Double transmigration and hyperdontia.

Transmigrated teeth are rare, though reports have increased with the advent of panoramic radiography. Ectopic eruption of canines and other dental anomalies as retained deciduous teeth and supernumerary teeth have a genetic etiology and may be linked. A case report is presented which exhibits transmigration of both a mandibular canine and lateral incisor as well as the presence of a supplemental premolar and retained deciduous molar roots. The possible etiology of these abnormalities is discussed.