Dental Health and Cavities
How Are They Treated? continued...
Crowns are used when a tooth is so badly decayed that not much of it remains. Your dentist removes and repairs the damaged part. He fits a crown made from gold, porcelain, or porcelain fused to metal over the rest of the tooth.
You might need a root canal if the root or pulp of your tooth is dead. The dentist removes the nerve, blood vessels, and tissue along with the decayed portions of the tooth. He fills in the roots with a sealing material. You may need a crown over the filled tooth.