Magnetic field effects on dental amalgam in divers welding and cutting electrically underwater
Divers have for some years been complaining about a metallic taste in the mouth while electrically welding and cutting underwater. This paper reports on results from an assessment of this problem. It was hypothesized that the magnetic fields arising from the welding or cutting current could correlate with the reported symptoms. The intraoral magnetic flux density was calculated to 1.15 mT, at 650 ADC, in a normal cutting situation. This was verified in vivo. This magnetic field was shown to contain an AC component that is a candidate for inducing secondary currents in the oral tissues and restorative materials. Five submerged divers exposed to a magnetic field of 0.35 mT did not report any metallic taste. Magnetophosphenes were reported by 1 diver. (Magnetophosphenes are luminous impressions due to excitement of the retina by a magnetic field in addition to or in place of impingement of light rays.) Only a slight shielding effect to magnetic fields was observed due to a copper-brass helmet. An in vitro model for exposure of dental amalgams to magnetic fields was designed. Recommendations for decreasing the magnetic field surrounding the diver in practical work is given.
- Research Organization:
- Gothenburg Univ. (Sweden)
- OSTI ID:
- 6071139
- Journal Information:
- Undersea Biomed. Res.; (United States), Vol. 15:6
- Country of Publication:
- United States
- Language:
- English
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ELECTROMAGNETIC FIELDS
BIOLOGICAL EFFECTS
ORAL CAVITY
MAGNETIC FLUX
WELDING
UNDERWATER
CARIES
MATHEMATICAL MODELS
METALS
RECOMMENDATIONS
RETINA
TASTE BUDS
TEETH
BODY
BODY AREAS
DIGESTIVE SYSTEM
ELEMENTS
EYES
FABRICATION
FACE
HEAD
JOINING
LEVELS
ORGANS
PATHOLOGICAL CHANGES
SENSE ORGANS
560400* - Other Environmental Pollutant Effects