Results: Endodontic retreatment is a non-surgical procedure that involves the removal of previous filling materials, followed by cleaning, shaping and filling the canals. Apicoectomy involves surgical treatment of a tooth with a periapical lesion that cannot be resolved by routine endodontic treatment. Autotransplantation is the repositioning of an autogenous tooth at another site to replace teeth. Intentional replantation involves purposefully removing a compromised tooth and replanting the tooth in its socket.

Conclusion: The first choice when dental treatment fails is non-surgical retreatment, which will allow the previously treated canal to be cleaned and better results to be obtained. Intentional reimplantation, although not the most appropriate treatment, has been shown to be successful and is considered one of the last treatment options.