Low-level laser therapy (830 nm) on orthodontic pain: blinded randomized clinical trial

Abstract

The objective of this research was to compare the effect single low-level laser therapy (LLLT) irradiation on pain perception in patients having fixed appliance treatment in the clinic of orthodontics. Sixty-two patients were recruited to participate in this randomized, double-blinded, placebo-controlled study. The patients were assigned to four groups: group I-laser on the right side; group II-placebo on the right side; group III-laser on the left side; group IV-placebo on the left. The laser or placebo was applied before separation, 24 and 48 h after separation of their first permanent molars in the lower arch. Just after the separation, the average of the pain for the placebo group was 1.6, significantly greater than the average of 1.1 registered for the laser group (p = 0.013). After 24 h and before the new irradiation, the values registered among the different groups did not show any differences. In relation to the gender, only after the first irradiation in placebo group, the female had a level of pain (0.1) significantly higher (p = 0.04) compared to male, and after 48 h, the group where the laser was applied had a difference (p = 0.04) among the gender with a value of lower pain for men (0.6) than for women (1.6).The laser irradiation to minimize the pain was only effective when applied immediately after treatment and separation. In general way, there were no differences between the genders, except after the first placebo group irradiation in which the female had a significantly higher level of pain compared to male and after 48 h. The pain cycle observed in this study had its peak in 24 h, both for laser's and placebo's group.

Photobiomodulation and Pain Reduction in Patients Requiring Orthodontic Band Application: Randomized Clinical Trial

“…Controversial evidence has been also reported for the PBM effect on the pain cycle. Indeed, although several studies, in line with the present one, failed to report a PBM-induced modulation of the typical pain time course [40,50], other evidence reported opposite results, suggesting that PBM might be able to shift forward the peak time [49,51] and anticipate the end of pain [41,52]. It is important to note that such discrepant results might be related to the great variation in study designs and laser parameters among previous researches.…”

“…Indeed, metal band insertion, especially in the case of tight dental contacts, might lead to pressure sensation, bite sensitivity, and pain to banded teeth [38,39], due to interproximal space expansion and associated orthodontic force application. Moreover, pain during orthodontic treatment usually starts two hours after the application of orthodontic force, reaches a peak level at 24 hours, and lasts approximately five days [8,38,40,41]. In this regard, the present study also assessed whether PBM might modulate the typical temporal course of orthodontic pain.…”

Systematic Review of Orthodontic Treatment Management with Photobiomodulation Therapy

“…[14][15][16][17][18][19][20] Additionally, some articles are included, which satisfy the inclusion criteria, but demonstrate either a null outcome or a result that failed to achieve statistical significance. 21,22 PBMT: accelerated rates of tooth movement PubMed was used to identify randomized, controlled clinical trials during the past 5 years; published articles provide a positive relationship between PBMT and expedited/accelerated tooth movement during appliance therapy. [23][24][25][26] Keywords used were photobiomodulation, low-level laser therapy, ''lowlevel light therapy,'' orthodontics, tooth movement, and randomized clinical trial ‡5 years.…”

The Efficacy of Laser Therapy and Ibuprofen on Pain After Elastomeric Separator Placement: Rapid Review

“…5, [13][14][15] Laser, a highly popular technological application in recent times, is also being used as an alternative to reduce pain without affecting tooth movement. 8,16 Laser is thought to control pain by hyperpolarization of the nerve cell membrane, which increases the patient's pain threshold. 16 The aim of this rapid review was to determine the efficacy of laser therapy and ibuprofen for pain management after elastomeric separator placement in orthodontic treatment.…”

“…8,16 Laser is thought to control pain by hyperpolarization of the nerve cell membrane, which increases the patient's pain threshold. 16 The aim of this rapid review was to determine the efficacy of laser therapy and ibuprofen for pain management after elastomeric separator placement in orthodontic treatment.…”