A cavity is a hole in the tooth that is caused by bacteria that feed on the sugars in food and drinks. These bacteria produce acids that dissolve the tooth enamel, creating a cavity. Cavities can be prevented by brushing and flossing regularly, and by avoiding sugary foods and drinks.
If a cavity is not treated, it can lead to pain, infection, and even tooth loss. Treating a cavity involves removing the decayed tooth material and filling the hole with a filling. Fillings can be made of a variety of materials, including gold, silver, porcelain, and composite resin.