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- Title
Surface roughness, gloss and color change of different composites after exposure to ultimate challenges.
- Authors
Lemos, Cleidiel Aparecido Araujo; Mauro, Silvio José; Briso, André Luiz Fraga; de Souza, Fernanda de Carvalho Panzeri Pires; de Lima Navarro, Maria Fidela; Fagundes, Ticiane Cestari
- Abstract
Aim: The study aimed to investigate the effect of the association of chemical and mechanical degradation on the surface roughness, gloss and color of nano and microfilled composites. Method: Disc-shaped specimens (n=10) were prepared for three nanocomposites (Filtek Z350XT, IPS Empress Direct. Charisma Diamond) and three microfilled composites (Estelite Z Quick. Durafill VS, Renamel). After polishing, baseline surface roughness, gloss and color measurements were obtained. Specimens were submitted subsequently to the following challenges: chemical for 1 week (Hydrochloric acid, Coca-Cola and Red Wine) and mechanical (Toothbrushing). Surface roughness and gloss data were analyzed by Kruskal-Wallis followed by Dunn's test Color difference (AE) was analyzed by one-way ANOVA and Tukey test. Results: The initial data were compared with those after challenges using the Wilcoxon test (p<0.05). All composites showed a significant increase (p<0.05) of surface roughness, after overstress. Filtek Z350 XT and Renamel had the lowest final surface roughness values and roughness increase (p<0.05). The comparative analysis revealed that Estelite I Quick and Renamel did not significantly change the gloss after challenges (p=0.185). Filtek Z350 XT and IPS Empress Direct had higher color variations, after the challenges than the other resins (p<0.05). Conclusion: Chemical and mechanical challenges influence on characteristics of all composites, except for gloss on Estelite I Quick and Renamel composites.
- Subjects
SURFACE roughness; CHEMICAL decomposition; NANOCOMPOSITE materials; DENTAL resins; ANALYSIS of variance
- Publication
Brazilian Journal of Oral Sciences, 2017, Vol 16, p1
- ISSN
1677-3217
- Publication type
Article
- DOI
10.20396/bjos.v16i0.8651057