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Low-Level Laser Action on Orthodontically Induced Root Resorption: Histological and Histomorphometric Evaluation
Eliziane Cossetin Vasconcelos1, Jose Fernando Castanha Henriques2, Marinês Vieira Silva Sousa2
1Federal University of Sergipe, Aracaju - SE, Brazil.
Journal of Lasers in Medical Sciences
|February 2, 2017
Summary
This study found that low-level laser (LLL) therapy, using specific parameters, did not significantly reduce root resorption during orthodontic tooth movement in rats. However, the laser treatment did not cause any adverse root surface changes.
Area of Science:
- Biomedical Engineering
- Dental Research
- Regenerative Medicine
Background:
- Orthodontically induced root resorption is a common side effect of orthodontic treatment.
- Phototherapy, particularly low-level laser (LLL) therapy, has shown anti-inflammatory properties.
- The inflammatory process is implicated in the pathogenesis of root resorption.
Purpose of the Study:
- To evaluate the efficacy of a specific low-level laser (LLL) dosimetry in preventing or reducing orthodontically induced root resorption.
- To assess whether LLL therapy impacts root surface alterations during orthodontic tooth movement.
Main Methods:
- Wistar rats underwent controlled orthodontic tooth movement using a super-elastic spring.
- Phototherapy was administered using a diode laser (808 nm) at specified energy levels and frequencies.
- Histological and histomorphometric analyses were performed to quantify root resorption and surface changes.
Main Results:
- No statistically significant difference in root resorption was observed between LLL-treated and control groups when assessed at the same time points (7 or 10 days).
- Differences in root resorption were noted between groups with different durations of orthodontic movement.
- The studied LLL dosimetry did not induce any observable root surface alterations.
Conclusions:
- The specific low-level laser (LLL) dosimetry evaluated in this study is not clinically recommended for preventing or reducing inflammatory root resorption.
- The applied LLL therapy did not negatively affect root surfaces, suggesting a potential for safety in other contexts.
