Effect of grape seed extracts on bond strength of bleached enamel using fifth and seventh generation bonding agents

The objective of this in-vitro study was to evaluate the effect of grape seed extract (oligomericproanthocyanidin complexes [OPCs]) on the bond strength of composite resin to bleached enamel using 5th and 7th generations of bonding agents.

Eighty maxillary central incisors were randomly assigned to four groups as follows: Group I (n=20): no bleaching (control); Group II (n=20): bleaching with 38% hydrogen peroxide gel, without the use of an antioxidant; Group III (n=20): bleaching followed by the use of 10% sodium ascorbate; Group IV (n=20) : bleaching followed by the use of 5% proanthocyanidin solution. All the four groups were further subdivided into two groups of ten teeth each depending on the adhesive system used in order to bond the resin composite to enamel surfaces. Subgroup A: 5th generation bonding agent and subgroup B : 7th generation bonding agent. Shear bond strength of the specimens was tested under universal testing machine.

The shear bond strength values were observed to be significantly higher in teeth treated with 10% sodium ascorbate and 5% proanthocyanidin as compared to the group in which no antioxidant was used. Also, bonding with 5th generation bonding agent resulted in significantly higher shear bond strength when compared to the 7th generation bonding agent.

The use of grape seed extract as an antioxidant after bleaching significantly improves the bond strength of composite resin to bleached enamel. 5th generation bonding agents have higher shear bond strength of composite resin to enamel. How to cite this article: Abraham S, Ghonmode WN, Saujanya KP, Jaju N, Tambe VH, Yawalikar PP. Effect of grape seed extract on bond strength of bleached enamel using fifth and seventh generation bonding agents. J Int Oral Health 2013; 5(6):101-7 .