Endodontic tooth treatment implies the removal of the contents from the tooth root canal, colloquially known as root canal procedure. Patients report strong and persistent pain that does not go away or reacts poorly to pain relievers, feelings of pulsation, or sleep-disrupting pain. The therapy implies the removal of the contents by special instruments and the application of medicines, all ending within a maximum of 3 visits. The goal of the therapy is to remove the infection, to restore the tooth’s function and avoid extraction.