Over recent years, concerns have been raised about the safety of silver-coloured fillings, otherwise known as amalgams. This is because amalgams contain mercury, a toxic substance that is harmful to the human body. However, the mercury levels in amalgams are extremely low, and when combined with other metals, such as silver, tin, copper and zinc, they form a very stable alloy. When people consume sea food, they ingest more mercury into their bodies than in amalgam fillings. Ultimately, the best dental filling is no dental filling. Prevention is the best medicine. The best tooth is what you are born with. You can dramatically decrease your risk of cavities and other dental diseases simply by Brushing your teeth twice a day with fluoride tooth paste. Flossing your teeth Eating Balance Diet Visiting the Dentist Regularly