Supernumerary teeth and odontomas are relatively common conditions of the maxillofacial region, but it is rare for both to be present in a multiple metachronous form. We report a case of metachronous multiple supernumerary teeth with multiple odontomas in a 10-year-old boy. Because impacted supernumerary teeth were present in the median maxillary region between the right mandibular canines and first premolar and in the left mandibular first premolar region on a panoramic X-ray film, the teeth were extracted. On an X-ray film obtained approximately 3 years after the first examination, impacted supernumerary teeth were seen between the left maxillary incisors and canines, as well as between the right mandibular second premolar and first molar. In addition, an irregular opaque image was observed near the left mandibular second premolar region and right maxillary second premolar region. Tooth extraction and surgical removal were performed. The lesions in the left mandibular second premolar region and the right maxillary second premolar region consisted of tooth-like hard tissue encapsulated in white elastic soft tissue, and a compound odontoma was diagnosed. The disease course was good thereafter, and he is currently under observation as an outpatient.
