Abstract
This study evaluated the effect of low-level laser therapy (LLLT) on bone regeneration at the midpalatal suture (MPS) after rapid maxillary expansion (RME), using cone beam computed tomography. Fourteen 8–14-year-old patients with transverse maxillary deficiency underwent RME with a Hyrax-type expander activated with one full turn after installation and two half turn daily activations until achieving overcorrection. Patients were randomly assigned to either a control group (RME alone, n = 4) or an experimental group (n = 10) in which RME was followed by 12 LLLT sessions (GaAlAs, p = 70 mW, λ = 780 nm, Ø = 0.04 cm2). Two tomographic images of the MPS were obtained—T0, after disjunction and T1, after 4 months. Bone regeneration was evaluated by measuring the optical density (OD) on the tomographic images using InVivo Dental 5.0 software. Data were analyzed by the paired Student’s t test (α = 0.05 %). A statistically significant difference between T0 and T1 OD values was observed in the laser-treated group (p = 0.00), but this difference was not significant in the control group (p = 0.20). Intergroup comparison of OD values at T1 revealed higher OD in the laser-treated group (p = 0.05). In conclusion, LLLT had a positive influence on bone regeneration of the midpalatal suture by accelerating the repair process.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This research received approval from the institutional ethics committee of the Federal University of Ceará (protocol #58/12).
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The study purposes were fully explained to the parents/guardians, who signed a written informed consent form authorizing children’s enrolment in the study. Informed consent was obtained from all individual participants included in the study.
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Ferreira, F.N.H., Gondim, J.O., Neto, J.J.S.M. et al. Effects of low-level laser therapy on bone regeneration of the midpalatal suture after rapid maxillary expansion. Lasers Med Sci 31, 907–913 (2016). https://doi.org/10.1007/s10103-016-1933-8
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DOI: https://doi.org/10.1007/s10103-016-1933-8