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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
César Augusto Galvão Arrais [1] ; Aline de Cerqueira Kasaz [2] ; Luís Gustavo Barrote Albino [3] ; José Augusto Rodrigues [4] ; Andre Figueiredo Reis [5]
Total Authors: 5
Affiliation:
[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
Total Affiliations: 5
Document type: Journal article
Source: Brazilian Oral Research; v. 24, n. 2, p. 245-249, 2010-06-00.
Abstract

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)

FAPESP's process: 07/06447-6 - Long-term evaluation of the bond strength, nanoleakage patterns and ultramorphological characteristics of resin-dentin interfaces produced by self-adhesive cements
Grantee:Alline de Cerqueira Kasaz
Support type: Scholarships in Brazil - Master
FAPESP's process: 07/06083-4 - Long-term evaluation of the bond strength, nanoleakage patterns and ultramorphological characteristics of resin-dentin interfaces produced by self-adhesive cements
Grantee:André Figueiredo Reis
Support type: Regular Research Grants