Abstract
To evaluate the effectiveness low-level laser therapy (LLLT) on the repair of the mid palatal suture, after rapid maxillary expansion (RME). A single-operator, randomized single-blind placebo-controlled study was performed at the Orthodontic Department at the Dental Hospital of Bellvitge. Barcelona University, Hospitalet de Llobregat, Spain. Thirty-nine children (range 6–12 years old), completed RME and were randomized to receive active LLLT (n = 20) or placebo (n = 19). The laser parameters and dose were 660 nm, 100 mW, CW, InGaAlP laser, illuminated area 0.26 cm2, 332 mW/cm2, 60 s to four points along midpalatal suture, and 30 s to a point each side of the suture. A total of seven applications were made on days 1, 7, 14, 28, 42, 56, and 70 of the retention phase RME. A cone beam computed tomography (CBCT) scan was carried out on the day of the first laser treatment, and at day 75, a second CBCT scan was performed. Two radiologists synchronized the slices of two scans to be assessed. P = 0.05 was considered to be statistically significant. At day 75 of the suture, the irradiated patients presented a greater percentage of approximate zones in the anterior (p = 0.008) and posterior (p = 0.001) superior suture—and less approximation in the posterior superior suture (p = 0.040)—than the placebo group. LLLT appears to stimulate the repair process during retention phase after RME.
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Acknowledgments
We would like to thank all the subjects who volunteered for this study, Christopher Showers for providing help with proofreading the article, and Sara Calvo for help with biostatistics. This trial was supported by the Dental Hospital of Bellvitge, Barcelona University, Spain.
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Garcia, V.J., Arnabat, J., Comesaña, R. et al. Effect of low-level laser therapy after rapid maxillary expansion: a clinical investigation. Lasers Med Sci 31, 1185–1194 (2016). https://doi.org/10.1007/s10103-016-1970-3
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DOI: https://doi.org/10.1007/s10103-016-1970-3