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Effects of simulated pulpal pressure and immediate dentin sealing on the bond strength and nanoleakage patterns of resin-dentin interfaces produced by resin cements

Grant number: 08/07628-7
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2009
Effective date (End): February 28, 2011
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:André Figueiredo Reis
Grantee:Veronica Batista Santana
Home Institution: Universidade de Guarulhos (UNG). Campus Guarulhos-Centro. Guarulhos , SP, Brazil

Abstract

The aim of this in vitro study is to evaluate the effects of intrapulpal pressure and immediate dentin sealing on the bond strength and nanoleakage patterns of resin-dentin interfaces produced by different resin cements. Two self-adhesive cements will be used: RelyX U-cem (3M Espe) and SmartCem (Dentsply Caulk); and two conventional resin cements: Rely X ARC (3M Espe), Panavia F (Kuraray). Eighty human third molars will be used. Teeth will be randomly distributed in 4 groups according to the luting materials and then will be assigned to 4 subgroups, according to the presence or not of positive pulpal pressure and the application or not of the immediate dentin sealing. Discs of pre-polymerized composite resin will be cemented according to manufacturers' instructions. After the storage periods, the restored teeth (n=5) will be serially sectioned, producing beams with a cross-sectional area of 0.8 mm2 at the resin-dentin interface, which will be tested in tension in a universal testing machine. Teeth luted with each material will be submitted to a nanoleakage protocol with AgNO3 after each storage period and will be prepared for observation in a Scanning and Transmission Electron Microscope. The bond strength and nanoleakage data will be statistically analyzed by two-way ANOVA and Tukey test.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SANTANA, V. B.; DE ALEXANDRE, R. S.; RODRIGUES, J. A.; ELY, C.; REIS, A. F.. Effects of Immediate Dentin Sealing and Pulpal Pressure on Resin Cement Bond Strength and Nanoleakage. Operative Dentistry, v. 41, n. 2, p. 189-199, . (08/07628-7, 09/16261-2, 14/23401-3, 07/06083-4, 08/05179-0)
FERREIRA-FILHO, R. C.; ELY, C.; AMARAL, R. C.; RODRIGUES, J. A.; ROULET, J-F; CASSONI, A.; REIS, A. F.. Effect of Different Adhesive Systems Used for Immediate Dentin Sealing on Bond Strength of a Self-Adhesive Resin Cement to Dentin. Operative Dentistry, v. 43, n. 4, p. 391-397, . (08/07628-7, 09/16261-2, 14/23401-3, 07/06083-4, 08/05179-0)

Please report errors in scientific publications list by writing to: cdi@fapesp.br.