Fillings are a method that restores the function and appearance of a tooth or teeth damaged by decay. Your dentist will remove the decayed tooth tissue before filling. They will clean the affected area and try to prevent bacteria from entering and causing decay again by filling the gap with filling material. Your dentist will decide on the filling. When you go for an examination, your dentist can determine whether or not you need a filling. A small mirror is used during the dental examination. Anything seen abnormally is controlled with the help of a special device. Your dentist may want to take a radiograph of a part of your mouth if necessary. The extent of the damage caused by the decay varies depending on the selected treatment by the dentist.