title: Decrowding of lower anterior segment with and without photobiomodulation: a single center, randomized clinical trial.
abstract: The aim of this study was to evaluate the effect of low-level light therapy using light-emitting diodes (LEDs) on the speed of tooth movements that were required for the leveling and aligning of the lower anterior segment during non-extraction orthodontic treatment. The sample was comprised of patients (n = 40) with lower anterior crowding who were treated with self-ligating orthodontic brackets and a standardized wire sequence. A test group of patients (n = 20) who were treated with extraoral infrared light therapy for 20 min daily with at least 80 % compliance was compared to a control group (n = 20). The date of the first arch wire placement was recorded as T1, and the date of the completion of the lower anterior segment decrowding was recorded as T2. A final impression was also taken at T2. The time between T1 and T2 was significantly reduced by 22 % in the test group compared to the control group (68.3 vs. 87.8 days, respectively, p < 0.043). The use of photobiomodulation for 20 min daily at a wavelength of 850 nm might reduce the time required to resolve lower anterior crowding. This trial and its protocol were not registered on a publicly accessible registry.
authors.affiliation: Levantine Dental Clinic , SZR, Alsafa 1, SMJ1 Bldg, Office 106, PO Box 36873, Dubai, United Arab Emirates.
authors.forename: Amer Z
authors.initials: AZ
authors.lastname: Nahas
authors.affiliation: Levantine Dental Clinic , SZR, Alsafa 1, SMJ1 Bldg, Office 106, PO Box 36873, Dubai, United Arab Emirates. Saed_86s@hotmail.com.
authors.forename: Said A
authors.initials: SA
authors.lastname: Samara
authors.affiliation: Department of Orthodontics, European University College, Dubai Healthcare City, Block D, Bldg 27, Office 302, PO Box 53382, Dubai, United Arab Emirates.
authors.forename: Tannaz A
authors.initials: TA
authors.lastname: Rastegar-Lari
mesh_terms: D016022:Case-Control Studies; D006801:Humans; D028022:Low-Level Light Therapy; D008310:Malocclusion / Q000532:radiotherapy*; D016910:Orthodontic Brackets; D009969:Orthodontic Wires; D055815:Young Adult
keywords: Accelerated tooth movement; Faster tooth movement; Leveling and aligning; Light-emitting diode (LED); Low-intensity laser therapy (LILT); Self-ligating brackets