Comparative evaluation of different laser modalities on post endodontic pain in single visit root canal treatment: A randomized controlled trial

Background: Postendodontic pain (PEP) is defined as pain of any degree that occurs after initiation of root canal treatment (RCT). The development of postoperative pain is usually due to acute inflammatory response in the periradicular tissues. Aim: The aim of the study was to evaluate and compare the influence of different laser modalities on PEP following a single-visit RCT. Materials and Methods: Thirty-six patients were divided into three Groups (36 = 12 × 3), Group 1, Control (Placebo); Group 2, Canal Disinfection; and Group 3, Periapical Biostimulation. A questionnaire was given at the end of the appointment to be filled at 6, 12, 24, and 48 hours using visual analog scale. Results: Group 2 (Canal Disinfection) showed minimum PEP with a mean pain score (0.08) at the end of 48 hours which was statistically significant (P Conclusion: Laser stimulation had a positive effect on PEP. Minimum PEP was seen in patients in which lasers were used for Canal Disinfection which was better than Periapical Biostimulation. However, it was found to be statistically not significant.