Effects of intrapulpal pressure on the long-term bond strength and nanoleakage of resin-dentin interfaces produced by self-adhesive cements: an in vitro study

• Grant number: 08/05179-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2009
• End date: January 31, 2010
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: André Figueiredo Reis
• Grantee: Rodrigo Sversut de Alexandre
• Host 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 storage time on the bond strength and nanoleakage patterns of resin-dentin interfaces produced by different self-adhesive cements. Three self-adhesive cements will be used: RelyX Unicem (3M Espe), BisCem (Bisco), Maxcem (Kerr); and two conventional resin cements: Rely X ARC (3M Espe), Panavia F (Kuraray). One hundred human third molars will be used. Teeth will be randomly distributed in 5 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 water storage time: 24 hours and 12 months. Discs of pre-polymerized composite resin will be cemented according to manufacturers' instructions. After the storage periods, the restored teeth (n=4) 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 (n=5) 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.

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)

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, JUL-AUG 2018. (08/07628-7, 09/16261-2, 14/23401-3, 08/05179-0, 07/06083-4)

DE ALEXANDRE, R. S.; SANTANA, V. B.; KASAZ, A. C.; ARRAIS, C. A. G.; RODRIGUES, J. A.; REIS, A. F.. Effect of Long-term Simulated Pulpal Pressure on the Bond Strength and Nano leakage of Resin-luting Agents With Different Bonding Strategies. Operative Dentistry, v. 39, n. 5, p. 508-520, SEP-OCT 2014. (08/05179-0, 09/16261-2)

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, MAR-APR 2016. (08/07628-7, 09/16261-2, 14/23401-3, 08/05179-0, 07/06083-4)