Fig. 1

Preoperative clinical view and radiographs of the dens invaginatus (#31and #41): Clinical view shows that the bilateral mandibular central incisors were under eruption with coronal anomaly. (A and B; labial and incisal views, respectively). C The mandibular dental arch panoramic radiograph including the normal number of teeth and anatomical aberration (#31and #41). D Periapical radiograph showing a type III DI extending from the pulp chamber throughout to the apical foramen linked to periapical radiolucency and incomplete root formation