Fillings are to treat a cavity by removing decayed portion of the tooth and then fill the area on the tooth where the decayed material was removed. Fillings are also used to repair cracked or broken teeth and teeth that have been worn down from misuse (such as from nail biting or tooth grinding)

There are different types of Fillings available

Gold:
Gold Fillings are sturdy and non-corrosive; they can last up to 15 years. Many people find gold fillings more aesthetically pleasing than silver fillings. But gold fillings can cost as much as 10 times more than silver amalgam fillings, and it takes more than one office visit to fit them properly

Silver Amalgam:
Silver Amalgam fillings offer strength and durability similar to gold at lower cost, but many people don’t like the look of them. Also, Amalgam fillings can be more prone to expansion and contraction and thus they are more likely to cause a tooth to crack compared with other filling materials

Composite:
Fillings made of a tooth-colored composite are popular because the color can be matched to your teeth. Composite fillings are not as durable as metal fillings and they may need to be replaced after five years, compared with 10 or 15 years for metal fillings. They are more expensive than amalgam fillings, although not as expensive as gold fillings

Ceramic:
Ceramic fillings are often made of porcelain. They are durable and aesthetically pleasing, but they wear opposing teeth if the porcelain becomes rough

Glass Ionomers:
These glass and acrylic fillings usually last less than five years, but they are often a good choice for children whose teeth are still changing. Also, they can release fluoride, which can help prevent tooth decay