite resin (Filtek Z350) in different immersion media.Materials and methods:Twelve resin-based composite specimens were prepared using a silicon cylindrical mold measuring ≅1mm of thickness and ≅ 10mm of diameter. Specimens were light-cured for 40 s from both sides using a LED Radii at 1400 mW/cm2 and were randomized into 4 groups (n= 3) according to immersion media: coffee, yerba mate, grape juice or water (control solution). A digital spectrophotometer was used to evaluate the color changes at baseline and at 1-week after immersion in each solution. Specimens were stored in the different staining media for 4 h/day during 1 week. The color differences (ΔE) were analyzed by paired t-test and one-way ANOVA with complementary Tukey test (p<0.05).Results:After 1-week of immersion, a perceptive color change for the group stored in the grape juice compared to baseline (p=0.008) was observed. Coffee and yerba mate did not show any color changes visible for the human eyes or significantly different from the control group (p>0.05)Conclusions:The findings of the present study suggest that the tested nanofill resin-based composite was susceptible to staining by substances present in the grape juice. |
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| Keywords: | Composite resins Nanoparticles Staining |
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