Abstract
A tooth developing at an abnormal position during the course of growth is called an ectopic tooth, and when the ectopic tooth develops in the opposite direction, it is referred to as an inverted tooth. In 1754, Albinus reported the first case of an inverted tooth in the nasal cavity. In Japan, 138 cases have been reported since 1901.
We encountered and surgically treated two patients, a 9-year-old boy and a 13-year-old boy, with an inverted tooth in the nasal cavity. The pathological diagnosis in both cases was an impacted supernumerary tooth associated with amelogenesis inperfecta. In both cases, the inverted tooth was surgically removed by the endonasal procedure using CO2 laser.
Early extraction of the tooth is recommended to prevent epistaxis and rhinolith.
