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Medical Forum / General / Dentistry / March 2007

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Amalgam is dropped in a patient's oral cavity. How much of the mercury is absorbed by the body?

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don warner saklad - 17 Mar 2007 05:40 GMT
Amalgam is dropped in a patient's oral cavity. How much of the mercury
is absorbed by the body?
Mark & Steven Bornfeld - 17 Mar 2007 16:32 GMT
> Amalgam is dropped in a patient's oral cavity. How much of the mercury
> is absorbed by the body?

    The studies I've seen indicate that elemental mercury is poorly
absorbed by the gut, so the answer is probably not much.  Most
absorbtion of mercury due to amalgam is through the lungs.

Steve

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Mark & Steven Bornfeld DDS
http://www.dentaltwins.com
Brooklyn, NY
718-258-5001

don warner saklad - 17 Mar 2007 19:21 GMT
How could mercury get absorbed into lungs?... with what kind of
scenario
could that happen?...

> > Amalgam is dropped in a patient's oral cavity. How much of the mercury
> > is absorbed by the body?
>
>         The studies I've seen indicate that elemental mercury is poorly
> absorbed by the gut, so the answer is probably not much.  Most
> absorbtion of mercury due to amalgam is through the lungs.
Mark & Steven Bornfeld - 17 Mar 2007 19:31 GMT
> How could mercury get absorbed into lungs?... with what kind of
> scenario
> could that happen?...

    Mercury has a substantial vapor pressure at room temperature; the
anti-amalgam advocates often use an analyzer that assays the
concentration of mercury in oral air in ppm.  I won't comment on the
significance of this as an analytical tool--I don't get embroiled in
arguments with the anti-amalgam crowd.
    The crux (as I understand it) of the anti-amalgamists' concerns are
largely (but by no means totally) related to absorbtion though the
lungs.  There is no doubt that this does occur; the arguments usually
hinge on how much, and when, and clinical significance.

Steve

>>> Amalgam is dropped in a patient's oral cavity. How much of the mercury
>>> is absorbed by the body?
>>         The studies I've seen indicate that elemental mercury is poorly
>> absorbed by the gut, so the answer is probably not much.  Most
>> absorbtion of mercury due to amalgam is through the lungs.

Signature

Mark & Steven Bornfeld DDS
http://www.dentaltwins.com
Brooklyn, NY
718-258-5001

Chuck - 20 Mar 2007 09:55 GMT
>     The crux (as I understand it) of the anti-amalgamists' concerns are
> largely (but by no means totally) related to absorbtion though the
> lungs. There is no doubt that this does occur; the arguments usually
> hinge on how much, and when, and clinical significance.
>
> Steve

I deeply respect you for admitting this much. Most Dentists that I
have encountered will not even acknowledge that amalgams give off
vapor at all. Whether this is ignorance or 'CYA', I'm not sure.
Ingested amlgam (GI tract) can actually get methylated (brought into
its most toxic form, similar to Hg in waterways). Research it, and
again, I appreciate your honesty. CB
Steven Fawks - 20 Mar 2007 14:48 GMT
>>� � � � The crux (as I understand it) of the anti-amalgamists' concerns are
>>largely (but by no means totally) related to absorbtion though the
[quoted text clipped - 9 lines]
> its most toxic form, similar to Hg in waterways). Research it, and
> again, I appreciate your honesty. CB

I don't think you'll find very many dentist on the ng that will deny
that some amount of measurable mercury can come from amalgam dental
restorations.

However I don't think you will find any who attribute these small
exposures to any ill effects on patients.  Would zero exposure to
mercury be good?  Yes.

One thing is certain.  Some 'foreign material' has to be used to
restore decayed/fractured teeth.  Amalgam and composite resin are
the two least expensive alternatives.  Gold alloys and porcelain
are the two most expensive.

No patient needs to have amalgam in their mouth.  It is a personal and
economic choice.

BTW, I haven't used amalgam for over 20 years, but I don't think
my patients are any healthier for it (just prettier<G>).

D
Simplicio - 20 Mar 2007 20:48 GMT
> >>? ? ? ? The crux (as I understand it) of the anti-amalgamists' concerns are
>
> I don't think you'll find very many dentist on the ng that will deny
> that some amount of measurable mercury can come from amalgam dental
> restorations.

