International Session 1　　Nasal Surgery

Radicular cysts can develop as a result of advanced dental caries progressing to apical periodontitis.Traditionally, treatment for radicular cysts involved tooth extraction and cyst enucleation if conservative treatment failed.However, recent advancements in medical devices, such as navigation systems and drills, along with improved surgical techniques, have enabled the enucleation of cysts and apical root resection via endoscopic sinus surgery(ESS) .Consequently, tooth preservation has become a viable option even in cases of radicular cysts.This study investigated the clinical outcomes of ESS for the treatment of radicular cysts at our institution.Thirteen patients who underwent ESS for radicular cysts between 2019 and 2024 were included.In all cases, the cyst was identified using a navigation system, followed by cyst enucleation and, if necessary, apical root resection.Postoperatively, tooth preservation was achieved in 11 cases, while 2 cases required tooth extraction.The characteristics and clinical courses of these cases are reported with a review of the relevant literature.