Intraosseous tooth migration of impacted mandibular premolar: Computed tomography observation of 2 cases of migration into the mandibular neck and the coronoid process

Abstract

Intraosseous tooth migration is a rare natural phenomenon that occurs only in mandibular teeth, especially in impacted (unerupted) canines or second premolars.1 It is reported that most tooth migration of a horizontally impacted mandibular canine is recognized as a movement to the mesial direction across the mental symphysis. On the other hand, the second premolar is the most affected tooth that migrates and moves in distal direction. However, they have been observed on panoramic radiography, and there have been only 1 report of the use of computed tomography (CT).2 We report the cases of 2 patients with dramatic intraosseous tooth migration of the impacted mandibular second premolar into the mandibular neck and the coronoid process, together with CT findings.