Endodontic treatment of dens invaginatus: a 5-year follow-up.

Dens invaginatus is an anomaly of the tooth formation of embryonic origin that presents itself in several morphologic types. The complex anatomy of these teeth makes nonsurgical endodontic treatment complex and more so when its apex is immature. The 2 cases reported illustrate the nonsurgical endodontic management of a dens invaginatus type II and type III with an immature apex and periapical lesions, in which mineral trioxide aggregate (MTA) in one case, and calcium hydroxide in the other one, were the materials used. A 5-year follow-up of both cases shows a complete periapical healing with bone formation at the site of the lesions.