Explain the Treatment Options after Endodontic Failure
a) Non-surgical retreatment "re-endo",
b) Root-end surgery "if there is a will detected mistake as separated instrument",
c) Extraction,
d) Intentional reimplantation. E.g. if there is an external resorption, we should extract the tooth and do the management externally then we reimplanted once again. "has limited prognosis".