Abstract: In clinical practice,when extracting maxillary low impacted tooth in children in the mixed dentition stage,the traditional approach of flap elevation and bone removal can lead to potential damage to the permanent tooth germs within the maxillary bone. This damage may result in difficulties with permanent tooth eruption or secondary cyst formation. Additionally,due to the limited compliance of children,traditional surgical incisions pose challenges for postoperative oral and wound care, increasing the risk of postoperative infections and complications. Compared to the traditional tooth extraction method, endoscopic-assisted removal of maxillary low impacted tooth in children in the mixed dentition stage offers enhanced safety and efficiency. Moreover, it facilitates easier postoperative care, effectively reducing the risk of postoperative infections. In this paper, we reported a case of endoscopic-assisted removal of an maxillary low inverted impacted tooth with a cyst in a child in the mixed dentition stage, which was jointly performed by the Department of Stomatology, and the Department of Otolaryngology in our hospital. Based on existing literature, the related advantages, operation points and application of nasal endoscope in other oral surgery were summarized.

Key words: Nasal endoscopy, Dental replacement period, Maxillary low inverted impacted tooth, Cyst