Dental amalgam is a durable material commonly used for filling cavities caused by tooth decay. It is made from a mixture of metals, including silver, tin, copper, and mercury. The combination creates a strong and long-lasting filling that can withstand the pressure of chewing. This material has been used in dentistry for over 150 years and is known for its effectiveness and affordability. While some people have concerns about the mercury content, numerous studies have shown that dental amalgam is safe for most patients. It remains a popular choice among dentists for restoring teeth.