RESULTS No statistical significant difference in bond strength between both categories was observed in caries-affected dentin at immediate evaluation and in sound dentin after ageing .
Etch- and -rinse adhesives , however , performed better in sound enamel and dentin substrates considering immediate bond strength .
None study assessed the long-term adhesive effectiveness to sound or demineralized enamel .
Although the articles included in this meta- analysis showed high heterogeneity and high risk of bias , the in vitro literature suggests superior performance of etch- and -rinse adhesives in primary teeth in comparison with self-etch systems
AIM To systematic ally review the literature for in vitro studies that evaluated the immediate or after ageing bond strength of  etch- and -rinse and self-etch adhesive systems to enamel and dentin of primary teeth .
Shear-bond strength of a new self-adhering flowable restorative material to dentin of primary molars.
OBJECTIVE The aim of this study was to evaluate the shear bond strength to dentin of primary molars of a new self-adhering flowable resin composite with two ionomer-based cements and one flowable resin composite in combination with two different adhesive systems . STUDY DESIGN Fifty primary molars were grinded on the occlusal surface to obtain flat dentin substrate and r and omly divided into 5 groups ( n = 10 ) : OFL : Phosphoric Acid/Optibond FL/Premise Flow ; OAO : Optibond All-In-One/Premise Flowable ; II : Polyacrylic Acid/Fuji II ; IX : Polyacrylic Acid/Fuji IX ; V : Vertise Flow . Cylinders ( 3 mm diameter - 5 mm height ) of restorative material were built-up in three increments over the dentin surfaces . A shear load was applied until failure . Bond strength values were statistically analysed with Kruskall-Wallis ANOVA followed by Dunn 's test ( P < .05 ) . Differences in failure mode distribution were assessed with Chi-square ( P < .05 ) . RESULTS OFL and OAO recorded significantly higher bond strengths than the other groups . Adhesive failures were evident in all groups except OFL and OAO , in which also cohesive failures in dentin were observed . CONCLUSIONS Vertise Flow established on primary dentin bond strengths values similar to those of glass ionomer cements routinely used for restorations of primary teeth . The combination of flowable resin with etch- and -rinse or all-in-one adhesives obtained higher bond strength values , thus involving a more complex h and ling
RESULTS No statistical significant difference in bond strength between both categories was observed in caries-affected dentin at immediate evaluation and in sound dentin after ageing .
Etch- and -rinse adhesives , however , performed better in sound enamel and dentin substrates considering immediate bond strength .
None study assessed the long-term adhesive effectiveness to sound or demineralized enamel .
Although the articles included in this meta- analysis showed high heterogeneity and high risk of bias , the in vitro literature suggests superior performance of etch- and -rinse adhesives in primary teeth in comparison with self-etch systems
AIM To systematic ally review the literature for in vitro studies that evaluated the immediate or after ageing bond strength of  etch- and -rinse and self-etch adhesive systems to enamel and dentin of primary teeth .