When teeth have cavities or are broken, in some cases they can be restored with a simple filling. Fillings have limitations and, in order to be successful, a certain amount of strong tooth is needed to support the dental filling. There are two types of filling materials. One type is a tooth-colored resin material that bonds to the tooth. The other type is a mercury filling that is silver in color. Many dentists today will not use or recommend the mercury-based fillings. You should discuss this with your dentist, Dr. Grace, before the dental filling is placed in your tooth. For more information on dental fillings, we welcome you to contact our Washington, DC dental office soon.