Dental amalgam, commonly known as “silver fillings,” has been a standard material for cavity fillings in dentistry for over 160 years. It is a mixture composed roughly of 50% elemental mercury combined with other metals such as silver, copper, tin, and zinc. This combination allows the mercury to bind with these metals, creating a durable material used to fill cavities.
Despite their widespread use, silver fillings have raised health concerns due to the mercury content. Research indicates that mercury vapor can be continuously released from these fillings into the mouth air, especially during chewing. This vapor can be inhaled and absorbed by the body, where it is then transformed into ionic mercury and binds to cell proteins in various tissues.
Scientific investigations have shown that dental amalgam is the major source of mercury exposure for many individuals, contributing significantly to the body’s total mercury burden. Studies have examined the potential effects of this exposure on multiple body systems including the immune, renal, reproductive, and central nervous systems as well as on oral and gut bacteria.
Importantly, major health regulatory agencies like the U.S. Food and Drug Administration (FDA) provide information to patients on the benefits and risks of dental amalgam. While the FDA considers dental amalgam a safe and effective treatment for cavities for the general population, they acknowledge that certain groups, such as pregnant women, children, and people with certain allergies or pre-existing conditions, may be advised against its use.
Environmental concerns also exist regarding mercury waste from dental amalgam. The U.S. Environmental Protection Agency (EPA) actively works on reducing mercury pollution linked to dental practices by promoting safer disposal and alternative filling materials.
For those wondering whether silver dental crowns contain mercury, it is important to note that crowns typically do not contain mercury. Crowns are different from fillings as they cover the entire tooth to provide structural support rather than filling a cavity.
If you have silver fillings and are concerned about mercury exposure or toxicity, current research and expert opinions suggest that the amount of mercury released is generally very low and below levels that cause harm. However, anyone with concerns should consult with their dentist or healthcare provider to discuss potential risks and alternative options.
In summary, dental amalgam remains a widely used and effective cavity-filling material with a long history of use. Understanding the role of mercury in these fillings helps patients make informed decisions about their dental care in consultation with their dentists.