Title: Effect of 940 nm Diode Laser Irradiation Prior to Bonding Procedure on Postoperative Sensitivity Following Class II Composite Restorations

Biography:

Mina Jazaerijouneghani has completed his DDS from Mashhad University and MS in Oral Medicine from Hamadan University of medical Sciences. She is the editor in cheif of Avecinna Journal of Dental research. She has been a staff of school of dentistry since 2011 till now.

Abstract

This study aimed to assess the efficacy of 940 nm diode laser irradiation prior to the bonding procedure for reduction of postoperative sensitivity (POS) following the class II composite restorations. This double-blind clinical trial evaluated 30 patients with bilateral premolars with mesio-occlusal or disto-occlusal carious lesions. In each patient, the teeth were randomly assigned to the laser and control groups. After cavity preparation and isolation and prior to the bonding procedure in the laser group, 940 nm diode laser was irradiated in continuous wave mode with 100 mW power and 4 J/cm2 energy density. In the control group, irradiation was performed using the aiming beam. The cavities were then restored with composite resin. Sensitivity to cold was assessed at baseline (before the intervention) and at 1, 14 and 30 days after the restoration using a visual analog scale (VAS).The mean VAS score significantly decreased in both groups of laser and control at all time points compared to baseline (p<0.05). The mean VAS score was not significantly different between the laser and control groups at baseline and 1st day (p>0.05) but the mean VAS score in the laser group was significantly lower than that in the control group at 14 and 30 days (p<0.05). As a conclusion, the results showed that irradiation of diode laser with 940 nm wavelength prior to the bonding procedure and class II composite restoration can significantly decrease the POS at 14 and 30 days compared with the control group. Diode laser irradiation at 940 nm wavelength prior to the bonding procedure and class II composite restoration can serve as an effective modality to decrease POS in short-term.