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 .
Self-etching adhesive on intact enamel, with and without pre-etching.
OBJECTIVE Bond strengths of composite resin to enamel using self-etch adhesive ( SEA ) Clearfil SE bond system on intact enamel and enamel pre-etched with phosphoric acid were compared . The objective was to determine if the pre-etching would increase the bond strengths of the SEA systems to intact enamel and to evaluate the effect of pre-etching on bond formation of self-etch adhesives on intact enamel . MATERIAL S AND METHOD Labial surfaces of 40 caries free permanent upper central and lateral incisors were cleaned , sectioned of their roots . All specimens were mounted on acrylic block and divided r and omly into four groups . In two groups the application of self-etch adhesive , Clearfil SE bond was carried as per manufacturer 's instructions , composite cylinders were built , whereas in the other two groups , 37 % phosphoric acid etching was done before the application of self-etching adhesives . Then the resin tags were analyzed using scanning electron microscope and shear bond strength was measured using Instron universal testing machine . RESULTS When phosphoric acid was used , there was significant increase in the depth of penetration of resin tags and in the Shear Bond Strength of composite to enamel . CONCLUSION The results indicate that out of both treatment groups , pre-etching the intact enamel with 37 % phosphoric acid result ed in formation of longer resin tags and higher depth of penetration of resin tags of the Clearfil SE bond , and attaining higher bond strength of the Clearfil SE bond to intact enamel
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 .