Color and opacity of composites protected with surface sealants and submitted to artificial accelerated aging

Abstract

Objectives:To evaluate the color similarity, stability and opacity of composites (TPH, Charisma, and Concept, shade A2) protected with surface sealants (Fortify Plus and Biscover) and cyanoacrylate (Super Bonder).Methods:Forty specimens of each composite were made and separated into 4 groups (n=10) according to the surface protection: GI - without sealant; GII - cyanoacrylate; GIII - Fortify Plus; GIV - Biscover. Color and opacity readings were taken before and after Artificial Acelerated Aging (AAA) and the values obtained for color stability were submitted to statistical analysis by 2-way ANOVA and Bonferroni’s test (P<.05). The values acquired for color similarity were submitted to 1-way ANOVA and Tukey’s test (P<.05). The specimen sufaces were compared before and after AAA using Scanning Electronic Microscopy (SEM).Results:Studied composites did not present the same values for the coordinates L*, a* and b * before AAA, indicating that there was no color similarity among them. All composites presented color alteration after AAA with clinically unacceptable values. Protected groups presented lower opacity variation after AAA, in comparison with the control goup. SEM evaluation demonstrated that AAA increased the surface irregularities in all of the studied groups.Conclusion:Surface sealants were not effective in maintaining composite color, but were able to maintain opacity.

Selladores de Superficie en Base a Resina: Potencial de Prevenir Tinción Exógena

“…A.; GALLEGOS, F. A.; BERSEZIO, M. C.; ESTAY, L. J. & ARIAS, F Además, se les atribuye propiedades como mantener la estabilidad de color de la restauración mediante la reducción de acumulación de placa y la prevención de adhesión de pigmentos colorantes en restauraciones de composite, facilitando la limpieza de la restauración mediante la reducción de rugosidad superficial, e incrementando el brillo de la restauración (Aguilar et al, 2012). El objetivo de este estudio fue evaluar la capacidad de los selladores de superficie en base a resinas, de mantener el color de las resinas compuestas de restauración ante la acción de una bebida coloreada.…”

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“…Also, properties such as maintaining the color stability of the restoration by reducing plaque accumulation and preventing the adhesion of coloring pigments on composite restorations, facilitating the cleaning of the restoration by reducing surface roughness, and enhancing the brightness of the restoration can be considered as other advantages of surface sealants. [1,7,17,19,20] There are some studies that examine the effects of these products on microleakage. As it is seen, inconsistent results about eliminating microleakage had been acquired from these studies.…”

Effect of Light Curing Modes on the Color Stability of a Nanohybrid Composite Immersed in Different Beverages

“…Therefore, the color stability of composite restorations is a necessity and the color is expected to remain stable throughout the functional lifetime. Both intrinsic and extrinsic factors cause discoloration of resin composites (1)(2)(3)(4)5). External discolorations result from adsorption and absorption of water-soluble substances through the resin matrix.…”