To treat a cavity your dentist will remove the 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).
After reviewing your medical history to determine whether there are any contraindications to dental treatment a dentist (or possibly a dental hygienist) will usually numb the area of the mouth where the dental filling will be placed by administering an anesthetic. The type of anesthetic will be chosen according to the level and length of anesthesia necessary for the procedure. Once you are numb the damaged tooth structure will be removed by a dentist until only healthy tooth structure remains