Comparative Evaluation of the Effect of sodium ascorbate on the shear bond strenth of composite resin after laser assisted bleaching using two different wavelenths-An In-Vitro study

Abstract

Introduction: In dental esthetics we strive towards mimicking and customising a restorative treatment which will harmonize with nature. The most common drive for improvement in the smile is due to the discoloration of the teeth. Tracing back, bleaching has been used successfully since its inception. Though there is enormous advancement in the procedures and materials incorporated for the bleaching techniques, the lengthy procedural time and supplemental appointments required are still a daunting problem. To cut through the same, activation of the bleaching agents to allow for a quicker treatment was postulated. Different light sources like halogen curing lights, Plasma arc lamp, Xn–halogen light and Lasers have been used for activation of the bleaching gel.Out of these, diode lasers have gained popularity due to their cost-efficiency and ease of use. Also, bleaching has shown to have a compromised bonding to composite restoration. Antioxidants like sodium ascorbate have been used to reverse the bond strength and have shown promising results.