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 .
Effect of caries removal techniques on the bond strength of adhesives to caries-affected primary dentin in vitro.
AIM The aim of this in vitro study is to evaluate the effects of three different caries removal techniques on the microtensile bond strength of adhesive material s to caries-affected dentin . MATERIAL S AND METHODS Thirty primary molar teeth were used . The teeth were r and omly divided into three groups according to the caries removal technique employed : conventional steel bur ( group 1 ) ; Er : YAG laser ( group 2 ) ; chemomechanical method ( group 3 ) . Each group was divided into two subgroups according to bonding agents : one-step self-etch adhesive and etch- and -rinse adhesive . The teeth were restored with composite resin . Vertical sticks were obtained and subjected to tensile stress . Data were analyzed by two-way analysis of variance ( ANOVA ) , Tukey 's test and an independent sample s t-test . RESULTS The values for the laser groups were significantly lower than those of the bur groups for both bonding agents ( p<0.05 ) . There were no significant differences between the bur and chemomechanical groups ( p > 0.05 ) . CONCLUSION Bur and chemomechanical techniques in primary teeth were found more successful . Similar results were found according to the adhesives used for each caries removal techniques
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 .