Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
Vol. 10, No. 2, 2011, pp. 124-129
Bioline Code: os11025
Full paper language: English
Document type: Research Article
Document available free of charge
Brazilian Journal of Oral Sciences, Vol. 10, No. 2, 2011, pp. 124-129
© Copyright 2011 Braz J Oral Sci.
Influence of ceramic primers on microshearbond strength between resin cements andzirconia-based ceramic|
Gotti, Valéria Bisinoto; Filho, Saturnino Calabrez; Shimano, Marcos Massao; Borges, Gilberto Antônio; Borges, Luiz Henrique & de Souza Gonçalves, Luciano
Aim: This study evaluated the effect of a coupling agent ceramic primer (CP) on the microshear bond strength (ìsbs) between luting cements and zirconia-based ceramic.
Methods: Zirconia discs (Cercon) were made and finished with silicon carbide paper and submitted to air abrasion using 50 µm aluminum oxide particles (Al2O3) under 4 bar pressure. Zirconia disks were randomly assigned to four groups (n=10): (G1) ResiCem luting cement + Porcelain Primer, (G2) ResiCem luting cement only, (G3) Clearfil Esthetic Cement + Clearfil Ceramic Primer and (G4) Clearfil Esthetic Cement only. The luting cements were prepared according to manufacturers’ recommendations and inserted in an elastomeric mold positioned onto a zirconia disc. Each specimen was photoactivated by 20 s. The specimens were stored at 100% relative humidity and 37ºC for 24 h. The ìsbs test was performed using universal testing machine at a crosshead speed of 0.5 mm/min. An optical microscope was used to analyze the failure modes and illustrative images were captured with a scanning electron microscope. The ìsbs data were analyzed by two-way ANOVA (p<0.05).
Results: No significant difference was found among the four groups G1 (17.4±6.8), G2 (17.1±5.5), G3 (15.6±5.5) and G4 (14.2±3.5), all of which showed 100% of adhesive failures.
Conclusions: CP showed no increase in the ìsbs between zirconia-based ceramic and resin luting cements.
zirconia, dual luting cement, bond strength.
Alternative site location: http://www.fop.unicamp.br/brjorals