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Online ISSN 1827-174X
Mundim F. M., Da Fonseca Roberti Garcia L., Silva Sousa A. B., Cruvinel D. R., De Carvalho Panzeri Pires-De-Souza F.
Ribeirao Preto School of Dentistry, University of São Paulo, Ribeirao Preto, SP, Brazil
AIM: The aim of this study was to evaluate the influence of artificial accelerated aging on the color stability and opacity of composites of different shades.
METHODS: Four composites for direct use (Heliomolar, 4 Seasons, Tetric EvoCeram; QuiXfil) and one for indirect use (SR Adoro) in two shades were used: light (A2) and dark (C3 for direct, and D4 for indirect composite). QuiXfil was obtained in Universal shade. A Teflon matrix (12 X 2 mm) was used to obtain 54 specimens (N=6), which were submitted to color and opacity analysis (Spectrophotometer PCB 6807, Byk Gardner) before and after artificial accelerated aging for 384 hours.
RESULTS: After the statistical analysis (2-way ANOVA - Bonferroni - P<0.05), significant color alteration was observed in the light and dark composites studied (P<0.05), with the exception of QuiXfil. Composite 4 Seasons/C3 showed less color alteration (ΔE=0.91). The opacity alteration (ΔOP) was higher for light composites.
CONCLUSION: Artificial accelerated aging interfered in the optical properties assessed; however, the alterations seemed to be more related to the composites composition than to their shade.