Effect of low-level laser therapy on orthodontic pain caused by canine retraction force

Abstract

Introduction: The purpose of this study was to determine the effect of low-level laser therapy on orthodontic pain after the first canine retraction force.
 Method: This single-blind split-mouth placebo-controlled randomized clinical trial was performed in 30 orthodontic patients requiring bilateral canine retraction in Shahed University. Once canine retraction was initiated, a single dose of diode laser radiation (660 nm, 80 MW, and 3.8 J/cm2 density, diameter of the optical fiber tip: 0/45cm2) was administered to a randomly selected maxillary or mandibular quarter for 30 s. The other quarter served as the placebo side and was treated using the same device without turning on the laser. On the first, second, fourth, and seventh days, the patients rated the pain they experienced on each side at home by using visual analog scale-based questionnaires. Changes in pain were analyzed using non-parametric analysiswith SPSS software.
 Results: In patients who experienced pain,a significant pain reduction was notedon the first and fourth days after low-level laser therapy on the experimental side compared to that on the placebo side (P <0.05).
 Conclusions: A single dose of diodelaser therapy (660nm)can be an efficient modality to reduce the orthodontic pain associated with canine retraction

Assessment of Pain Sensation and Release of RANKL In Gingival Crevicular Fluid Accompanying Laser Application In Orthodontic Treatment: A Randomized Controlled Clinical Trial

“…The current study showed that there was no statistically significant difference between median pain scores in the two sides at all follow up periods. This result comply with one study that showed that the laser had no effect on pain relief ( 5) .…”

“…The present study was performed on canine retraction to localize the pain at this area and thus reducing the measuring error in reporting pain. Moreover, the previous studies were few and yielded controversial findings (4,5) .…”

“…2 is usually used in various dental fields. This laser has shown positive effects on soft tissues and bone, including faster and better osseous remodeling, better tissue repair, disinfection of the dental canal, better and faster osseointegration in dental implants and pain reduction (5,33,3) .…”

“…The VAS questionnaire is thought to be reliable, sensible, repeatable, and understandable by patients. Moreover, it is both practical and easy to use and was utilized for this study (5,20) . Therefore, almost all studies in this field use this specific questionnaire (20) .…”

“…According to a recent study that looked at the effect of low-intensity laser therapy on orthodontic pain caused by the force of canine retraction, a single dosage of diode laser therapy (660nm) can be an effective method for decreasing the orthodontic discomfort caused by canine retraction force (5) .…”