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Silver amalgam fillings, mercury toxicity and detox

Dental opinion verses scientific fact

Dental opinion

Once the mercury is mixed with other metals in the filling it is 'locked in'.

Scientific fact

Mercury vapour is continuously released from 'silver fillings' (4), more vapour is released by chewing (3-5); tooth brushing (6); and eating hot, salty or acidic foods or drinks (7).

The more 'silver fillings' you have, the more your daily exposure to mercury (4).

Once you have stopped chewing, it takes 90 minutes for the rate of mercury release to drop back to its pre-chewing rate (4,5). Thus you are susceptible to a roller coaster of mercury vapour all day. Breakfast will cause the release of mercury to rise, and just as it falls it's time for the mid-morning coffee break so the mercury release goes up again. This pattern goes on all day with lunch, mid-afternoon coffee, dinner and supper.


Dental opinion

Mercury from 'silver fillings' is not retained and is in such small doses that it has no effect on the health of the body.

Scientific fact

German (6), Swedish and American investigations (8) have found that human brain and kidney tissues from people with 'silver fillings' contained more mercury than those tissues of people without 'silver fillings'. The amount of mercury in the brain tissue of the people with 'silver fillings' correlated to the number of fillings they had i.e. the more fillings the person had, the higher the concentration of mercury in the brain tissues.

It has now been established that the mercury from dental 'silver fillings' constitutes the largest single source of inorganic mercury exposure to the general population - greater than all the other environmental sources combined (10). Despite replicated scientific findings, dental authorities maintain that 'silver' dental fillings are safe. They base this on the fact that the fillings have been in use for 150 years. They do not recognise that sickness or death might arise as a result of such fillings, and dentists are nether trained or licensed to determine mercury toxicity (11).

However, from the medical perspective 'silver fillings' are considered a significant source of mercury with significant potential for toxic impact. Medical researchers are now investigating the possible health risks of mercury from 'silver fillings'.

The latest medical research shows that mercury from 'silver fillings' accumulates in all the adult tissues, with the highest levels being found in the kidney and liver (13); and that, during pregnancy, mercury will cross the placenta and accumulate in the developing baby within two days of having a filling placed (14).

Although there have been reports to suggest a relationship between the presence of 'silver fillings' and human health, it is only recently that science has established a direct cause and effect link between 'silver fillings' and pathology.

Experiments carried out at the Departments of Medicine, Pathology and Physiology at Calgary University by M.J.Vimy, N.D.Boyd, D.E.Hooper and F.L.Lorscheider show a 50% reduction in kidney function in sheep one month after placement of 'silver fillings' and continues to fall after 60 days. The kidneys remove harmful substances from the blood, and maintain blood pressure and fluid balance. They also reabsorb essential nutrients and minerals. The loss of 50% of kidney function is like losing one kidney, and although healthy people can usually survive on one kidney, at times of stress it may not be ideal.

In another experiment, where mercury fillings were placed in the teeth of monkeys, it was shown that mercury from the 'silver fillings' dramatically altered the normal bacteria of the gut (16). In their place appeared mercury-resistant strains, which can also be resistant to antibiotics. Exposure to mercury may explain the rise in antibiotic resistant bacteria and the ineffectiveness of antibiotics which is a alarming problem in medicine.

Recent reports implicate mercury in certain brain dysfunctions. Autopsy data from patients who died while suffering from Alzheimer's disease show higher concentrations of mercury in brain areas associated with memory than an age-matched group who did not have Alzheimer's disease (17,18). Others have isolated a biological defect caused by mercury (19) which results in nerve tangles characteristic of Alzheimer's disease.


Scientific conclusions

In general

  1. Mercury vapour is an extremely dangerous poison.
  2. There is no absolutely safe level of mercury vapour exposure in humans.
  3. 'Silver' dental fillings contain 50% mercury.


  • Mercury is released continuously from 'silver' dental fillings.
  • 'Silver' dental fillings release a pharmacologically significant daily dose of mercury in humans, as shown by the work of Dr. Richardson on the risk assessment of amalgam fillings commissioned by the Canadian government.
  • 'Silver' dental fillings are the largest source of mercury exposure in the general population, as shown in Environmental Health Criteria 101:Methylmercury (WHO 1990 ) outlined earlier.
  • Mercury from 'silver fillings' collects in all the adult tissues of the body, with the highest concentration being in the liver and kidneys.
  • During pregnancy, mercury from 'silver' dental fillings crosses the placenta and collects in the developing baby, with the highest concentrations being in the liver and kidneys.
  • Mercury from 'silver' dental fillings reduces kidney function.
  • Mercury from 'silver' dental fillings alters the normal bacterial population in the gut, producing antibiotic resistance.
  • Mercury has been implicated in Alzheimer's disease, and the likely source is 'silver' dental fillings.

Scientific evidence overwhelmingly confronts the unsupported opinion of the dental profession.

The issue of the safety of 'silver fillings' is no longer open to debate.


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Stewart J. Wright, Holistic Dental Practitioner, Shore Street Dental Surgery, Cawdor Place, Shore Street, Oban PA34 4LQ

01631 563006