Dental Materials

Effect of surface treatments on the bond strength of a zirconia-reinforced ceramic to composite resin Efeito de tratamentos de superfície sobre a resistência de união entre cerâmica reforçada por zircônia e resina composta Abstract: The objective of this study was to evaluate the tensile (σt) and shear bond strength (σs) of a glass-infiltrated alumina-based zirconia-reinforced ceramic (IZ- Vita In-Ceram Zirconia) to a composite resin, testing the hypothesis that silica coating (SC- Cojet, 3M-Espe) produces higher bond strength values than other ceramic surface treat-ments. Specimens were fabricated and tested according to the manufacturers ’ instructions, and to ISO6872 and ISO11405 specifications. Sixty IZ disk specimens were polished through 1 µm and divided into 3 groups (n = 20) according to the following surface treat-ments: HF- 9.5 % hydrofluoric acid (Ultradent) for 1 min; SB- sandblasting with 25-µm aluminum oxide particles for 10 s; SC- silica coating for 10 s. Silane (3M-Espe), adhesive (Single Bond, 3M-Espe) and a composite resin cylinder (Z100, 3M-Espe) were applied an