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Medical Forum / General / Dentistry / March 2005

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Neurological Effects Of Amalgams

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LadyLollipop - 18 Mar 2005 08:52 GMT
Once mercury has leached from the dental fillings and infiltrated the body,
mercury becomes a neurotoxin. Mercury is more neurotoxicthan arsenic and far
more neurotoxic than lead.

Once inhaled, elemental mercury is mostly converted to an
inorganic divalent or mercuric form by catalase in the red blood cells. This
inorganic form has similar properties to organic mercury. Small amounts of
non-oxidized elemental mercury continue to persist and account for CNS
toxicity. Elemental mercury, as a vapor, which escapes from fillings,
penetrates the blood-brain-barrier and enters the CNS, where it's ionized
andtrapped, attributing to its significant toxic effects. It is not well
absorbed
by the GI tract and, when ingested, is only mildly toxic. Inorganic mercury
is
highly toxic and corrosive and is the most destructive form, but its
destruction is limited to where it's located. It doesn't have the ability to
move through tissues like other forms. It gains access orally or dermally
and
is absorbed at a rate of 10% of that ingested. It has a nonuniform mode of
distribution, secondary to poor fat solubility, and accumulates mostly in
the
kidney, causing renal damage

A dentist can't legally throw amalgam material or extracted amalgam filled
teeth in the trash, bury them in the ground, or put them in a landfill, but
the
ADA and the EPA say it's okay to put it in people's mouths. In 1976, the
U.S.
Congress requested that the FDA "classify" dental amalgam fillings. The
Federal
Register recorded another such request in 1980. Multiple requests have been
made over the years, yet there is still no classification of dental amalgam.
The FDA has steadily refused to classify amalgam. The government agencies
have
been defending the use of mercury. Consider for a moment the national
consequences if mercury in fillings were reported to be dangerous. The
offending parties (dentists, the ADA, dental manufacturers and
distributors),
if found guilty would be liable.

Low-level chronic exposures to mercury may affect the peripheral nervous
system resulting in polyneuropathies (reduced sensory and motor nerve
function)
and neuropsychological effects (visual alterations, sensory loss, stress)
(ATSDR 1989); these effects correlate to tissue levels of 20 to 40 ?g/g.
Neuropsychological effects were also reported by Smith et al. (1970) for
occupational exposure to mercury levels of > 0.1 mg/m3. Mercury
concentrations
below this value did not appear to cause observable effects. Kishi et al.
(1993) reported that neurobehavioral and motor function effects persisted in
ex-mercury miners more than 10 years after cessation of exposure.

Mercury vapor from dental amalgams has been identified as a major source of
exposure to inorganic mercury in the general population (WHO 1991). An
average
mercury dose from dental amalgams has been estimated to be only 4 to 5 ?g
(Halbach 1995).

1. Central nervous system and kidneys: Both the central nervous system and
kidneys are affected by inorganic mercury. The toxic effects may occur with
acute, subchronic, or chronic exposure depending on the exposure level and
the
resulting body burden of mercury. Animal data suggest that the renal effects
may be immunologically mediated. The central nervous system, especially
during
prenatal and postnatal development, is the primary target organ for methyl
mercury.

3.4.2.1. Primary Target Organ(s)1. Central nervous system and peripheral
nervous system: The critical target organs for inhalation exposure to
elemental
mercury vapor are the central nervous system and the peripheral

- Hide quoted text -
- Show quoted text -

nervous system.

