Introduction: The long duration of orthodontic treatment is a major concern for the patient. This study aimed to evaluate the efficacy of pulsed electromagnetic field therapy (PEMF) in accelerating the orthodontic tooth movement, thus reducing treatment duration.
Methods: Nineteen patients requiring extraction of first premolars were selected for this study. The study design was randomly assigned (sealed envelope randomization) split-mouth design. The rate of individual canine retraction by a nickel-titanium closed-coil spring was done. The experimental side received a PEMF generated by a circuit powered by a watch battery. The circuit was embedded in a removable appliance. Foil was used to obstruct the control side from PEMF exposure. Patients were instructed to wear the appliance for 8-10 hours. Appliance with the device was given from the commencement of canine retraction until the canine retraction of one side was complete. Tooth movement was measured on progress models.
Results: An average increase of 31% in the rate of tooth movement was observed with the PEMF.
Conclusions: PEMF is a good option to reduce orthodontic treatment duration.
Copyright © 2021. Published by Elsevier Inc.
PubMed link: https://pubmed.ncbi.nlm.nih.gov/35039203/
From the American Journal of Orthodontics and Dentofacial Orthopedics: https://www.ajodo.org/article/S0889-5406(21)00795-2/fulltext