Papers

Peer-reviewed
Dec, 2013

Magnetic fields from electric toothbrushes promote corrosion in orthodontic stainless steel appliances but not in titanium appliances

DENTAL MATERIALS JOURNAL
  • Takashi Kameda
  • ,
  • Kazuo Ohkuma
  • ,
  • Hirotake Oda
  • ,
  • Natsuki Sano
  • ,
  • Nomintsetseg Batbayar
  • ,
  • Yukari Terashima
  • ,
  • Soh Sato
  • ,
  • Kazuto Terada

Volume
32
Number
6
First page
959
Last page
969
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.4012/dmj.2013-179
Publisher
JAPANESE SOC DENTAL MATERIALS DEVICES

Electric toothbrushes are widely used, and their electric motors have been reported to produce low-frequency electromagnetic fields that induced electric currents in metallic objects worn by the users. In this study, we showed that electric toothbrushes generated low-frequency magnetic fields (MFs) and induced electric currents in orthodontic appliances in artificial saliva (AS), which accelerated corrosion in stainless steel (SUS) appliances, but not in titanium (Ti) appliances; the corrosion was evaluated by using an inductively coupled plasma-optical emission spectrometer and a three-dimensional laser confocal microscope. The pH of AS used for appliance immersion did not change during or after MF exposure. These results suggested that MF-induced currents from electric toothbrushes could erode SUS appliances, but not Ti appliances, because of their high corrosion potentials. Further studies are required to clarify the mechanisms of metallic corrosion by induced currents in dental fields, which may trigger metal allergies in patients.

Link information
DOI
https://doi.org/10.4012/dmj.2013-179
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000330489700014&DestApp=WOS_CPL
ID information
  • DOI : 10.4012/dmj.2013-179
  • ISSN : 0287-4547
  • Web of Science ID : WOS:000330489700014

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