Efficacy of pulsed electromagnetic field in reducing treatment time: A clinical investigation

Am J Orthod Dentofacial Orthop. 2022 May;161(5):652-658. doi: 10.1016/j.ajodo.2020.12.025. Epub 2022 Jan 15.


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.

MeSH terms

  • Bicuspid
  • Cuspid
  • Electromagnetic Fields
  • Humans
  • Magnetic Field Therapy*
  • Orthodontic Wires*
  • Tooth Movement Techniques