However , for the ultra-mild All-Bond Universal adhesive , the etch- and -rinse strategy was significantly different than the self-etch mode in terms of dentin micro-tensile bond strength , as well as in the global analysis of enamel micro-tensile and micro-shear bond strength ( p≤0.05 ) .
The enamel bond strength of universal adhesives is improved with prior phosphoric acid etching .
However , this effect was not evident for dentin with the use of mild universal adhesives with the etch- and -rinse strategy .
CLINICAL SIGNIFICANCE Selective enamel etching prior to the application of a mild universal adhesive is an advisable strategy for optimizing bonding
OBJECTIVES A systematic review was conducted to determine whether the etch- and -rinse or self-etching mode is the best protocol for dentin and enamel adhesion by universal adhesives .
Performance of a new one-step multi-mode adhesive on etched vs non-etched enamel on bond strength and interfacial morphology.
PURPOSE To compare microtensile bond strength ( μTBS ) and interfacial morphology of a new one-step multimode adhesive with a two-step self-etching adhesive and two etch- and -rinse adhesives systems on enamel . MATERIAL S AND METHODS Thirty human third molars were sectioned to obtain two enamel fragments . For μTBS , 48 enamel surfaces were ground using 600-grit SiC paper and r and omly assigned into 6 groups ( n = 8) : nonetched Scotchbond Universal [ SBU ] ; etched SBU [ SBU-et ] ; non-etched Clearfil SE Bond [ CSE ] ; etched CSE [ CSE-et ] ; Scotchbond Multi- PURPOSE [ SBMP ] ; Excite [ EX ] . The etched specimens were conditioned with 37 % phosphoric acid for 30 s , each adhesive system was applied according to manufacturers ' instructions , and composite resin blocks ( Filtek Supreme Plus , 3 M ESPE ) were incrementally built up . Specimens were sectioned into beams with a cross-sectional area of 0.8-mm2 and tested under tension ( 1 mm/min ) . The data were analyzed with oneway ANOVA and Fisher 's PLSD ( α = 0.05 ) . For interface analysis , two sample s from each group were embedded in epoxy resin , polished , and then observed using scanning electron microscopy ( SEM ) . RESULTS The μTBS values ( in MPa ) and the st and ard deviations were : SBU = 27.4 ( 8.5 ) ; SBU-et = 33.6 ( 9.3 ) ; CSE = 28.5 ( 8.3 ) ; CSE-et = 34.2 ( 9.0 ) ; SBMP = 30.4 ( 11.0 ) ; EX = 23.3 ( 8.2 ) . CSE-et and SBU-et presented the highest bond strength values , followed by SBMP , CSE , and SBU which did not differ significantly from each other . EX showed the statistically significantly lowest bond strength values . SEM images of interfaces from etched sample s showed long adhesive-resin tags penetrating into demineralized enamel . CONCLUSIONS Preliminary etching of enamel significantly increased bond strength for the new one-step multimode adhesive SBU and two-step self-etching adhesive CSE
However , for the ultra-mild All-Bond Universal adhesive , the etch- and -rinse strategy was significantly different than the self-etch mode in terms of dentin micro-tensile bond strength , as well as in the global analysis of enamel micro-tensile and micro-shear bond strength ( p≤0.05 ) .
The enamel bond strength of universal adhesives is improved with prior phosphoric acid etching .
However , this effect was not evident for dentin with the use of mild universal adhesives with the etch- and -rinse strategy .
CLINICAL SIGNIFICANCE Selective enamel etching prior to the application of a mild universal adhesive is an advisable strategy for optimizing bonding
OBJECTIVES A systematic review was conducted to determine whether the etch- and -rinse or self-etching mode is the best protocol for dentin and enamel adhesion by universal adhesives .