Kinetic of water diffusion and color stability of a resin composite as a function of the curing tip distance

Materials Research

Nádia Da Rocha Svizero²  Roberta Caroline Bruschi Alonso¹  Linda Wang¹  Regina Guenka Palma-dibb¹  Maria Teresa Atta¹  Paulo Henrique Perlatti D'alpino¹ 

[1] ,University of São Paulo Hospital for Rehabilitation of Craniofacial Anomalies Bauru SP ,Brazil

关键词: composite resins;    polymerization;    absorption;    solubility;    color;   

DOI  :  10.1590/S1516-14392012005000070

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License