A filling is a common procedure to restore a tooth damaged by decay. Fillings also help to repair broken, worn-down or cracked teeth.
Some modern, simple fillings do not even require numbing. However, when they do, the dentist first makes sure the tooth is adequately numb so that the procedure can be completed painlessly. Then, he removes all decay from the affected area and “fills” the hole with tooth-colored filling material. This restores the tooth shape and protects it from further destruction by the bacteria that normally are present in the mouth in huge amounts.