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Surface conditioning of a composite used for inlay/onlay restorations: Effect on μTBS to resin cement
  • Federal University of Santa Maria
  • Universidade Estadual Paulista (UNESP)
  • Foundation for Science Development
  • School of Dentistry
Purpose: To assess the effect of the composite surface conditioning on the microtensile bond strength of a resin cement to a composite used for inlay/onlay restorations. Materials and Methods: Forty-two blocks (6 × 6 × 4 mm) of a microfilled composite (Vita VMLC) were produced and divided into 3 groups (N = 14) by composite surface conditioning methods: Gr1 - etching with 37% phosphoric acid, washing, drying, silanization; Gr2 - air abrasion with 50-l̀m Al2O3 particles, silanization; Gr3 - chairside tribochemical silica coating (CoJet System), silanization. Single-Bond (one-step adhesive) was applied on the conditioned surfaces and the two resin blocks treated with the same method were cemented using RelyX ARC (dual-curing resin cement). The specimens were stored for 7 days in water at 37°C and then sectioned to produce nontrimmed beam samples, which were submitted to microtensile bond strength testing (μTBS). For statistical analysis (one-way ANOVA and Tukey's test, · = 0.05), the means of the beam samples from each luted specimen were calculated (n = 7). Results: μTBS values (MPa) of Gr2 (62.0 ± 3.9a) and Gr3 (60.5 ± 7.9a) were statistically similar to each other and higher than Gr1 (38.2 ± 8.9b). The analysis of the fractured surfaces revealed that all failures occurred at the adhesive zone. Conclusion: Conditioning methods with 50-l̀m Al2O3 or tribochemical silica coating allowed bonding between resin and composite that was statistically similar and stronger than conditioning with acid etching.
Issue Date: 
Journal of Adhesive Dentistry, v. 9, n. 6, p. 495-498, 2007.
Time Duration: 
  • Composite
  • Inlay
  • Microtensile bond strength
  • Surface conditioning
  • Tribochemical silica coating
  • aluminum oxide
  • bisphenol A bis(2 hydroxypropyl) ether dimethacrylate
  • dentin bonding agent
  • ESPE bonding system
  • macrogol derivative
  • phosphoric acid
  • polymethacrylic acid derivative
  • RelyX ARC
  • resin
  • resin cement
  • silane derivative
  • silicon dioxide
  • single bond
  • unclassified drug
  • water
  • adhesion
  • chemistry
  • dental acid etching
  • dental bonding
  • dental etching
  • dental surgery
  • human
  • materials testing
  • mechanical stress
  • surface property
  • temperature
  • tensile strength
  • Acid Etching, Dental
  • Adhesiveness
  • Aluminum Oxide
  • Bisphenol A-Glycidyl Methacrylate
  • Composite Resins
  • Dental Bonding
  • Dental Etching
  • Dentin-Bonding Agents
  • Humans
  • Inlays
  • Materials Testing
  • Phosphoric Acids
  • Polyethylene Glycols
  • Polymethacrylic Acids
  • Resin Cements
  • Silanes
  • Silicon Dioxide
  • Stress, Mechanical
  • Surface Properties
  • Temperature
  • Tensile Strength
  • Water
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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