Conclusions : The application of a 2 % chlorhexidine solution after acid etching increased the microtensile bond strength significantly for follow-up times of 6 months or more .
The adhesive type had no influence
Background and Objectives : The aim of this systematic review was to examine the effect of 2 % chlorhexidine following acid etching on the microtensile bond strength of resin restorations for different follow-up times .
Effect of 2% chlorhexidine on microtensile bond strength of composite to dentin.
PURPOSE To evaluate the effect of 2 % chlorhexidine on the microtensile bond strength of composite resin to dentin treated with three dentin bonding systems . MATERIAL S AND METHODS Flat dentinal surfaces were prepared in 24 extracted human third molars . Teeth were r and omly divided into 8 distinct experimental groups according to the adhesive applied ( Prime & Bond NT , Single Bond and Clearfil SE Bond ) , the application ( yes/no ) of chlorhexidine , and the time point at which it was applied ( before or after acid etching the dentin ) . Composite resin blocks were built up over treated surfaces , and teeth were then stored in water at 37 degrees C for 24 h. Sample s were thermocycled , stored under the same conditions , and then vertically sectioned , thus obtaining specimens with 1.0 + /- 0.1 mm2 cross-sectional area . Specimens were stressed in tension at 0.5 mm/min crosshead speed . Bond strength results were evaluated using a one-way ANOVA ( p < 0.05 ) . The modes of failures were verified using optical microscopy . Dentin disks were obtained from 3 additional teeth treated in the same manner for observation under SEM . The most representative sample s of fractured specimens were also observed under SEM . RESULTS No statistically significant differences of bond strength values were found between any groups . Failures occurred mainly within the bond ; exclusively adhesive fractures ( adhesive-dentin ) were not observed . CONCLUSION The 2 % chlorhexidine solution , applied before or after acid etching of the dentin , did not interfere with the microtensile bond strength of composite resin to the dentin treated with Prime & Bond NT , Single Bond , or Clearfil SE Bond bonding systems
Conclusions : The application of a 2 % chlorhexidine solution after acid etching increased the microtensile bond strength significantly for follow-up times of 6 months or more .
The adhesive type had no influence
Background and Objectives : The aim of this systematic review was to examine the effect of 2 % chlorhexidine following acid etching on the microtensile bond strength of resin restorations for different follow-up times .