http://www.mercuryeis.com/docu?ments/healthfactsheet_screen.p?df
The Central Nervous system is the major organ afected by chronic (long term)
exposure to elemental mercury
http://www.orcbs.msu.edu/AWARE?/pamphlets/hazwaste/mercuryfac?ts.html
Chronic effects include central nervous system effects, kidney damage and
birth
defects. Genetic damage is also suspected.Nervous system effects. These are
the
most critical effects of chronic mercury exposure from adult exposure as
they
are consistent and pronounced. some elemental mercury is dissolved in the
blood
and may be transported across the blood/brain barrier, oxidized and retained
in
brain tissue
http://robleslawcenter.com/Mer?cury.htm
Mercury poisoning is the ill effects on humans nervous system and other
bodily
systems due to the over-exposure of mercury. Mercury is a neurotoxin,
meaning
it affects the nervous system
Nerve damage: It may start with a fine tremor (shaking) of the hand, loss of
sensitivity in hands and feet, difficulty in walking, or slurred speech.
Tremors may also occur in the tongue and eyelids. Eventually this can
progress
to trouble balancing and walking. It has even caused paralysis and death in
rare cases.
http://www.vdh.state.va.us/HHC?ontrol/Mercury.PDF
The Nervous System is sensitive to all forms of mercury.
http://www.llnl.gov/es_and_h/h?sm/doc_14.05/doc14-05.html#2.1
All forms of mercury are toxic. Elemental mercury, as a vapor, penetrates
the
central nervous system, where it is ionized and trapped, attributing to its
extreme toxic effects
Peter Bowditch - 18 Mar 2005 11:17 GMT
<snip horrors>

>A dentist can't legally throw amalgam material or extracted amalgam filled
>teeth in the trash, bury them in the ground, or put them in a landfill, but
>the
>ADA and the EPA say it's okay to put it in people's mouths.

Jan, a dentist can't legally throw blood or cooking oil into the
trash, but the ADA and the EPA say it's ok to have them in your mouth.

What point are you trying to make?

<snip more horrors>

Signature

Peter Bowditch
The Millenium Project
    http://www.ratbags.com/rsoles
Australian Council Against Health Fraud
    http://www.acahf.org.au
To email me use my first name only at ratbags.com

Joel M. Eichen - 18 Mar 2005 13:58 GMT
><snip horrors>
>
[quoted text clipped - 5 lines]
>Jan, a dentist can't legally throw blood or cooking oil into the
>trash, but the ADA and the EPA say it's ok to have them in your mouth.

True, then again our french fries are way overpriced .....

>What point are you trying to make?
>
><snip more horrors>
LadyLollipop - 18 Mar 2005 17:40 GMT
> <snip horrors>

Well, well. Yes, Peter, bother mercury poisoning and peripheral neuropathy
caused by mercury in the mouth is horrible. Perhaps many *unanswer* health
problems will be soloved and these horrors can be relieved, when amalgams
are bannned it's people like this groups and YOU who are slowing down the
works all because of EGO. It is truly horrible that the lies from *organized
medicine and dentistry* are responsible for this horrible suffering.

>>A dentist can't legally throw amalgam material or extracted amalgam filled
>>teeth in the trash, bury them in the ground, or put them in a landfill,
>>but
>>the
>>ADA and the EPA say it's okay to put it in people's mouths.

<snup diversion and ye ole spupid skeptic tricks from those who care less if
people suffer>

> <snip more horrors>

Now to repost *truth*

Once mercury has leached from the dental fillings and infiltrated the body,
mercury becomes a neurotoxin. Mercury is more neurotoxicthan arsenic and far
more neurotoxic than lead.

Once inhaled, elemental mercury is mostly converted to an
inorganic divalent or mercuric form by catalase in the red blood cells. This
inorganic form has similar properties to organic mercury. Small amounts of
non-oxidized elemental mercury continue to persist and account for CNS
toxicity. Elemental mercury, as a vapor, which escapes from fillings,
penetrates the blood-brain-barrier and enters the CNS, where it's ionized
andtrapped, attributing to its significant toxic effects. It is not well
absorbed
by the GI tract and, when ingested, is only mildly toxic. Inorganic mercury
is
highly toxic and corrosive and is the most destructive form, but its
destruction is limited to where it's located. It doesn't have the ability to
move through tissues like other forms. It gains access orally or dermally
and
is absorbed at a rate of 10% of that ingested. It has a nonuniform mode of
distribution, secondary to poor fat solubility, and accumulates mostly in
the
kidney, causing renal damage

A dentist can't legally throw amalgam material or extracted amalgam filled
teeth in the trash, bury them in the ground, or put them in a landfill, but
the
ADA and the EPA say it's okay to put it in people's mouths. In 1976, the
U.S.
Congress requested that the FDA "classify" dental amalgam fillings. The
Federal
Register recorded another such request in 1980. Multiple requests have been
made over the years, yet there is still no classification of dental amalgam.
The FDA has steadily refused to classify amalgam. The government agencies
have
been defending the use of mercury. Consider for a moment the national
consequences if mercury in fillings were reported to be dangerous. The
offending parties (dentists, the ADA, dental manufacturers and
distributors), if found guilty would be liable.

