The World Health Organization has concluded that dental fillings contribute more mercury to a person’s body than all other sources of mercury combined. Many people do not realize that their dark, “silver” amalgam fillings are 50% mercury. A large filling may contain as much mercury as a thermometer. Mercury vaporizes easily at room temperature and in this state, is odorless, colorless and tasteless. Inhaled mercury vapor is readily absorbed into the bloodstream. No amount of mercury vapor can be considered harmless, especially considering its cumulative effect.


Published research demonstrates that mercury is more toxic than lead, cadmium or arsenic. Due to its poisonous nature, mercury can adversely affect the immune, urinary, cardiac, respiratory and digestive systems. Under laboratory conditions, mercury has produced brain cell deterioration identical to that seen in victims of Alzheimer’s disease. Mercury poisoning has been implicated in immune system depression, multiple sclerosis, depression and chronic fatigue syndrome and autism.


Many European countries have banned or curtailed the use of mercury in dental fillings, but our country lags behind in this decision. Yet although most medical and scientific researchers have called for a ban on the use of mercury in all products, agreeing that it is the most toxic, non-radioactive element on the earth, the U.S. government has continued to ignore the potential harmful effects of mercury fillings.


Biological or holistic dentists recognize the impact of toxic materials and relate it to dental and physiologic health. These dentists are concerned with the integrity of the oral cavity and use materials and procedures in their practices that are systemically compatible. Patients should keep in mind that amalgam is a material that is over 150 years old and there are many modern alternatives that can be considered. To prevent additional mercury exposure biologic and holistic dentists are properly trained in the removal of mercury fillings. Patients should inquire about the following amalgam removal protocols to be certain that the dentist they choose is following the recommended protocols for amalgam removal such as:

Utilizing an effective oral suction system to contain amalgam particles and limit mercury vapors

A rubber dam should isolate and prevent swallowing debris

Operating a vacuum system at optimal efficiency

Applying copious amounts of water to the filling during removal

Removing large portions of the amalgam to minimize particulate and mercury vapor release

Providing a safe source of oxygen for the patient to breath during removal

Having the patient’s hair, face and clothing covered during removal

The Environmental Protection Agency of New Jersey is concerned about mercury and has a treatise on the subject of mercury toxicity; however regarding its use in dentistry, they recommend you ask your dentist. There is an abundance of information available regarding mercury in dentistry. Further information can be found online from the International Academy of Oral Medicine and Toxicology (IAOMT.org) and Toxicteeth.org.