Impact of light-curing time and aging on dentin bond strength of methacrylate- and silorane-based restorative systems

Autor(es)

Anderson Catelan ^[1] ; Giulliana Panfiglio Soares ^[2] ; Ana Karina Bedran-Russo ^[3] ; Débora Alves Nunes Leite Lima ^[4] ; Giselle Maria Marchi ^[5] ; Flávio Henrique Baggio Aguiar ^[6]

Afiliação do(s) autor(es)

^[1] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[2] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[3] University of Illinois at Chicago. College of Dentistry. Department of Restorative Dentistry - Estados Unidos

^[4] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[5] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[6] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Braz. J. Oral Sci.; v. 13, n. 3, p. 213-218, 2014-09-00.

Resumo

AIM: To evaluate the impact of different light-curing times on dentin microtensile bond strength of two restorative systems after 24 h and 6 months of water storage. METHODS: Standardized Class II preparations were performed in 56 freshly-extracted human molars (n = 7), restored with methacrylate- or silorane-based restorative systems, and light-cured using a light-emitting diode at 1390 mW/cm2 by the recommended manufacturers' time or double this time. After storage for 24 h at 37 oC, the teeth were sectioned to yield a series of 0.8-mm thick slices. Each slab was trimmed into an hourglass shape of approximately 0.64 mm2 area at the gingival dentin-resin interface. Specimens were tested using universal testing machine at crosshead speed of 0.5 mm/min until failure, after 24 h and 6 months of storage. Data were statistically analyzed by three-way ANOVA and Tukey's test (α = 0.05). RESULTS: The highest bond strength values were recorded for the groups restored with methacrylate system (p<0.001) as well as for extended light-curing time (p = 0.0034). There was no statistically significant difference between 24 h and 6 months storage on bond strength (p>0.05). CONCLUSIONS: Bond strength was influenced by the material and light-curing time, but the 6-month storage did not affect the bond strength of restorations. (AU)

• Processo FAPESP: 10/15076-4 - Influência da densidade de energia nas propriedades físicas e resistência de união de dois sistemas restauradores
• Beneficiário: Flávio Henrique Baggio Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/05666-9 - Influência da densidade de energia nas propriedades físicas e resistência de união de dois sistemas restauradores
• Beneficiário: Anderson Catelan
• Modalidade de apoio: Bolsas no Brasil - Doutorado