Shear bond strength to resin composite of layering ceramic submitted to different surface treatments

Naiky Daiane Rodrigues Lopes Cecília Pedroso Turssi, Fabiana Mantovani Gomes França, Roberta Tarkany Basting Hofling, Milton Edson Miranda, Flávia Lucisano Botelho do Amaral

Introduction / his study assessed the bond strength to resin composite of a layering ceramic submitted to diferent surface treatments. / Methods / hirty ceramic discs (IPS e.max Ceram, Ivoclar, Vivadent) (5-mm diameter, 2-mm high) were manufactured and randomly divided into three groups (n = 10) according to the treatment applied to ceramic surface: G1) 10% luoridric acid conditioning for 20 seconds; G2) aluminum oxide sandblasting + 10% luoridric acid conditioning for 20 seconds; G3) aluminum oxide sandblasting. Subsequently, silane-coupling agent was applied for 60 seconds followed by one layer of adhesive (Tetric N-Bond, Ivoclar, Vivadent) light-cured for 20 seconds. Samples were ixed to a metallic device, where microhybrid resin composite cylinders were built. After being stored for 24 hours, samples were submitted to shear bond strength testing (speed of 0.5 mm/min). Data was submitted to analysis of variance (ANOVA) with signiicance level set at 5%. Fracture pattern (adhesive, cohesive, mixed) was analyzed by stereomicroscopy (20 x magniication). / Results / here was no statistical difference among bond strength values of G1, G2 and G3. As for the fracture pattern, cohesive was predominant in ceramic pattern. / Conclusion / Association of aluminum oxide sandblasting and 10% luoridric acid conditioning did not enhance bond strength of vitreous ceramic to resin composite when compared to these agents applied in isolation.

Keywords: Ceramics. Aluminum oxide. Fluoridric acid. Shear bond strength.

How to cite: Lopes NDR, Turssi CP, França FMG, Holing RTB, Miranda ME, Amaral FLB. Resistência adesiva de cerâmica de cobertura, submetida a diferentes tratamentos de superfície, a uma resina composta. Rev Dental Press Estét. 2015 jan-mar;12(1):46-54

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