It is a fact, I believe the ADA has said so and they are practically
an institution.
I can't say what the largest amount of Hg released is or even give a
statistical
distribution, but if the filling holds together for a while it must be
small.

> However I don't think you will find any who attribute these small
> exposures to any ill effects on patients.  Would zero exposure to
> mercury be good?  Yes.

I know dentsply warns about poorly condensed amalgam, and true
researchers do occasionally *claim" to measure large amounts of Hg
being released from a filling in scientific papers, but Mackert at the
ADA says he can barely see the mercury from the amalgam. He has no
reason to lie, and even if less Hg comes from fish, mercury from teeth
is commonplace and safe according to the ADA I believe

> No patient needs to have amalgam in their mouth.  It is a personal and
> economic choice.

Yes and the ADA has done it's best to warn patients even though they
haven't had a majority vote
to give out warning sheets to patients yet. Overall, I think in all
this mess dentists are
the real "victims" from Hg exposure
Carol - 21 Mar 2007 15:25 GMT
On Tue, 20 Mar 2007 09:01:44 -0500, in
<1174398426_2456@news.newsville.com> Steven Fawks
<tuthjockey@myturbonet.com> wrote:

>I don't think you'll find very many dentist on the ng that will deny
>that some amount of measurable mercury can come from amalgam dental
>restorations.
>
>However I don't think you will find any who attribute these small
>exposures to any ill effects on patients.  

Part of the argument is how small the exposure really is.  Besides the
initial exposure, many believe that mercury vapor continues to be
released in significant quantity any time the individual eats
particularly hard or hot food, clenches or grinds the teeth due to
stress, or even with vigorous tooth brushing.  It makes some sense; if
there have been studies they shouldn't be too hard for a responsible
dentist to seek out.  None of which is to say removal of old amalgam
is the solution.  Apparently emissions do decrease over time and
removing old amalgam en masse can produce huge (anecdotally deadly)
emissions all at once.

>Would zero exposure to
>mercury be good?  Yes.

Definitely, but whether or not any exposure is "safe" depends on the
total toxic load of the individual, not to mention the individual's
detoxification capabilities, which are in part hereditary.  A person
with 6, 8, 10 amalgam fillings may have no problem until they, for
instance, buy a new car (benzene et al from plastics), a new house
(formaldehyde), or an old house (mold risk), in a city or under an
airport runway approach (air pollution, various proven poisons), and
maybe decide to start eating tuna salad for lunch 3 times a week (more
mercury), and switch to diet soda.  Maybe they've also gotten a new
job that requires dry cleaning of the work wear, and the workplace has
recently been treated for some insect infestation.  This person is
virtually guaranteed to get sick, and to feel particularly sick at
work.  The mercury in their mouth is only one avoidable part of the
problem. Many times the toxicity takes years or even decades to build
up enough to produce symptoms, and poor diet (high sugar, low
antioxidants) in too much of the US population is a contributing
factor.  There really is no sense in blaming a single source for most
people, but eliminating any single source will always prove helpful.
Further, the symptoms are also highly individualized, and may be
diagnosed by, umm... "unenlightened" doctors as almost any disease you
could name.

[Previous paragraph references the work of Multiple Chemical
Sensitivity Expert Sherry A. Rogers, MD, and she's not alone.  For
copious references and exact statements, see her books;
prestigepublishing.com]

Perhaps dentists would be well advised to ask about other
chemical/metal sensitivities, and allergies, before deciding to use
amalgam vs. recommending some other material.  Adhesives can be a
problem in sensitive individuals, but at least they're not heavy
metals.

>BTW, I haven't used amalgam for over 20 years,

Hear, hear!!

>but I don't think
>my patients are any healthier for it (just prettier<G>).

Ohhhhh... I expect you're ALL healthier for it.
Thank you for not contributing to the problem, and may your meme
spread far and wide.

I am not a doctor, and do not have any amalgam fillings or obvious
metal sensitivities, but members of my family do.  And yes, I'm
becoming a horrible buttinsky.  :-)  

Carol
 
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