Situations where root canal treatment is not successful => Canal clogged, persistent infection, teeth that do not heal even though root canal treatment has been renewed, presence of extra canals that cannot be reached in root canals, teeth that cannot be treated with normal means, etc.

* Situations where the patient cannot comply with root canal treatment sessions for various reasons.

* Cases where the broken part can be removed and the tooth can be saved in fractures of the last third of the tooth root as a result of trauma

* Situations in which biopsy should be taken from the lesion at the root of the tooth

* It is applied to primary teeth that have not formed permanent teeth, but have lesions in the root.

* Root canal treatment failures of unknown cause => In this case, failure in apical resection is also possible. First, the cause of the failure must be determined. anatomical differences, stubborn bacteria, etc., it is necessary to approach according to the cause.

* If traditional root canal treatment can be done, priority is root canal treatment.

Performing root canal treatment and apical resection together => In a root canal treatment performed for the first time, only root canal treatment or canal treatment with resection, apical resection has no advantage over only root canal treatment.

* Locations of anatomical formations

* If the root of the tooth is short, it will cause trouble, especially if the teeth are already loose.

* Not applicable in cases such as systemic diseases.