Effect of proanthocyanidin incorporation into dental adhesive on durability of resin-dentin bond

Abstract

Background Proanthocyanidin has shown to have beneficial effects on dentin bonding via its collagen cross-linking and protease inhibitory effects. Objective This study evaluated the effect of incorporation of 1-3% PA into a dental adhesive on durability of resin-dentin bond. Materials and methods The experimental adhesive was first formulated by combining 50 wt% comonomer mixtures with 50 wt% ethanol. PA was then added to the ethanol-solvated adhesive to yield three groups of adhesives at concentrations of 1.0 wt%, 2.0 wt% and 3.0 wt%. The PA-free adhesive served as control. Flat dentin surfaces from forty extracted third molars were etched with 32% phosphoric acid and the specimens were ran..