A case of multiple supernumerary teeth developed from the third dental laminas

Abstract

Supernumerary teeth are seen frequently, but the multiple, and generalized ones, are relatively rare. A 13-year-old male consulted us because he had no eruption of permanent teeth except for lower incisor teeth and an upper first molar. At the age of nine, his systemic disease of cleidocranial dysplasia was diagnosed by his school doctor. Radiographically by us, a surprisingly excessive number of teeth were impacted in the both jaws: 28 permanent teeth and 18 supernumerary teeth. The latter were seen in the regions of the front teeth and the premolar, and each tooth was paired to permanent ones and resembled them in shape and size. It is our opinion that these supernumerary teeth might be developed from the third dental laminas.