Endodontic-root canal treatment is the treatment of inflamed tooth pulp. Diagnostics in this case is the most important. Taking an X-ray image will allow you to familiarize yourself with the course of the root canals and to identify the possible presence of periapical changes. The second stage is the selection and implementation of local anesthesia. Then the dentist performs the preparation of the canals, i.e. the complete removal of the pulp (nerve) from the root canal and all kinds of bacterial toxins from the adjacent dentinal tubules. The channels are drained and filled. The final stage of treatment is filling the tooth with a filling, i.e. a composite material.