Dental Health and Tooth Fillings
Are Amalgam-Type Fillings Safe?
Over the past several years, concerns have been raised about silver-colored fillings, otherwise called amalgam fillings. Because these fillings contain the toxic substance mercury, some people think they are responsible for causing a number of diseases, including autism, Alzheimer's disease, and multiple sclerosis.
The American Dental Association (ADA), the FDA, and numerous public health agencies say there's no proof that dental fillings cause harm to consumers. The causes of autism, Alzheimer's disease, and multiple sclerosis remain unknown. Additionally, there is no solid, scientific evidence to back up the claim that if a person has amalgam fillings removed, he or she will be cured of these or any other diseases.
Although amalgams do contain mercury, when they are mixed with other metals, such as silver, copper, tin, and zinc, they form a stable alloy that dentists have used for more than 100 years to fill and preserve hundreds of millions of decayed teeth.
In June 2008, the FDA said, "Dental amalgams contain mercury, which may have neurotoxic effects on the nervous systems of developing children and fetuses."
And there's more. "Pregnant women and persons who may have a health condition that makes them more sensitive to mercury exposure, including individuals with existing high levels of mercury bioburden, should not avoid seeking dental care, but should discuss options with their health practitioner," according to the FDA.
The changes come in response to a lawsuit filed by consumer groups and individuals concerned about mercury exposure. To settle the suit, the FDA agreed to update its web site.
How Should I Care for My Teeth With Fillings?
To maintain fillings, you should follow good oral hygiene practices -- visiting your dentist regularly for cleanings, brushing with a fluoride toothpaste, and flossing at least once daily. If your dentist suspects that a filling might be cracked or is "leaking" (when the sides of the filling don't fit tightly against the tooth, this allows debris and saliva to seep down between the filling and the tooth, which can lead to decay), he or she will take X-rays to assess the situation. If your tooth is extremely sensitive, if you feel a sharp edge, if you notice a crack in the filling, or if a piece of the filling is missing, call your dentist for an appointment.