One of the most frequently used dental restorations for repairing cavities is called a filling. There are two basic types of filings, silver fillings that consist of a mixture of different types of metal and tooth colored fillings. How and where these fillings are applied varies with the need of the person. Dental decay can occur on the smooth areas of the teeth as well as the biting surface. The location of the cavity plays an important role in what type of filling will be used to repair it. Before beginning treatment the dentist will usually administer some type of local anesthetic to make sure you are comfortable. The area of decay is then removed from the tooth and the resulting hole is filled with the appropriate material. Your dentist will recommend which type of filling best suits your needs.