Evaluation of photobiomodulation as a pain prevention alternative in orthodontic movement after installation of orthodontic appliances: randomized clinical study

Introduction: Photobiomodulation is a promising technique for pain management, whether local and/or systemic, due to the beneficial effects generated by the application of laser. Objective: To evaluate the clinical application of intravascular laser irradiation of blood (ILIB) and photobiomodulation (PBM-T), as a predictor of improvements and/or pain prevention and compare its effectiveness when combinated or not. Methods: The present study was carried out with 71 patients, selected according to the inclusion and exclusion criteria and randomly divided into 4 groups regarding the laser application procedure, namely: control group, PBMT, ILIB and PBMT + LIB. All patients were instructed and should fill out questionnaires regarding quality of life parameters and VAS scales and the Facial Pain Scale (EFD) after the procedure. Results: It was observed in the initial evaluation, a difference (p<0.001) regarding the limitation of food and pain when chewing, "sensitivity" in the experimental groups, as well as the values obtained for the variables EFD and VAS were different from the control group. . The statistical difference in the experimental groups was maintained in the evaluation time of 24h, (p<0.001) regarding the variables, between the groups. And in the evaluation time of 3 days, lower values were observed, being similar between the groups only in the evaluation of 7 days. Conclusion: It can be concluded that photobiomodulation is an effective option for pain prevention. Regarding their use, when compared in isolation, PBMT and ILIB present similar results, and when associated, the techniques have a greater analgesic and pain prevention effect when compared to the other groups.