Effect of cavity-cleaning agents on shear bond strength between self-etching adhesives and dentin

  • Tamiris Alacoque de Carvalho Freitas School of Dentistry, Federal University of Juiz de Fora
  • Bruno Salles Sotto-Maior School of Dentistry, Federal University of Juiz de Fora
  • Mariele Ferraz de Oliveira School of Dentistry, Federal University of Juiz de Fora
  • Fabiana Cesar Costa School of Dentistry, Federal University of Juiz de Fora
  • Luciana Andrea Salvio School of Dentistry, Federal University of Juiz de Fora
Keywords: Chlorhexidine, Dental bonding, Adhesives.


Aim: The effect of cavity-cleaning agents on shear bonding strength between self-etching adhesives and dentin was evaluated. Methods: Twenty-five healthy human third molars were worn to obtain flat middle dentin. The samples were randomly divided into five groups according to the cleaning agent used: group CB not treated with any cavity disinfectants and served as control. Following groups, dentin surfaces were treated with 2% chlorhexidine (CHX group); 3% hydrogen peroxide (HP group); calcium hydroxide water (CH group); and 70% ethyl ethanol (E group). The dentin surfaces were cleaned by friction for 20 s and dentine bonding agent, Clearfil SE Bond, was applied. Cylinders (5.0 mm  1.2 mm, n = 19) of fluid composite resin were placed on the dentin surface, and the teeth were stored in deionized water at 37°C for 24 h. Subsequently, the samples were subjected to the shear bonding test, and the obtained values were subjected to one-way ANOVA and Tukey’s test (α = 0.05). The failure pattern was analyzed descriptively by examining the specimens with a stereoscope at a magnification of 4, and failure was classified into adhesive, cohesive or mixed type. Results: Shear bonding was significantly lower in group HP (6.17 ± 5.69 MPa). The groups CB, CHX, CH and E were statiscally similar, 22.15 ± 6.54MPa; 18.40 ± 7.26MPa; 18.07 ± 5.98MPa ; 16.43 ± 6.19MPa respectively. The failure modes observed were only adhesive and mixed. Conclusion: The use of 2% chlorhexidine, calcium hydroxide water, and 70% ethyl ethanol did not negatively affect bond strength. Only 3% hydrogen peroxide is contraindicated as a cavity cleaner in adhesive restorative procedures when self-etching system is used.


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Author Biographies

Tamiris Alacoque de Carvalho Freitas, School of Dentistry, Federal University of Juiz de Fora
Department of Restorative Dentistry
Bruno Salles Sotto-Maior, School of Dentistry, Federal University of Juiz de Fora
Department of Restorative Dentistry
Mariele Ferraz de Oliveira, School of Dentistry, Federal University of Juiz de Fora
Department of Restorative Dentistry
Fabiana Cesar Costa, School of Dentistry, Federal University of Juiz de Fora
Department of Restorative Dentistry
Luciana Andrea Salvio, School of Dentistry, Federal University of Juiz de Fora
Department of Restorative Dentistry


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How to Cite
Freitas, T. A. de C., Sotto-Maior, B. S., Oliveira, M. F. de, Costa, F. C., & Salvio, L. A. (2019). Effect of cavity-cleaning agents on shear bond strength between self-etching adhesives and dentin. Brazilian Journal of Oral Sciences, 18, e190886. https://doi.org/10.20396/bjos.v18i0.8655149