Revista de Odontologia da UNESP
ISSN 1807-2577 (Eletrônico)
Artigo Original

Bond strength of a composite resin to glass ionomer cements using different adhesive systems

Resistência de união de uma resina composta a cimentos de ionômeros de vidro utilizando diferentes sistemas adesivos

Ana Carolina de Oliveira Becci, Mônica de Souza Benetti, Natália Bertolo Domingues, Elisa Maria Aparecida Giro

Abstract

Introduction: Glass ionomer cements are often used as a base or cavity lining prior to restorative material. Objective: To evaluate the bond strength of a composite resin to different glass ionomer cements, when using a two-step conventional and self-etching adhesive systems. Material and method: Three glass ionomer cements (Ketac Molar Easymix, Vitremer and Vitrebond), the composite resin Filtek Z350 XT and the adhesive systems Adper Single Bond 2, Clearfil SE Bond and Adper Easy One were used. As negative control, resin was bonded to cement without using an adhesive system. Holes (4 mm diameter, 2 mm deep) prepared in acrilic bloks were filled with the glass ionomer cements (n=12/group). On the surface, an area of 1mm in diameter was delimited, the adhesive system was applied, and a specimen of composite resin with 1 mm height was made. After 24 hours storage (37 °C and 100% humidity), the microshear test was performed. Data were analyzed using two-way ANOVA and Tukey test for comparison between groups (α=0.05). Result: The adhesive systems significantly improved the bond strenght of composite resin to glass ionomer cements (p≤0.001). There was no significant difference in bond strength when self-etching adhesive systems were compared with the simplified etch-and-rinse adhesive, except for Vitrebond where Clearfil SE Bond determined higher bond strength when compared to Adper Single Bond 2 (p=0.003). Conclusion: Self-etching adhesive systems are a good option for establishing the bond between the composite resin and the glass ionomer cement.

Keywords

Glass ionomer cements; dentin-bonding agents; composite resins; shear strength.

Resumo

Introdução: Os cimentos de ionômero de vidro são frequentemente usados como base ou forramento cavitário, previamente ao material restaurador. Objetivo: Avaliar a resistência de união da resina composta a diferentes cimentos de ionômero de vidro, utilizando sistemas adesivos convencional simplificado e auto-condicionantes. Material e método: Foram utilizados três cimentos (Ketac Molar Easymix, Vitremer e Vitrebond), a resina Filtek Z350 XT e os sistemas adesivos Adper Single Bond 2, Clearfil SE Bond e Adper Easy One. Como controle negativo, a resina foi aplicada sobre o cimento sem a utilização de sistema adesivo. Cavidades (4 mm de diâmetro e 2 mm de profundidade), confeccionadas em blocos acrílicos, foram preenchidas com os cimentos ionoméricos (n=12/grupo). Na superfície foi delimitada uma área de 1mm de diâmetro, aplicado o sistema adesivo e confeccionado um espécime de resina composta com 1 mm de altura. Após 24 horas de armazenamento (37 °C e 100% de umidade), foi realizado o ensaio de microcisalhamento. Os dados foram analisados usando ANOVA a dois fatores, e teste de Tukey para comparação entre grupos (α=0,05). Resultado: Os sistemas adesivos melhoraram significativamente a resistência de união resina/cimento de ionômero de vidro (p≤0,001). Não houve diferença significativa na resistência de união quando os sistemas adesivos auto-condicionantes foram comparados com o convencional simplificado, com exceção no Vitrebond onde o Clearfil SE Bond determinou maior resistência de união quando comparado com o Adper Single Bond 2 (p=0,003). Conclusão: Os sistemas adesivos auto-condicionantes constituem uma boa opção para estabelecer a união entre resina composta e cimento de ionômero de vidro.

Palavras-chave

Cimentos de ionômeros de vidro; adesivos dentinários; resinas compostas; resistência ao cisalhamento.

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