Queiroz, J. R C [UNESP]Souza, Rodrigo O.A.Nogueira, L.Ozcan, M.Bottino, M. A.2014-05-272014-05-272012-03-01General Dentistry, v. 60, n. 2, 2012.0363-6771http://hdl.handle.net/11449/73227The objective of this study was to evaluate the influence of different primers on the microtensile bond strength (μT BS) between a feldspathic ceramic and two composites. Forty blocks (6.0 × 6.0 × 5.0 mm 3) were prepared from Vita Mark II . After polishing, they were randomly divided into 10 groups according to the surface treatment: Group 1, hydrofluoric acid 10% (HF) + silane; Group 2, CoJet + silane; Group 3, HF + Metal/Zirconia Primer; Group 4, HF + Clearfil Primer; Group 5, HF + Alloy Primer; Group 6, HF + V-Primer; Group 7, Metal/Zirconia Primer; Group 8, Clearfil Primer; Group 9, Alloy Primer; Group 10, V-Primer. After each surface treatment, an adhesive was applied and one of two composite resins was incrementally built up. The sticks obtained from each block (bonded area: 1.0 mm2 ± 0.2 mm) were stored in distilled water at 37°C for 30 days and submitted to thermocycling (7,000 cycles; 5°C/55°C ± 1°C). The μT BS test was carried out using a universal testing machine (1.0 mm/min). Data were analyzed using ANOVA and a Tukey test (α = 0.05). The surface treatments significantly affected the results (P < 0.05); no difference was observed between the composites (P > 0.05). The bond strength means (MPa) were as follows: Group 1a = 29.6; Group 1b = 33.7; Group 2a = 28.9; Group 2b = 27.1; Group 3a = 13.8; Group 3b = 14.9; Group 4a = 18.6; Group 4b = 19.4; Group 5a = 15.3; Group 5b = 16.5; Group 6a = 11; Group 6b = 18; Groups 7a to 10b = 0. While the use of primers alone was not sufficient for adequate bond strengths to feldspathic ceramic, HF etching followed by any silane delivered higher bond strength.engAlloy Primeraluminum silicatedental materialFiltek SupremeGlass ceramicshydrofluoric acidMetal Primermethacrylic acid derivativepotassium derivativeresinresin cementScotchbond Multi PurposeScotchbond Multi-Purposesilane derivativethioketonetriazine derivativeV PrimerV-PrimerVita Mark IIwaterceramicschemistrycomparative studycontrolled clinical trialcontrolled studydental acid etchingdental bondingdental porcelaindental procedurefeldsparhumaninstrumentationmaterials testingmechanical stressmethodologyrandomized controlled trialscanning electron microscopysurface propertytemperaturetensile strengthtimetooth brushingtooth prosthesisAcid Etching, DentalAluminum SilicatesCeramicsComposite ResinsDental BondingDental MaterialsDental PolishingDental PorcelainDental Prosthesis RepairDental Stress AnalysisHumansHydrofluoric AcidMaterials TestingMethacrylatesMicroscopy, Electron, ScanningPotassium CompoundsResin CementsSilanesStress, MechanicalSurface PropertiesTemperatureTensile StrengthThionesTime FactorsTriazinesWaterArtigoAcesso restrito2-s2.0-848584369369234456003563666