Long-term microtensile bond strength of surface modified zirconia
| Autor: | Carlos Villanueva, Brian R. Stoner, Robert L. Smith, Jeffrey R. Piascik, Cristina Garcia-Godoy, Jeffrey Y. Thompson, James Rothrock |
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| Rok vydání: | 2010 |
| Předmět: |
Dental composite
Dental Stress Analysis Materials science Time Factors Surface Properties Carbon Compounds Inorganic Composite number Dental Cements Dental bonding Composite Resins Dental Materials Dental porcelain Acid Etching Dental Tensile Strength Ultimate tensile strength Materials Testing Aluminum Oxide Humans General Materials Science Cubic zirconia Phosphoric Acids Composite material General Dentistry Universal testing machine Bond strength Silicon Compounds Dental Bonding Temperature Water Silanes Silicon Dioxide Dental Porcelain Dental Polishing Resin Cements Mechanics of Materials Dental Etching Stress Mechanical Zirconium Salicylic Acid |
| Zdroj: | Dental materials : official publication of the Academy of Dental Materials. 27(8) |
| ISSN: | 1879-0097 |
| Popis: | Objective To compare long-term microtensile bond strength of zirconia, surface-modified via a novel treatment, to current surface conditioning methods for zirconia, when resin bonded to dental composite. Methods Two ProCAD (porcelain) and 10 sintered ZirCAD (ZrO 2 ) blocks (18 mm × 14 mm × 12 mm) were obtained from manufacturers. Twelve Herculite XRV composite blocks were fabricated (18 mm × 14 mm × 12 mm). Bonding surface of blocks was polished through 1200-grit SiC and air-abraded (50 μm alumina, 0.28 MPa, 20 s). Blocks were then separated into six groups: (1) porcelain (control), HF-etched/silane-treated, (2) ZrO 2 , tribochemical-coated/silane-treated, (3) ZrO 2 , primer-treated, (4) ZrO 2 , modified via novel 3.2 nm silica layer/silane-treated, (5) ZrO 2 , modified via novel 5.8 nm silica layer/silane-treated, and (6) ZrO 2 , modified via novel 30.4 nm silica layer/silane-treated. Blocks were bonded to composite using Clearfil Esthetic cement. Blocks were stored in distilled water (37 °C, 24 h), then cut into microtensile bars ( n = 8/gp), then bond strengths were measured using a universal testing machine at 0, 1, 3, and 6 months. All groups were statistically analyzed (ANOVA, Tukey's, p Results At 6 months (aging), all silica seed layer specimens displayed microtensile bond strength similar to CoJet specimens but less than that of silane-modified dental porcelain. Conclusion The deposition of a silica layer on zirconia resulted in similar or superior long-term resin bond strength when compared to traditional silanation and bonding techniques for zirconia but lower than that for silane-treated dental porcelain. |
| Databáze: | OpenAIRE |
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