Abstract: Supernumerary teeth are categorized as the abnormal numerical development of teeth. These teeth are most frequently seen in the maxillary anterior region, but rarely found in the third molar region. This paper reports a rare case of simultaneous horizontal impaction of the mandibular third molar and supernumerary fourth molar, which were successfully extracted under general anesthesia. By combining this case with relevant literature, we aim to discuss the clinical features and treatment options for this condition in order to assist clinicians in diagnosis and management.

Key words: supernumerary teeth, fourth molar, distomolar, third molar, ambulatory ward, general anesthesia