Extraction of an ectopic supernumerary tooth through nasal cavity with piezosurgery under local anesthesia: a case reportConsent statement: Written informed consent was obtained from the patient to publish this report in accordance with the journal’s patient consent policyAilimaierdan Ainiwaer，Bumairemu Yiminjiang ,Wang Ling**Correspondence: Wang Ling Email: [email protected][Abstract] The ectopic supernumerary teeth (ST) commonly occur in the oral cavity. We are reporting a case of a 23-year-old female patient with one ectopic ST in the anterior region of the maxilla. We extracted the ectopic ST under local tissue anesthesia through the nasal cavity using piezosurgery and minimally invasive extraction tools. During the operation, the adjacent structures remained intact, and the patient experienced mild pain. This case indicates that ectopic ST in the maxilla can be extracted not only through an intraoral approach but also through a nasal approach.[Key words ] Nasal cavity; Ectopic Supernumerary Teeth；Nasal Approach; Piezosurgery；Local anesthesia；Fund program :This research was funded by Youth Research Launch Project of the First Affiliated Hospital of Xinjiang Medical University (Grant No .2022YFY-QKQN-33)