Endodontic treatment of immature maxillary lateral incisor with two canals: type 3 dens invaginatus

Dens invaginatus is a developmental anomaly. The nonsurgical endodontic treatment of a type 3 dens invaginatus with a large periradicular lesion in a maxillary left lateral incisor of a 10-year-old girl is presented. In spite of difficult diagnosis and treatment of type 3 dens invaginatus, nonsurgical treatment was performed successfully. Resolution of the periradicular lesion and apical closure was observed after 1-year follow-up.