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document
Effect of adhesive system type and tooth region on the bond strength to dentin . PURPOSE This study evaluated the bond strength of two etch-and-rinse adhesive systems ( two- and three-step ) and a self-etching system to coronal and root canal dentin . MATERIALS AND METHODS The root canals of 30 human incisors and canines were instrumented and prepared with burs . The posts used for luting were duplicated with dual resin cement ( Duo-link ) inside Aestheti Plus # 2 molds . Thus , three groups were formed ( n = 10 ) according to the adhesive system employed : All-Bond 2 ( TE3 ) + resin cement post ( rcp ) + Duo-link ( Dl ) ; One-Step Plus ( TE2 ) + rcp + Dl ; Tyrian/One-Step Plus ( SE ) + rcp + Dl . Afterwards , 8 transverse sections ( 1.5 mm ) were cut from 4 mm above the CEJ up to 4 mm short of the root canal apex , comprising coronal and root canal dentin . The sections were submitted to push-out testing in a universal testing machine EMIC ( 1 mm/min ) . Bond strength data were analyzed with two-way repeated measures ANOVA and Tukey 's test ( p < 0.05 ) . RESULTS The relationship between the adhesives was not the same in the different regions ( p < 0.05 ) . Comparison of the means achieved with the adhesives in each region ( Tukey ; p < 0.05 ) revealed that TE3 ( mean +/- standard deviation : 5.22 +/- 1.70 ) was higher than TE2 ( 2.60 +/- 1.74 ) and SE ( 1.68 +/- 1.85 ) . CONCLUSION Under the experimental conditions , better bonding to dentin was achieved using the three-step etch-and-rinse system , especially in the coronal region . Therefore , the traditional etch-and-rinse three-step adhesive system seems to be the best choice for teeth needing adhesive endodontic restorations .
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Intervention_Physical
etch-and-rinse adhesive systems
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Intervention_Physical
and a self-etching system
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Intervention_Physical
posts used for luting were duplicated with dual resin cement ( Duo-link ) inside Aestheti Plus # 2 molds
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Intervention_Other
All-Bond 2 ( TE3 ) + resin cement post ( rcp ) + Duo-link ( Dl )
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Intervention_Other
One-Step Plus ( TE2 ) + rcp + Dl ; Tyrian/One-Step Plus ( SE ) + rcp + Dl
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Outcome_Physical
coronal and root canal dentin
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Outcome_Other
Bond strength data
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Outcome_Other
two-way repeated measures ANOVA and Tukey 's test
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Outcome_Other
relationship between the adhesives
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Participant_Condition
root canals
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Participant_Sample-size
30