AIM: This study evaluated the simultaneous effect of extended etching time and casein phosphopeptide-amorphous @entity78 (CPP-ACP) containing paste application on shear bond strength (SBS) of etch-and-rinse adhesive to @entity1547 ( @entity1547 ). MATERIALS AND METHODS: Fifty @entity1 third molars were used; 10 normal in group 1 and 40 caries-affected teeth in groups 2 to 5. In the @entity1547 groups, teeth were randomly assigned into four groups (n = 10). In groups 2 and 4, @entity8718 etching for 15 and 45 seconds was used and in groups 3 and 5, after 15 or 45 seconds etching respectively, CPP-ACP containing paste (MI paste) was applied for 3 minutes. After rinsing, single bond adhesive system and Z250 composite were used for resin composite build-up in all groups. After storage, SBS test was measured at cross head speed of 0.5 mm/min. Data were analyzed using one/two-way ANOVA and Tukey HSD test (a = 0.05). RESULTS: Normal dentin groups showed the highest SBS among different groups. There was a statistically significant difference between different etching times in @entity1547 groups (p < 0.05), but there were no significant differences between SBS of SB adhesive to @entity1547 with or without CPP-ACP pretreated in both etching times. Most of the failure modes were adhesive except in groups 1 and 5 which cohesive failure in composite was also observed. CONCLUSION: The results of our study indicated that extended etching time up to 45 seconds could enhance the SBS of @entity1547 and approach nearly to SBS of normal dentin. Moreover, MI paste pretreatment had not significant effect on SBS of etch-and-rinse adhesive in @entity1547 . CLINICAL SIGNIFICANCE: Simultaneous application of extended etching time and CPP-ACP containing paste may be a suggested method in increasing the SBS of adhesive to @entity1547 .

The Simultaneous Effect of Extended Etching Time and Casein Phosphopeptide-Amorphous XXXX containing Paste Application on Shear Bond Strength of Etch-and-rinse Adhesive to Caries-affected Dentin.

@entity1 :: ('9606', 'Species') :: ['human'] @entity8718 :: ('MESH:C030242', 'Chemical') :: ['phosphoric acid'] @entity78 :: ('MESH:C020243', 'Chemical') :: ['calcium phosphate'] @entity1547 :: ('MESH:D003731', 'Disease') :: ['caries-affected-dentin', 'CAD']
@entity78 :: (MESH:C020243,Chemical) :: ['Calcium Phosphate']
