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 .
Bond strength of a mild self-etch adhesive with and without prior acid-etching.
UNLABELLED The self-etch approach provides dentists with a generation of user-friendly and less technique-sensitive adhesives . Nevertheless , some concern has been raised regarding their bonding effectiveness to enamel , in particular when so-called ' mild ' self-etch adhesives are employed . OBJECTIVES The purpose of this study was to test the hypothesis that the two-step self-etch adhesive Clearfil SE Bond ( C-SE ; Kuraray , Osaka , Japan ) bonds equally effective to enamel/dentin either with or without prior etching with phosphoric acid . METHODS Bur-cut enamel/dentin surfaces prepared from human molars were partially split in two halves by cutting a shallow groove . One half was first etched with 40 % phosphoric acid ( K-etchant ) , while protecting the other half by holding a razor blade in the groove . Next , C-SE was applied strictly following the manufacturer 's instructions , after which the surface was built up using Z100 ( 3 M Espe ) . After 24-h water storage , micro-specimens were prepared with the interface circularly constricted using a Micro-Specimen Former , prior to micro-tensile bond strength ( MPa ) measurement . In addition , interfaces of C-SE with enamel/dentin prepared with and without beforeh and acid etching were examined by Feg-SEM and TEM . RESULTS Beforeh and etching significantly increased the bonding effectiveness of C-SE to enamel . A clearly more micro-retentive surface was revealed by TEM and Feg-SEM when enamel was etched . Phosphoric-acid etching prior to C-SE application on dentin significantly decreased the muTBS to dentin . TEM provided indications of a low- quality hybrid layer after beforeh and phosphoric-acid etching . CONCLUSION Using C-SE , additional etching with phosphoric acid to improve bonding effectiveness should be limited to 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 .