Medical Forum / General / Dentistry / March 2005
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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