Effect of newer antioxidants on the bond strength of composite on bleached enamel

Abstract

It can be concluded that the use of antioxidant before bonding procedures on bleached enamel completely neutralizes the deleterious effects of bleaching and increases the bond strength significantly.

Impact of Different Antioxidants on the Bond Strength of Resin-based Composite on Bleached Enamel—An In Vitro Study

“…On comparison of group C with group F significantly higher shear bond strength for Proanthocyanidin was seen. The results were in agreement with previous studies done by Manoharan et al 1 and Vidhya et al 2 this can be due to three reasons that are: • specificity of proanthocyanidin for hydroxyl free radicals. 20 • The superoxide radicals being trapped by the multiple donor sites found on oligomeric proanthocyanidin (OPC).…”

“…8 • The free radical scavenging activity enhanced by the esterification of epicatechin by gallic acid in OPCs. 1 Arumugam et al observed that Sodium ascorbate had a better potential in elevating the bond strength of enamel surface than proanthocyanidin. The probable reasons for disagreement are the different bleaching methodology used.…”

“…Tooth staining is generally unprepossessing and mentally traumatizing. 1 Treatment choices for stained teeth incorporate evacuation of surface stains, bleaching, microabrasion, macro abrasion, veneering (direct or indirect) and application of porcelain crowns. 2,3 Tooth bleaching has been a choice since the late 1870s as it allows a fruitful stylish result at negligible cost while saving the tooth structure.…”

“…The decreased shear bond strength may likewise be owing to change in the microstructure of bleached enamel surfaces subsequent to acid etching including lessening of calcium substance of enamel and diminished microhardness, and loss of enamel prisms. 1 Thinking about this, different techniques were proposed to dodge clinical issues identified with compromised bond strength after bleaching, for example, removal of the shallow layer of enamel, 8 pretreatment of bleached enamel with liquor, use of cement containing natural solvents 9 and use of antioxidants. 10 Among all the strategies mentioned above, the antioxidant treatment has demonstrated a quick change in the effectiveness of bond strength, though alternative techniques indicated clashing outcomes in recapturing the e ffectiveness of bond strength.…”

Effects of Different Whitening agents on the Mechanical Properties of Restorative Materials

“…This technique is clinically relevant and applicable for those patients that require restorative treatment immediately after in-office bleaching techniques [16]. Moreover, use of antioxidant (10% sodium ascorbate gel or 5% proanthocyanidin agent) before bonding procedures on bleached enamel neutralizes completely the deleterious effects of bleaching and significantly increases the bond strength [17].…”