| Autor: |
ARAUJO, ERIKA MICHELE DOS SANTOS, SILVA, BEATRIZ TOGORO FERREIRA DA, SIRIANI, LUCIANA KFOURI, LAGO, ANDREA DIAS NEVES, SIMIONATO, MARIA REGINA LORENZETTI, MATOS, ADRIANA BONA |
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| Zdroj: |
American Journal of Dentistry; Aug2019, Vol. 32 Issue 4, p159-164, 6p |
| Abstrakt: |
Purpose: To compare the effect of thermal cycling and erosive challenge on color change, surface roughness, surface loss and biofilm deposition of three resin-based composites. Methods: Three resin-based composites that reproduce the color of gingival tissues [two nanohybrid composites (A and B) and a giomer (C)] were tested before and after distinct challenges [thermal cycling (TC) and erosive challenge (EC)] in regard to its color stability, surface roughness, surface loss and biofilm deposition. Surface roughness and surface loss specimens (n=10) were measured with an optical profilometer and, color stability (n=10) was measured with a spectrophotometer. Biofilm deposition (n=5) was measured after 3 and 24 hours by safranin staining. Results: Two-way ANOVA test was performed to analyze color change, roughness and surface loss. A significant color change was detected for resin-based composites (P< 0.05) and its interaction with tested challenges (P< 0.05). The highest color variation was observed on the giomer after erosive challenge. Surface loss was not different between tested groups (P= 0.708). The roughness was significantly higher in specimens submitted to thermal cycling (P> 0.05). For biofilm quantification, after 3 and 24 hours, ANOVA (3-way) detected significance for the interaction of challenges and resin-based composites (P< 0.05 and P< 0.05, respectively). All resin-based composites presented color changes after challenges; higher roughness was observed after thermal cycling for all resin-based composites tested, without significant surface loss; and higher biofilm deposition was observed on the giomer samples when submitted to erosive challenge after 3 and 24 hours. [ABSTRACT FROM AUTHOR] |
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Supplemental Index |
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