There are two ways to remove a bad tooth, which is usually a tooth that has decayed on the surface, has a black hole formed, or has a crown that has slowly disappeared and has residual roots remaining. The first is through treatment, after the formation of dental caries, you can take the filling method of treatment. In the case of pulpitis and periapical inflammation, the tooth can also be treated with a root canal as well as a crown restoration. When the crown of a tooth has been removed and the remaining root is left, it can also be treated with root canal therapy, staking, and veneering if there is value in preserving it. Another method is to extract the tooth directly, which is mainly used when the tooth has no preservation value or is not in the normal position, such as multiple teeth or wisdom teeth.