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Microtensile bond strength between a quartz fiber post and a resin cement: Effect of post surface conditioning
  • Universidade Federal de Santa Maria (UFSM)
  • Universidade Estadual Paulista (UNESP)
  • Instituto Tecnológico de Aeronáutica (ITA)
Purpose: To test the bond strength between a quartz-fiber-reinforced composite post (FRC) and a resin cement. The null hypothesis was that the bond strength can be increased by using a chairside tribochemical silica-coating system. Materials and Methods: Thirty quartz-FRCs (Light-Post) were divided into 3 groups according to the post surface treatment: G1) Conditioning with 32% phosphoric acid (1 min), applying a silane coupling agent; G2) etching with 10% hydrofluoric acid (1 min), silane application; G3) chairside tribochemical silica coating method (CoJet System): air abrasion with 30-μ SiO x-modified Al2O3 particles, silane application. Thereafter, the posts were cemented into a cylinder (5 mm diameter, 15 mm height) with a resin cement (Duo-Link). After cementation, the specimens were stored in distilled water (37°C/24 h) and sectioned along the x and y axes with a diamond wheel under cooling (Lab-cut 1010) to create nontrimmed bar specimens. Each specimen was attached with cyanoacrylate to an apparatus adapted for the microtensile test. Microtensile testing was conducted on a universal testing machine (1 mm/min). The data obtained were submitted to the one-way ANOVA and Tukey test (α = 0.05). Results: A significant influence of the conditioning methods was observed (p < 0.0001). The bond strength of G3 (15.14 ± 3.3) was significantly higher than the bond strengths of G1 (6.9 ± 2.3) and G2 (12.60 ± 2.8) (p = 0.000106 and p = 0.002631, respectively). Notwithstanding the groups, all the tested specimens showed adhesive failure between the resin cement and FRC. Conclusion: The chairside tribochemical system yielded the highest bond strength between resin cement and quartz-fiber post. The null hypothesis was accepted (p < 0.0001).
Issue Date: 
Journal of Adhesive Dentistry, v. 8, n. 2, p. 105-111, 2006.
Time Duration: 
  • Bond strength
  • Fiber post
  • Microtensile test
  • Surface conditioning
  • Tribochemical silica coating
  • aluminum oxide
  • Duo Link
  • Duo-Link
  • hydrofluoric acid
  • methacrylic acid derivative
  • methacryloxypropyltrimethoxysilane
  • phosphoric acid
  • resin
  • resin cement
  • silane derivative
  • silicon dioxide
  • chemistry
  • dental acid etching
  • dental bonding
  • dental care
  • dental surgery
  • human
  • instrumentation
  • materials testing
  • mechanical stress
  • methodology
  • surface property
  • tensile strength
  • tooth crown
  • Acid Etching, Dental
  • Air Abrasion, Dental
  • Aluminum Oxide
  • Composite Resins
  • Dental Bonding
  • Dental Stress Analysis
  • Humans
  • Hydrofluoric Acid
  • Materials Testing
  • Methacrylates
  • Phosphoric Acids
  • Post and Core Technique
  • Quartz
  • Resin Cements
  • Silanes
  • Silicon Dioxide
  • Stress, Mechanical
  • Surface Properties
  • Tensile Strength
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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