(OH HORRORS, LET PEOPLE SUFFER!!!!!)

Low-level chronic exposures to mercury may affect the

***************** peripheral nervous system ************

(DING DING DING!!!)

resulting in polyneuropathies (reduced sensory and motor nerve
function)
and neuropsychological effects (visual alterations, sensory loss, stress)
(ATSDR 1989); these effects correlate to tissue levels of 20 to 40 ?g/g.
Neuropsychological effects were also reported by Smith et al. (1970) for
occupational exposure to mercury levels of > 0.1 mg/m3. Mercury
concentrations
below this value did not appear to cause observable effects. Kishi et al.
(1993) reported that neurobehavioral and motor function effects persisted in
ex-mercury miners more than 10 years after cessation of exposure.

Mercury vapor from dental amalgams has been identified as a major source of
exposure to inorganic mercury in the general population (WHO 1991). An
average
mercury dose from dental amalgams has been estimated to be only 4 to 5 ?g
(Halbach 1995).

1. Central nervous system and kidneys: Both the central nervous system and
kidneys are affected by inorganic mercury. The toxic effects may occur with
acute, subchronic, or chronic exposure depending on the exposure level and
the
resulting body burden of mercury. Animal data suggest that the renal effects
may be immunologically mediated. The central nervous system, especially
during
prenatal and postnatal development, is the primary target organ for methyl
mercury.

3.4.2.1. Primary Target Organ(s)1. Central nervous system and

********peripheral nervous system:**********

(DING DING DING!!!!!)

The critical target organs for inhalation exposure to
elementalmercury vapor are the central nervous system and the

************peripheral nervous system****************.

(HELLOOOOOOOOOOOOOOOOOOOOOOOOO!!!!)

http://www.mercuryeis.com/docu?ments/healthfactsheet_screen.p?df
The Central Nervous system is the major organ afected by chronic (long term)
exposure to elemental mercury
http://www.orcbs.msu.edu/AWARE?/pamphlets/hazwaste/mercuryfac?ts.html
Chronic effects include central nervous system effects, kidney damage and
birth
defects. Genetic damage is also suspected.Nervous system effects. These are
the
most critical effects of chronic mercury exposure from adult exposure as
they
are consistent and pronounced. some elemental mercury is dissolved in the
blood
and may be transported across the blood/brain barrier, oxidized and retained
in
brain tissue
http://robleslawcenter.com/Mer?cury.htm
Mercury poisoning is the ill effects on humans nervous system and other
bodily
systems due to the over-exposure of mercury. Mercury is a neurotoxin,
meaning
it affects the nervous system
Nerve damage: It may start with a fine tremor (shaking) of the hand, loss of
sensitivity in hands and feet, difficulty in walking, or slurred speech.
Tremors may also occur in the tongue and eyelids. Eventually this can
progress
to trouble balancing and walking. It has even caused paralysis and death in
rare cases.
http://www.vdh.state.va.us/HHC?ontrol/Mercury.PDF
The Nervous System is sensitive to all forms of mercury.
http://www.llnl.gov/es_and_h/h?sm/doc_14.05/doc14-05.html#2.1
All forms of mercury are toxic. Elemental mercury, as a vapor, penetrates
the
central nervous system, where it is ionized and trapped, attributing to its
extreme toxic effects

==========
http://toxnet.nlm.nih.gov/cgi-?bin/sis/search/f?./temp/~afXN4?4:14

The dental amalgam issue: A review.
Authors: HANSON M
PLEVA J

Author Address: Nils Pals vag 28, S-24014 Veberod, Swed.

