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Fatigue resistance of the bond of a glass-infiltrated alumina ceramic to human dentin
  • University of Bologna
  • Federal University of Santa Maria
  • University of Siena
  • Universidade Estadual Paulista (UNESP)
  • Dept. of Restorative Dentistry
Purpose: To evaluate the fatigue resistance of the bond between dentin and glass-infiltrated alumina ceramic, using different luting protocols. Materials and Methods: The null hypothesis is that the fatigue resistance varies with the luting strategy. Forty blocks of In-Ceram Alumina were prepared, and one surface of each block was abraded with 110-μm aluminum oxide particles. Then, the blocks were luted to flat dentin surfaces of 40 human third molars, using 4 different luting strategies (luting system [LS]/ceramic surface conditioning [CSC]) (n=10): (G1) [LS] RelyX-Unicem/[CSC] airborne abrasion with 110-μm Al2O3 particles; (G2) [LS] One-Step + Duo-Link (bis-GMA-based resin)/[CSC] etching with 4% hydrofluoric acid + silane agent; (G3) [LS] ED-Primer + Panavia F (MDP-based resin)/[CSC] Al2O 3; (G4) [LS] Scotchbond1+RelyX-ARC (bis-GMA-based resin)/[CSC] chairside tribochemical silica coating (air abrasion with 30-μm SiO x particles + silane). After 24 h of water storage at 37°C, the specimens were subjected to 106 fatigue cycles in shear with a sinusoidal load (0 to 21 N, 8 Hz frequency, 37°C water). A fatigue survivor score was given, considering the number of the fatigue cycles until fracture. The failure modes of failed specimens were observed in a SEM. Results: G3 (score = 5.9, 1 failure) and G4 (score = 6, no failures) were statistically similar (p = 0.33) and had significantly higher fatigue resistance than G1 (score = 3.9, 5 failures) and G2 (score = 3.7, 6 failures) (p < 0.03). SEM analysis of fractured specimens of G1 and G2 showed that almost all the failures were between ceramic and cement. Conclusion: The MDP-based resin cement + sandblasting with Al2O3 particles (G3) and bis-GMA-based resin cement + tribochemical silica coating (G4), both using the respective dentin bonding systems, were the best luting protocols for the alumina ceramic. The null hypothesis was confirmed.
Issue Date: 
Journal of Adhesive Dentistry, v. 8, n. 2, p. 97-104, 2006.
Time Duration: 
  • Alumina ceramic
  • Fatigue resistance
  • Luting systems
  • Tribochemical silica coating
  • aluminum oxide
  • bisphenol A bis(2 hydroxypropyl) ether dimethacrylate
  • dentin bonding agent
  • Duo Link
  • Duo-Link
  • ED Primer II
  • glass
  • hydrofluoric acid
  • In Ceram
  • In-Ceram
  • macrogol derivative
  • methacrylic acid derivative
  • One Step dentin bonding system
  • One-Step dentin bonding system
  • Panavia Fluoro
  • Panavia-Fluoro
  • polymethacrylic acid derivative
  • Rely X Unicem
  • RelyX ARC
  • resin cement
  • silane derivative
  • silicon dioxide
  • tooth cement
  • ceramics
  • chemistry
  • dental acid etching
  • dental bonding
  • dental surgery
  • dentin
  • human
  • materials testing
  • mechanical stress
  • methodology
  • scanning electron microscopy
  • scotchbond
  • surface property
  • tooth prosthesis
  • ultrastructure
  • Acid Etching, Dental
  • Air Abrasion, Dental
  • Aluminum Oxide
  • Bisphenol A-Glycidyl Methacrylate
  • Ceramics
  • Dental Bonding
  • Dental Cements
  • Dental Porcelain
  • Dentin
  • Dentin-Bonding Agents
  • Glass
  • Humans
  • Hydrofluoric Acid
  • Materials Testing
  • Methacrylates
  • Microscopy, Electron, Scanning
  • Polyethylene Glycols
  • Polymethacrylic Acids
  • Resin Cements
  • Silanes
  • Silicon Dioxide
  • Stress, Mechanical
  • Surface Properties
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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