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Purpose <p>Orthodontic procedures often cause pain, which can affect patient compliance and treatment outcomes. Low-level laser therapy (LLLT) has been explored as a non-invasive method to alleviate orthodontic pain. This study evaluated the effect of LLLT on pain perception during the initial phase of canine retraction following premolar extraction.</p> Materials and methods <p>This randomized, split-mouth study included 30 patients aged between 14 and 21 years, all of whom were undergoing fixed orthodontic treatment and required canine retraction following the removal of their first premolars. Each patient had one side of their upper or lower dental arch treated with the laser (exposed group), while the other side served as a control (placebo group). After placing and activating the lacebacks for canine retraction, the experimental side was treated immediately with a gallium-aluminum-arsenide (GaAlAs) diode laser, with a wavelength of 810 + 15&#xa0;nm. To measure pain, each patient received a questionnaire with two sections- one for each side of the mouth. They were asked to rate their pain using a Visual Analogue Scale (VAS) immediately after activation of lacebacks and laser treatment, and then once every 24&#xa0;h over the next seven days.</p> Results <p>The results showed a significant reduction in pain levels in the laser-treated group (EG) starting from Day 1 and continuing through Days 3, 4, 5, 6, and 7 (<i>p</i> &lt; 0.05). In contrast, the placebo group (PG) didn’t show a noticeable decrease in pain until Day 4, and the decline was slower overall. This suggests that LLLT helped patients feel better sooner and more consistently compared to no treatment.</p> Conclusion <p>LLLT demonstrated a significant reduction in pain intensity and duration during the initial phase of canine retraction, enabling faster relief compared to the placebo side. While it did not alter the onset of pain, its use proved effective in accelerating discomfort resolution, suggesting its value as a supportive, non-invasive adjunct in orthodontic pain management.</p>

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Effectiveness of low-level laser therapy for pain management during initial canine retraction: a split-mouth study

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • Isha Bokare,
  • Vivek Amin,
  • Dilshad Umar,
  • Sandeep Shetty

摘要

Purpose

Orthodontic procedures often cause pain, which can affect patient compliance and treatment outcomes. Low-level laser therapy (LLLT) has been explored as a non-invasive method to alleviate orthodontic pain. This study evaluated the effect of LLLT on pain perception during the initial phase of canine retraction following premolar extraction.

Materials and methods

This randomized, split-mouth study included 30 patients aged between 14 and 21 years, all of whom were undergoing fixed orthodontic treatment and required canine retraction following the removal of their first premolars. Each patient had one side of their upper or lower dental arch treated with the laser (exposed group), while the other side served as a control (placebo group). After placing and activating the lacebacks for canine retraction, the experimental side was treated immediately with a gallium-aluminum-arsenide (GaAlAs) diode laser, with a wavelength of 810 + 15 nm. To measure pain, each patient received a questionnaire with two sections- one for each side of the mouth. They were asked to rate their pain using a Visual Analogue Scale (VAS) immediately after activation of lacebacks and laser treatment, and then once every 24 h over the next seven days.

Results

The results showed a significant reduction in pain levels in the laser-treated group (EG) starting from Day 1 and continuing through Days 3, 4, 5, 6, and 7 (p < 0.05). In contrast, the placebo group (PG) didn’t show a noticeable decrease in pain until Day 4, and the decline was slower overall. This suggests that LLLT helped patients feel better sooner and more consistently compared to no treatment.

Conclusion

LLLT demonstrated a significant reduction in pain intensity and duration during the initial phase of canine retraction, enabling faster relief compared to the placebo side. While it did not alter the onset of pain, its use proved effective in accelerating discomfort resolution, suggesting its value as a supportive, non-invasive adjunct in orthodontic pain management.