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Effect of cyclic compressive loading on the bond strength of an adhesive system to dentin after collagen removal
  • Universidade Estadual Paulista (UNESP)
  • Universidade Estadual de Campinas (UNICAMP)
Purpose: The objective of this study was to verify the effect of cyclic compressive loading on the shear bond strength of an adhesive system following collagen removal. Materials and Methods: Sixty bovine teeth were divided into 4 groups based on the adhesive procedure used: groups 1 and 2 - etching with 35% phosphoric acid and application of the Single Bond adhesive system; groups 3 and 4 - after etching, a 10% sodium hypochlorite solution was applied for 1 min before the application of the adhesive. In all the specimens, a Z100 resin cylinder was built up over the bond area. Groups 2 and 4 were submitted to 500,000 cycles with a load of 100 N. Results: The mean values for the shear bond test (MPa) were: group 1: 7.37 ± 1.15; group 2: 5.72 ± 1.66; group 3: 5.95 ± 1.21; group 4: 3.66 ± 1.12. There was no difference between groups 1 and 2 (p > 0.01). Between groups 1 and 3, 2 and 4, and 3 and 4 there was a significant difference (p < 0.01). The majority of the specimens demonstrated an adhesive failure. Conclusion: The application of sodium hypochlorite on dentin decreased the values of shear bond strength, as did the load cycling in the group treated with sodium hypochlorite.
Issue Date: 
Journal of Adhesive Dentistry, v. 7, n. 2, p. 127-131, 2005.
Time Duration: 
  • Adhesive system
  • Bond strength
  • Collagen removal
  • Sodium hypochlorite
  • bisphenol A bis(2 hydroxypropyl) ether dimethacrylate
  • collagen
  • dentin bonding agent
  • hypochlorite sodium
  • oxidizing agent
  • phosphoric acid
  • resin
  • silicon dioxide
  • single bond
  • Z100 composite resin
  • zirconium
  • animal
  • cattle
  • chemistry
  • dental acid etching
  • dental bonding
  • dentin
  • mechanical stress
  • shear strength
  • ultrastructure
  • Acid Etching, Dental
  • Bisphenol A-Glycidyl Methacrylate
  • Phosphoric Acids
  • Shear Strength
  • Silicon Dioxide
  • Sodium Hypochlorite
  • Stress, Mechanical
  • Zirconium
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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