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Analgesic effect of a low-level laser therapy (830 nm) in early orthodontic treatment

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Abstract

The aim of this study was to evaluate the pain sensation that orthodontic patients experience when elastic separators are placed between molars and premolars and to determine the degree of analgesic efficacy of low-level laser therapy (LLLT) compared to a placebo treatment. The study was conducted with 20 volunteers who were fitted with elastic separators between the maxillary molars and premolars. One quadrant was randomly chosen to be irradiated with an 830-nm laser, 100 mW, beam diameter of 7 mm, 250 mW/cm2 applied for 20 s per point (5 J/cm2). Three points were irradiated in the buccal face and three were irradiated in the palate. The same procedure was applied in the contralateral quadrant with a placebo light. A visual analogue scale was used to assess pain 5 min, 6 h, 24 h, 48 h, and 72 h after placement of the separators. Maximum pain occurred 6–24 h after placement of the elastic separators. Pain intensity was significantly lower in the laser-treated quadrant (mean, 7.7 mm) than in the placebo-treated quadrant (mean, 14.14 mm; p = 0.0001). LLLT at these parameters can reduce pain in patients following placement of orthodontic rubber separators.

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Authors and Affiliations

  1. Dental School, International University of Catalunya, Campus Sant Cugat, Josep Trueta s/n, 08195—St. Cugat del Vallès, Barcelona, Spain

    M. Artés-Ribas

  2. Laser Dentistry Master Program, European Program EMDOLA, University of Barcelona, Barcelona, Spain

    J. Arnabat-Dominguez

  3. Department of Orthodontics and Dentofacial Orthopedics, Dental School, International University of Catalunya, Campus Sant Cugat, Josep Trueta s/n, 08195—St. Cugat del Vallès, Barcelona, Spain

    A. Puigdollers

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  1. M. Artés-Ribas
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  2. J. Arnabat-Dominguez
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  3. A. Puigdollers
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Artés-Ribas, M., Arnabat-Dominguez, J. & Puigdollers, A. Analgesic effect of a low-level laser therapy (830 nm) in early orthodontic treatment. Lasers Med Sci 28, 335–341 (2013). https://doi.org/10.1007/s10103-012-1135-y

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  • DOI: https://doi.org/10.1007/s10103-012-1135-y

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