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 .
In Vivo and In Vitro Effects of Chlorhexidine Pretreatment on Immediate and Aged Dentin Bond Strengths.
This study evaluated the effect of 2 % chlorhexidine ( CHX ) pretreatment of dentin on the immediate and aged microtensile bond strength ( μTBS ) of different adhesives to dentin in vivo and in vitro . Class I cavities were prepared in 80 caries-free human third molars of 40 patients in a split-mouth fashion . In each tooth pair , one tooth received 2 % CHX pretreatment after which both teeth were r and omly assigned to one of the following groups with respect to the type of adhesive system applied : Adper Single Bond 2 ( etch- and -rinse ) , Clearfil SE Bond ( two-step self-etch ) , Clearfil S(3 ) Bond ( one-step self-etch ) , and Adper Prompt-L-Pop ( all-in-one self-etch ) . The teeth were restored with resin composite and extracted for μTBS testing either immediately or after six months in function . In vitro specimen pairs were prepared as with the clinical protocol in intact , freshly extracted human molars , and thereafter , subjected to testing immediately or after 5000 × thermocycling . Data were analyzed with four-way analysis of variance ( ANOVA ) . Bonferroni test was utilized for pair-wise comparisons . The immediate bond strength values were significantly higher than " aged " ones for all tested adhesives ( p=0.00 ) . The in vitro immediate bond strength values were statistically higher than in vivo bond strength values ( p<0.05 ) . While the bond strength of in vitro aged , CHX-treated sample s were higher than their in vivo counterparts ( p<0.05 ) , no difference was observed in non-CHX treated groups ( p>0.05 ) . In the absence of CHX pretreatment , all adhesives showed significantly higher immediate bond strength values than CHX-treated groups , while all " aged " , non-pretreated adhesives exhibited significantly lower bond strength values ( both p<0.05 ) . By contrast , chlorhexidine pretreatment result ed in significantly higher aged bond strengths , regardless of the adhesive system and testing condition . Aging-associated decline in dentin bond strength of etch- and rinse and self-etch adhesives can be counteracted by chlorhexidine application
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 .