Progressive dental caries cause inflammation in the pulp and root tip of the tooth as a result of reaching the pulp tissue of the tooth. Endodontics treats root-end infections caused by inflammation of decayed teeth, and it is possible to protect teeth whose pulp has been damaged due to trauma and similar reasons, with root canal treatment. Root canal treatment is usually in a single session, but in advanced cases, it can take 23 sessions. It is beneficial to check the teeth with root canal treatment every 6 months.