Fillings are used to treat a small hole, or cavity in a tooth.Dental Filling is a treatment modality to restore missing tooth structure which could have been a result of decay or trauma. Decay makes tooth hollow. Today, several dental filling materials are available. Teeth can be filled with 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.If fillings are done at correct stage,Rct can be avoided in future.