Artículos de revistas
Kinetic of water diffusion and color stability of a resin composite as a function of the curing tip distance
Fecha
2012Registro en:
Mat. Res.,v.15,n.4,p.603-610,2012
1516-1439
10.1590/S1516-14392012005000070
Autor
Svizero, Nádia da Rocha
Alonso, Roberta Caroline Bruschi
Wang, Linda
Palma-Dibb, Regina Guenka
Atta, Maria Teresa
D'Alpino, Paulo Henrique Perlatti
Institución
Resumen
The influence of curing tip distance and storage time in the kinetics of water diffusion (water sorption-W SP, solubility-W SB, and net water uptake) and color stability of a composite were evaluated. Composite samples were polymerized at different distances (5, 10, and 15 mm) and compared to a control group (0 mm). After desiccation, the specimens were stored in distilled water to evaluate the water diffusion over a 120-day period. Net water uptake was calculated (sum of WSP and WSB). The color stability after immersion in a grape juice was compared to distilled water. Data were submitted to three-way ANOVA/Tukey's test (α = 5%). The higher distances caused higher net water uptake (p < 0.05). The immersion in the juice caused significantly higher color change as a function of curing tip distance and the time (p < 0.05). The distance of photoactivation and storage time provide the color alteration and increased net water uptake of the resin composite tested.