Introduction The objective of this two-arm, parallel randomized clinical trial was to assess the effectiveness of low-level light therapy (photobiomodulation) using an intraoral light-emitting diode (LED) device with respect to accelerating premolar extrac- tion space closure during en masse retraction. This trial was conducted between January 2013 and February 2014 at the European Univeristy College Department of Orthodontics. Methods The study included 60 orthodontic patients (age range, 11.3–47.1 years; mean age, 20.4 years) with premolar extrac- tions. Patients (n = 60) were randomized into the photobiomodulation (PBM) group (n = 30) or the control group (n =30). Eligibility criteria included no active caries, good oral hygiene, and an extraction orthodontic treatment plan. Extraction spaces were closed using NiTi closed springs utilizing 150 g of force. Extraction spaces were measured on study models at the beginning of en masse retraction (T1) and at space closure completion (T2). Blinding All measurements were obtained by a single investigator who was blinded to the group allocation of study models. Outcome The primary outcome was the velocity of extraction space closure (mm/month) during the period of en masse retraction. Randomization Treatment allocation was implemented using randomization with 2 major blocks of 30 patients, by
Lasers in Dental Science – Springer Journals
Published: Feb 20, 2018
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