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Effect of frequent laser irradiation on orthodontic pain. A single-blind randomized clinical trial.

Kim, Won Tae; Bayome, Mohamed; Park, Jun-Beom; Park, Jae Hyun; Baek, Seung-Hak; Kook, Yoon-Ah.
Angle Orthod; 83(4): 611-6, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23241006

OBJECTIVE:

To analyze the effect of low-level laser therapy (LLLT) on perception of pain after separator placement and compare it with perceptions of control and placebo groups using a frequent irradiation protocol. MATERIALS AND

METHODS:

Eighty-eight patients were randomly allocated to a laser group, a light-emitting diode (LED) placebo group, or a control group. Elastomeric separators were placed on the first molars. In the laser and LED groups, first molars were irradiated for 30 seconds every 12 hours for 1 week using a portable device. Pain was marked on a visual analog scale at predetermined intervals. Repeated measure analysis of variance was performed for statistical analysis.

RESULTS:

The pain scores of the laser group were significantly lower than those of the control group up to 1 day. The pain scores in the LED group were not significantly different from those of the laser group during the first 6 hours. After that point, the pain scores of the LED group were not significantly different from those of the control.

CONCLUSIONS:

Frequent LLLT decreased the perception of pain to a nonsignificant level throughout the week after separator placement, compared with pain perception in the placebo and control groups. Therefore, LLLT might be an effective method of reducing orthodontic pain.