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Artigo Científico | Restauração | Inglês | 10/01/2008
Autores: Andrigo dos Reis Batista, Juliane Cristina Ciccone-Nogueira, Juliano Fernandes Sassi, Regina Guenka Palma-Dibb, S.A.M. Corona
Palavras-chave: adhesion, dentin, enamel, microleakage, photopolymerization devices
Resumo: The aim of the present study was to evaluate the influence of different photopolymerization (halogen, halogen soft-start and LED) systems on shear bond strength (SBS) and marginal microleakage of composite resin restorations. Forty Class V cavities (enamel and dentin margins) were prepared for microleakage assessment, and 160 enamel and dentin fragments were prepared for the SBS test, and divided into 4 groups. Kruskal-Wallis and Wilcoxon tests showed statistically significant difference in microleakage between the margins (p < 0.01) with incisal margins presenting the lowest values. Among the groups, it was observed that, only at the cervical margin, halogen soft-start photo polymerization presented statistically significant higher microleakage values. For SBS test, ANOVA showed no statistical difference (p > 0.05) neither between substrates nor among groups. It was concluded that Soft-Start technique with high intensity end-light influenced negatively the cervical marginal sealing, but the light-curing systems did not influence adhesion.
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