Publicação: Influence of acid-etching and ceramic primers on the repair of a glass ceramic
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Data
2012-03-01
Orientador
Coorientador
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Resumo
The 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.
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Palavras-chave
Alloy Primer, aluminum silicate, dental material, Filtek Supreme, Glass ceramics, hydrofluoric acid, Metal Primer, methacrylic acid derivative, potassium derivative, resin, resin cement, Scotchbond Multi Purpose, Scotchbond Multi-Purpose, silane derivative, thioketone, triazine derivative, V Primer, V-Primer, Vita Mark II, water, ceramics, chemistry, comparative study, controlled clinical trial, controlled study, dental acid etching, dental bonding, dental porcelain, dental procedure, feldspar, human, instrumentation, materials testing, mechanical stress, methodology, randomized controlled trial, scanning electron microscopy, surface property, temperature, tensile strength, time, tooth brushing, tooth prosthesis, Acid Etching, Dental, Aluminum Silicates, Ceramics, Composite Resins, Dental Bonding, Dental Materials, Dental Polishing, Dental Porcelain, Dental Prosthesis Repair, Dental Stress Analysis, Humans, Hydrofluoric Acid, Materials Testing, Methacrylates, Microscopy, Electron, Scanning, Potassium Compounds, Resin Cements, Silanes, Stress, Mechanical, Surface Properties, Temperature, Tensile Strength, Thiones, Time Factors, Triazines, Water
Idioma
Inglês
Como citar
General Dentistry, v. 60, n. 2, 2012.
