Effect of Proanthocyanidin on the Dentin Bond Strength of Primary Teeth Exposed to Salivary Contamination

Purpose: The aims of this study were to determine (1) how microtensile bond strength (μTBS) is affected by proanthocyanidins (PACs) from an enriched fraction of a grape seed extract (EGSE) when incorporated as a primer in the dentin bonding process and (2) whether EGSE overcomes the deleterious effect of saliva contamination on the resin-dentin bond strength in primary molars. Methods: extracted primary molars were ground to expose sound coronal dentin. The teeth were divided into four groups: (1) Control group, (2) 6.5% EGSE primer prior to adhesive, (3) Contamination with saliva after etching, (4) 6.5% EGSE primer prior to adhesive and contamination with saliva after etching. Samples were sectioned and evaluated for μTBS. Results: The 6.5% EGSE used as a primer before bonding showed no significant difference in μTBS compared to controls in both non-contaminated and contaminated groups (p=0.46). There was a significant difference between control groups and groups with salivary contamination (F (1,201) = 24.321, p< 0.001). There was no difference of saliva-contaminated samples between control and 6.5% GSE treatment (F(1, 201)= 3.380, p=0.07). Conclusions: EGSE did not enhance TBS in composite restorations for primary teeth.