2
Okt
2008

Mercury release from dental amalgam restorations after magnetic resonance imaging and following mobile phone use

Pak J Biol Sci. 2008 Apr 15;11(8):1142-6.
Mercury release from dental amalgam restorations after magnetic resonance imaging and following mobile phone use.
Mortazavi SM, Daiee E, Yazdi A, Khiabani K, Kavousi A, Vazirinejad R, Behnejad B, Ghasemi M, Mood MB.

Department of Medical Physics, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran.

In the 1st phase of this study, thirty patients were investigated. Five milliliter stimulated saliva was collected just before and after MRI. The magnetic flux density was 0.23 T and the duration of exposure of patients to magnetic field was 30 minutes. In the 2nd phase, fourteen female healthy University students who had not used mobile phones before the study and did not have any previous amalgam restorations were investigated. Dental amalgam restoration was performed for all 14 students. Their urine samples were collected before amalgam restoration and at days 1, 2, 3 and 4 after restoration. The mean +/- SD saliva Hg concentrations of the patients before and after MRI were 8.6 +/- 3.0 and 11.3 +/- 5.3 microg L(-1), respectively (p < 0.01). A statistical significant (p < 0.05) higher concentration was observed in the students used mobile phone. The mean +/- SE urinary Hg concentrations of the students who used mobile phones were 2.43 +/- 0.25, 2.71 +/- 0.27, 3.79 +/- 0.25, 4.8 +/- 0.27 and 4.5 +/- 0.32 microg L(-1) before the amalgam restoration and at days 1, 2, 3 and 4, respectively. Whereas the respective Hg concentrations in the controls, were 2.07 +/- 0.22, 2.34 +/- 0.30, 2.51 +/- 0.25, 2.66 +/- 0.24 and 2.76 +/- 0.32 microg L(-1). It appears that MRI and microwave radiation emitted from mobile phones significantly release mercury from dental amalgam restoration. Further research is needed to clarify whether other common sources of electromagnetic field exposure may cause alterations in dental amalgam and accelerate the release of mercury.

PMID: 18819554 [PubMed - in process]

//www.ncbi.nlm.nih.gov/pubmed/18819554?dopt=AbstractPlus


Informant: Dorothee Krien

See also: //groups.google.com/group/mobilfunk_newsletter/t/21c3008dd9ea721

--------

From: Olle Johansson
To: Martin Weatherall
Sent: Monday, October 06, 2008 6:55 AM
Subject: Re: Mercury release from dental amalgam restorations after magnetic resonance imaging and following mobile phone use.

This is extremely interesting and completely in line with the fundamental studies by the Swedish team of Per Högstedt and Thomas Örtendahl!

Ortendahl TW, Hogstedt P, Holland RP, "Mercury vapor release from dental amalgam in vitro caused by magnetic fields generated by CRT's and electrical cutting procedures", Swed Dent J 1991, p 31, abstract 22

I have tried for years and years to get money to repeat their studies and to expand them to mobile phone use - so I am very happy to see it finally to get momentum!

Olle Johansson, assoc. prof.
The Experimental Dermatology Unit
Department of Neuroscience
Karolinska Institute
171 77 Stockholm
Sweden
&
Professor
The Royal Institute of Technology
100 44 Stockholm
Sweden

 

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