Influence of Light-Curing Unit Systems on Shear Bond Strength and Marginal Microleakage of Composite Resin Restorations

Autor(es)

Sassi, Juliano Fernandes ; Batista, Andrigo dos Reis ; Ciccone-Nogueira, Juliane Cristina ; Milori Corona, Silmara Aparecida ; Palma-Dibb, Regina Guenka

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 11, n. 1, p. 5-pg., 2008-01-01.

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. (AU)

• Processo FAPESP: 03/10960-0 - Avaliacao da influencia de diferentes sistemas de fotopolimerizacao na microinfiltracao marginal, na resistencia ao cisalhamento e na dureza.
• Beneficiário: Juliano Fernandes Sassi
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 03/00498-7 - Avaliacao in vitro e in situ da influencia de diferentes fontes fotopolimerizadoras nas propriedades de sistemas restauradores.
• Beneficiário: Regina Guenka Palma-Dibb
• Modalidade de apoio: Auxílio à Pesquisa - Regular