Electric toothbrushes induce electric current in fixed dental appliances by creating magnetic fields

Takashi KAMEDA; Kazuo OHKUMA; Nozomu ISHII; Natsuki SANO; Hideo OGURA; Kazuto TERADA

doi:10.4012/dmj.2012-129

Original Paper

Electric toothbrushes induce electric current in fixed dental appliances by creating magnetic fields

Takashi KAMEDA, Kazuo OHKUMA, Nozomu ISHII, Natsuki SANO, Hideo OGURA, Kazuto TERADA

Author information

Keywords: Electromagnetic fields, Low frequency, Orthodontic appliances, Prosthetic appliances, Dental implants

JOURNAL FREE ACCESS

2012 Volume 31 Issue 5 Pages 856-862

DOI https://doi.org/10.4012/dmj.2012-129

Details

Abstract

Magnetic fields can represent a health problem, especially low frequency electromagnetic fields sometimes induced by electric current in metallic objects worn or used in or on the body (as opposed to high frequency electromagnetic fields that produce heat). Electric toothbrushes are widely used because of their convenience, but the electric motors that power them may produce electromagnetic waves. In this study, we showed that electric toothbrushes generate low frequency (1-2000 Hz) magnetic fields and induce electric current in dental appliances (e. g. orthodontic and prosthetic appliances and dental implants). Current induced by electric toothbrushes might be dependent on the quantity and types of metals used, and the shape of the appliances. Furthermore, these induced currents in dental appliances could impact upon human oral health, producing pain and discomfort.

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