We report a case with seven supernumerary teeth. The patient was a 29-year-old man, who visited the Department of Oral and Maxillofacial Surgery, Tokyo Dental College, for a medical examination of supernumerary teeth. The dental panoramic radiograph and CT scan showed seven supernumerary teeth located from both sides of the mandibular canine to the premolar region （three）, and on both sides of the maxillary third molar region （four）. The supernumerary teeth were extracted under local anesthesia and general anesthesia. The supernumerary tooth extracted from the maxilla was a microdont and presented an eternal tooth form as well as an almost similar form with the lower jaw. In addition, the tooth showed a graft organization of supernumerary teeth, as observed by an optical microscope and a soft X-ray photograph; the presented teeth-like structure and observations made were suggested after birth. No supernumerary teeth were identified during the 1.5-year follow-up of the patient after the surgical extraction.
