Dental amalgam, commonly referred to as a silver filling, is a mixture of metals that includes mercury. Amalgam fillings have been used for over 150 years to fill cavities and restore damaged teeth. However, due to concerns about the potential health effects of mercury, many countries have banned or restricted the use of amalgam fillings.
Mercury is a toxic metal that can damage the brain and kidneys. In 2009, the US Food and Drug Administration (FDA) issued a ruling that amalgam fillings are safe for use in adults and children over the age of six. However, the FDA also stated that amalgam fillings should not be used in pregnant women or in people with certain medical conditions, such as kidney disease.