Re: Faradaic Activity in Dental Amalgams


CWatters Wrote:
> <clintonz @prodigy.net=""> wrote in message
> news:1125593359.559431.254690@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >
> > Keith didn't say anything about the current. He only said
> > that the amalgam generated .35 volts. Heat dissipated would be
> V*V/R,
> > so remember for a given voltage the greater the resistance of the
> > amalgam actually the less heat is generated!
>
> Any reference to heat in this context is a wind-up.
>
> Any voltage produced is likely to be between the filling and the
> surrounding
> material NOT within or accross the filing. Even then a figure of .35V
> is
> likely to be the open circuit voltage - the mechanisim causing the
> voltage
> is unlikely to be able to support any significant current flow - at
> least as
> far as heating is concerned.
I have question. Bill K says the resistance of the amalagm material is
extremly high. Keith said the amalgam generated .35V. SWatters sayd
the mechanism supplying the voltage is unlikely to support any
significant current flow.

If voltage = current x resistance

...you must have at least some current, correct?

...even if the resistance is really high... or am I missing something?
Does overall impedance come into play here?

Thanks -Sue
</clintonz>


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Sue
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