Soft laser irradiation effects on pain reduction in orthodontic treatment.

The effects of soft laser (low reactive level laser) on reduction of pain while undergoing orthodontic treatment was examined in this study. These patients were randomly separated into 3 groups: non-treated control group (CG), blind irradiation group (BG), and laser irradiated group (LG). The effect of laser irradiation on reduction in pain was analyzed by a questionnaire given to patients who had been wired with an edgewise appliance of a multi-bracket system for orthodontic therapy. Just after application of the initial wire, LG patients were irradiated with the soft laser from the labial and lingual sites for a total of one minute. Reduction in pain was found in some patients who had been irradiated. In particularly, delay in the pain appearance was noted as compared to the other two control groups.