Source: EXPERIENTIA (BASEL); 47 (1). 1991. 9-22.

Abstract: BIOSIS COPYRIGHT: BIOL ABS. Using an interdisciplinary approach,
the
current position in the dental amalgam controversy and the potential impact
of
amalgam mercury of human health are reviewed. Aspects of materials science,
corrosion, mercury exposure, toxicology, neurology and immunology are
included.
New data on mercury exposure form corroded amalgam fillings in vivo are
presented. The exposure can reach levels considerably over known threshold
limit values. Also, measurements of mercury absorption from intraoral air
are
presented. The vital importance of avoiding a galvanic amalgam-gold coupling
is
emphasized. the symptomatology of a disabled patient, who recovered after
amalgam removal, has been included. It is concluded that discussion of the
dental amalgam issue has suffered from the lack of an interdisciplinary
approach. It would be wise to learn from the lesson of acrodynia, and
consider
amalgam mercury among other possible factors in neurological and
immunological
diseases of unclear etio

http://toxnet.nlm.nih.gov/cgi-?bin/sis/search/f?./temp/~afXN4?4:24

Neurological and behavioural disorders in humans have been observed
following
inhalation of elemental mercury vapour, ingestion or dermal application of
inorganic mercury-containing medicinal products, such as teething powders,
ointments, and laxatives, and ingestion of contaminated food. A broad range
of
symptoms has been reported, and these symptoms are qualitatively similar,
irrespective of the mercury compound to which one is exposed. Specific
neurotoxic symptoms include tremors, emotional lability, insomnia, memory
loss,
neuromuscular changes, headaches, polyneuropathy, and performance deficits
in
tests of cognitive and motor function. Although improvement in most
neurological dysfunctions has been observed upon removal of persons from the
source of exposure, some changes may be irreversible. Acrodynia and
photophobia
have been reported in children exposed to excessive levels of metallic
mercury
vapours and/or inorganic mercury compounds. As with many effects, there is
great variability in the susceptibility of humans to the neurotoxic effects
of
mercury. The primary effect of long-term oral exposure to low amounts of
inorganic mercury compounds is renal damage. Inorganic forms of mercury have
also been associated with immunological effects in both humans and
susceptible
strains of laboratory rodents,

http://toxnet.nlm.nih.gov/cgi-?bin/sis/search/f?./temp/~afXN4?4:29

Mercury Burden and Health Impairment in Dental Auxilaries

Authors: Shapiro IM
Bloch P
Ship II
Spitz L
Sumner A
Uzzell B

Source: Final Report, Grant R01-OH-00886, 26 pages, 8 references0000

Abstract: An effort was made to develop a safe and effective x-ray
fluorescence
system for monitoring mercury (7439976) and other elements in human tissues
in-situ, to determine mercury levels in 207 dental auxiliaries exposed to
dental amalgam on the job, to evaluate mercury in matching nonexposed
populations and in 298 dentists using mercury amalgam, and to evaluate
deficiencies in central and peripheral nervous systems resulting from the
mercury exposure. Mercury levels were below 20 micrograms/gram in 60 percent
of
the dentists and 90 percent of the dental auxiliaries. Dentists with the
higher
mercury concentrations in their heads or wrists had considerably longer
median
motor distal latencies and median F-wave latency. Five of them demonstrated
abnormalities consistent with carpal tunnel syndrome; seven had
polyneuropathies defined as reduced motor or sensory conduction velocities
of
response amplitudes in two or more nerves. No significant differences were
found in the results of neurological studies conducted on dental
auxiliaries,
whether they had high levels or no detectable levels of mercury in their
bodies. Neuropsychological tests indicated both groups of dental workers
were
adversely affected by mercury exposure. Deficits were noted in performance
in
grooved pegboard and recurrent figures tests.

http://www.epa.gov/epaoswer/ha?zwaste/mercury/medical.htm

Safe Mercury Management

http://www.edelsoncenter.com/M?ercury/mercury_amalgams.htm

http://tuberose.com/Mercury.ht?ml

Horrror,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,You betcha!!!!

LL
 
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