Effect of curing mode on the hardness of dual-cured composite resin core build-up materials

Autor(es)

César Augusto Galvão Arrais ^[1] ; Aline de Cerqueira Kasaz ^[2] ; Luís Gustavo Barrote Albino ^[3] ; José Augusto Rodrigues ^[4] ; Andre Figueiredo Reis ^[5]

Afiliação do(s) autor(es)

^[1] University of Guarulhos. School of Dentistry. Department of Operative Dentistry - Brasil

^[2] University of Guarulhos. School of Dentistry. Department of Operative Dentistry - Brasil

^[3] University of Guarulhos. School of Dentistry. Department of Operative Dentistry - Brasil

^[4] University of Guarulhos. School of Dentistry. Department of Operative Dentistry - Brasil

^[5] University of Guarulhos. School of Dentistry. Department of Operative Dentistry - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Oral Research; v. 24, n. 2, p. 245-249, 2010-06-00.

Resumo

This study evaluated the Knoop Hardness (KHN) values of two dual-cured composite resin core build-up materials and one resin cement exposed to different curing conditions. Two dual-cured core build-up composite resins (LuxaCore®-Dual, DMG; and FluoroCore®2, Dentsply Caulk), and one dual-cured resin cement (Rely X ARC, 3M ESPE) were used in the present study. The composite materials were placed into a cylindrical matrix (2 mm in height and 3 mm in diameter), and the specimens thus produced were either light-activated for 40 s (Optilux 501, Demetron Kerr) or were allowed to self-cure for 10 min in the dark (n = 5). All specimens were then stored in humidity at 37°C for 24 h in the dark and were subjected to KHN analysis. The results were submitted to 2-way ANOVA and Tukey's post-hoc test at a pre-set alpha of 5%. All the light-activated groups exhibited higher KHN values than the self-cured ones (p = 0.00001), regardless of product. Among the self-cured groups, both composite resin core build-up materials showed higher KHN values than the dual-cured resin cement (p = 0.00001). LuxaCore®-Dual exhibited higher KHN values than FluoroCore®2 (p = 0.00001) when they were allowed to self-cure, while no significant differences in KHN values were observed among the light-activated products. The results suggest that dual-cured composite resin core build-up materials may be more reliable than dual-cured resin cements when curing light is not available. (AU)

• Processo FAPESP: 04/01175-0 - Efeito in vitro e in situ de diferentes sistemas clareadores caseiros sobre a microdureza do esmalte dental humano e efetividade clínica
• Beneficiário: José Augusto Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 07/06447-6 - Análise da resistência de união, nanoinfiltração e características ultramorfológicas das interfaces de união resina-dentina produzidas por cimentos auto-adesivos ao longo do tempo
• Beneficiário: Alline de Cerqueira Kasaz
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 07/06083-4 - Análise da resistência de união, nanoinfiltração e características ultramorfológicas das interfaces de união resina-dentina produzidas por cimentos auto-adesivos ao longo do tempo
• Beneficiário: André Figueiredo Reis
• Modalidade de apoio: Auxílio à Pesquisa - Regular