Bacteria and their toxins cause dental cavity or hole in the tooth which can result in tooth decay. In some cases tooth decay can be stopped or reversed by dental fillings & restorations .
A Dental filling is a way to restore teeth that are damaged by decay back to their normal function and shape. When any dentist gives the filling, he or she first removes the decayed tooth material, cleans the affected area, and then fills the cleaned out cavity with a specific filling material.
Dentists consider a number of factors when choosing which type of filling material is best for you. These factors include the extent of the repair, where in your mouth the filling is needed and the cost.
They help restoring teeth that are damaged, back to their normal function, and prevents further decay.
If we talk about types of filling materials there is no limit, these days several dental filling materials are available like gold, porcelain, silver amalgam (which consists of mercury mixed with silver, tin, zinc, and copper), or tooth-colored, plastic, and materials called composite resin fillings. There is also a material that contains glass particles and is known as glass ionomer. This material is used in ways similar to the use of composite resin fillings.