Professor Rowe and Dental Amalgam

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Profesor DM Rowe, head of the thermoelectrics research group at Cardiff University
in Wales, claims that he would be able to determine experimentally what is
the largest electromotive force that can be generated by a metal amalgam
dental filling as a result of its thermoelectric properties (Ref.1).

Is there any valid reason why he should not be allowed to do this?

Can anyone offer any rational explanation as to why this should not already
have been done a long time ago?

Keith P Walsh

Ref 1. e-mail correspondence, 30 October 1998

Maybe because Mercury

Maybe because Mercury (amalgam)from fillings contributes 3 to 4 times more mercury to our bodies than all the environmental sources combined. Many people still don't realize that the majority of the new cavities we see in children today occur just in the center of the molar teeth. The tiny groves there are flaws which invite early decay. By the age of 6 a child has 4 permanent first molars. Mercury fillings require the removal of the middle third of the tooth. The material itself is weak and cannot be used in a thin layer. The dentist must drill deeply into the softer dentin area of the tooth and drill undercuts into the healthy tooth even where there is no disease. This approach was developed in 1908 by G.V. Black. As a result of this kind of filling, the tooth is now weakened by 75%. Mercury fillings also expand after being placed in the tooth. The bigger the filling the more they expand. If any moisture gets into the filling they expand rapidly. Temperature can also cause expansion. All this expansion within the tooth eventually results in fracture. Once broken the tooth may require a root canal or crown or extraction. Often the fracture is so severe that in spite of all efforts the tooth is lost.

Phoenix Dentists

Anecdotal evidence of

Anecdotal evidence of neurological disorders in people with amalgam fillings in their teeth is sometimes attributed to the toxic action of the mercury content of the fillings.

However, of equal if not greater concern are the possible effects of the electrical potentials generated by amalgam dental fillings on normal neurological function.

It has been demonstrated experimentally that amalgam fillings generate electrical potentials with magnitudes of up to 350 millivolts. See:

http://book.boot.users.btopenworld.com/dutch.htm

And it has also been demonstrated experimentally that these amalgam potentials can be measured even when the amalgams are not in contact with any saliva in the mouth. See:

http://jdr.sagepub.com/cgi/reprint/31/2/205

If these amalgam potentials are due primarily to some physical phenomenon other than electrolysis, then the likeliest candidates are either thermoelectric phenomena or faradaic (electromagnetic) phenomena, or perhaps a combination of the two.

In establishing the relative influences of these respective phenomena in producing the levels of electrical potentials which have been recorded, it might be considered appropriate to determine experimentally what is the largest thermoelectric potential that can be generated by a metal amalgam dental filling.

Indeed, in view of the fact that amalgam fillings are placed in children's teeth, and are subjected to thermal gradients all the time whilst they remain in the mouth, it might even be considered essential.

Ten years ago Professor Rowe of the Thermoelectrics Group at Cardiff University asserted that this measurement would be easy to do.

Can anyone offer any explanation as to why it still appears not to have been done?

(Don't forget that Professor Anatychuk in the Ukraine thinks that thermoelectric effects emanating from only ordinary temperature differentials in metals are sufficient to excite neurological function in animal tissue.)

Keith P Walsh