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Effect of GaAlAs low-level laser therapy on mouth opening after orthognathic surgery

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Abstract

To evaluate low-level laser therapy (LLLT) as an adjunct to enhance postoperative mouth opening after orthognathic surgery. Prospective clinical trial of 82 patients allocated into an intervention group (laser, LG) and a control group (no laser, CG) and subgroups according to the procedure type : (1) surgically assisted rapid maxillary expansion (SARME); (2) maxillary surgery; (3) mandibular surgery; or (4) bimaxillary surgery. LG patients received LLLT immediately after surgery and every 24 h thereafter for 3 days, using a gallium–aluminum–arsenide (GaAlAs) diode laser (780 nm, 28 spots, 14 on each side of the face, output power 2 J/spot). Maximum mouth opening was measured using digital calipers at five time points: preoperative baseline and postoperative days 2, 7, 14, and 21. ANOVA was used to evaluate difference in mouth opening across groups. Significance was accepted at P  ≤  0.05. Final average mouth opening differed between women (GL1 = 94.24%, GC1 = 89.54%, GL2 = 69.39%; GC2 = 68.46%; GL3 = 65.11%; GC3 = 58.64%; GL4 = 61.85%; GC4 = 57.11%) and men (GL1 = 86.92%, GC1 = 102.44%, GL2 = 77.56%; GC2 = 81.65%; GL3 = 80.29%; GC3 = 67.63%; GL4 = 66.93%; GC4 = 55.31%). There were no significant differences between the SARME and isolated maxillary/mandibular surgery groups. In the bimaxillary groups, average mouth opening was increased in all patients who received LLLT, significantly so in male patients. LLLT with a GaAlAs diode laser (780 nm) did not affect postoperative mouth opening after SARME, isolated maxillary surgery, or isolated mandibular surgery. However, it improved mouth opening in men who had undergone bimaxillary orthognathic surgery.

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Authors and Affiliations

  1. Department of Clinical Dentistry, Universidade Federal do Espírito Santo (UFES), Vitória, ES, Brazil

    Robson Almeida de Rezende & Daniela Nascimento Silva

  2. Program of Laser Use in Dentistry, Universidade Cruzeiro do Sul, São Paulo, SP, Brazil

    Lúcio Frigo

Authors
  1. Robson Almeida de Rezende
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  2. Daniela Nascimento Silva
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  3. Lúcio Frigo
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Correspondence to Robson Almeida de Rezende.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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de Rezende, R.A., Silva, D.N. & Frigo, L. Effect of GaAlAs low-level laser therapy on mouth opening after orthognathic surgery. Lasers Med Sci 33, 1271–1277 (2018). https://doi.org/10.1007/s10103-018-2477-x

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  • DOI: https://doi.org/10.1007/s10103-018-2477-x

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