This is the purpose of composite filling material ~ its a great
Question for our electrical buddies .......... There is a material
that is widely used in dentistry and also used for insulating
transatlantic cables ....... what is that material?
Absolutely correct! Its gutta percha, the orange material that comes
in various sizes to correspond with the bore of the root canal space.
It is also used in huge quantities as transatlantic cable insulation.
It comes from Indonesia.
Do you believe Timex should be legally obligated to inform people that no
controlled studies have been published demonstrating that
these potentials are not able to dissipate electrical energy through the
nerves in people's heads? And what about the poor souls that carry a
pocket watch? Think of the potential consequences!
Give up while you're ahead carabelli, you'll never beat Joel at idiotic
how can you compare a battery in a watch on a wrist (skin is a good
insulator btw which is why we need EKG paste) to an amalgam on the
dental pulp which is hot-wired to the brain via cranial nerves..?
You need to post some hard numbers, not some "philosphy of
science" stuff about ubiquity of temperature gradient.
By "figure out" I thought I was clear in suggesting that
you put the equations down on paper and determine the
value of mu based on an amalgam model. This shouldn't
be hard to derive at all. I believe you will find based on
a properly calculated mu that the dT will be in the
hundreds if not thousands in order to provide even 1 mV
of change in potential.
You continue to post generalizations and scattered
quotations from all over the place. Please prove your
point by doing at least a little simple math.
I stand corrected. Ouch!!! Also did anyone notice in the
original paper that the 350 mV was a worst case peak and
that the mean was around 17 mV or so? These voltage levels
might be more due to the grounding (or lack thereof) in
the lab equipment than to an actual potential across the
blob of amalgam.
I suspect that many people involved in this "debate" won't have even
bothered to read the original paper.
The mean of 17mV for the measured amalgam potentials was quoted
alongside the standard deviation for the same data of plus or minus
This indicates that significant numbers of the measured potentials
were large (compared with 17mV) and positive, whilst significant
numbers of others were large and negative.
The mean value of 17mV is therefore of limited use in understanding
the nature of these potentials.
I can illustrate this point with two examples of the limited
usefulness of arithmetic means.
Firstly, if I report that I there is a group of five males with a mean
age of 25 going to a football game, then you might get the wrong
impression about the nature of this group if you don't know that their
individual ages are actually 7, 9, 13, 36 and 60.
More relevantly, if I measure an electrical potential of minus 150mV
in one of a person's two amalgam fillings, and another electrical
potential of plus 150mV in the other, then I shouldn't expect to be
able to convince anyone other than an idiot that because the
arithmetic mean of the two potentials is zero then it can be declared
that neither exists.
I'm not aware of any definitive explanation as to why some amalgams
appear to indicate negative potentials whilst others appear to
indicate positive ones when measured under comparable conditions.
However, in a simple theoretical model it might be regarded as logical
to suggest that if the surface of one amalgam indicating a positive
potential were to be connected via a conductive path to the surface of
another amalgam indicating a negative potential, then the potentials
might combine additively in the same way that ordinary batteries do
when connected in series, possibly producing an even greater combined
This might then explain the situation whereby individuals have
reported excruciating pain when biting on a piece of metallic foil in
the mouth, especially if the nerves behind the teeth are able to
complete an "electrical circuit" through which the electrical
potentials involved may be dissipated.
The resting potentials of human neurological cells have been measured
And it has been demonstrated experimentally that amalgam dental
fillings generate electrical potentials with magnitudes of up to
Amalgam fillings are placed in children's teeth.
I believe that experimental investigations should therefore have been
carried out in order to determine whether or not the electrical
potentials generated by amalgam fillings are able to dissipate
electrical energy through the nerves in people's heads (perhaps at
lower levels and on a continual basis without any tin-foil being
Would you not agree?
Keith P Walsh
But then you are saying that the actual measurement conducted
was of limited use and probably invalid. The experimenters
should have used a statistically large sample which would
provide more confidence in the end results, or they should
have employed a statistical model that better represents the
The fact that some amalgams provide oppositely charged
potentials makes me even further suspicious of the
methodologies employed and conclusions arrived at during
the experiment in question. It sounds more to me like
their measurements are dominated by noise.
Well they did quote a standard deviation for the data of plus or minus
111mv, indicating that significant numbers of the amalgam potentials
measured were large (as compared with 17mV) and positive, whilst
significant numbers of others were large and negative.
By "noise" do you mean electromagnetic interference?
And, if so, would you be able to suggest a means of demonstrating
experimentally whether or not the measuring instruments that these
researchers used might have been more sensitive to this type of
"noise" than the metal amalgam dental fillings which they were taking
the measurements from?
Keith P Walsh
It sounds like their data do not conform well to a gaussian
distribution. How many samples did they obtain? And
measuring both positive and negative potentials is a
big warning sign of corrupted data for me.
It could be due to EM interference, poor grounding, uncalibrated
equipment, moisture in the air, or equipment pushed beyond its
accuracy/precision ratings. It could also be due to
inconsistencies in experimental procedure.
To demonstrate, take a handheld digital multimeter (such as
those from flukemeter.com), set it to VDC, and wave the
two prongs around, touch them to separate fingers, etc. You
will see voltage variations all over the map. A robust
measurement of the potential across a small object such
as an amalgam at millivolt accuracies will require careful
and systematic experimental procedures as well as a full
accounting of potential sources of error.
a digital watch only requires 1.5V to work
and with your crazy idea that there is a temperture gradient all the
why do we still need a battery in a digital watch???
As far as the scientist you quoted I have no Idea who they are but you
mentioned an amalgamation of metals dipped in mercury,
that is different that dental amalgam and how it is being used in the
mouth vs some experiment we know nothing about.
I don't remember placing batteries next to my amalgam restorations in dental
I would think one would need a steam engine and generator for this conversion
firstname.lastname@example.org (madiba) wrote in message
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