Fig. 1

Preoperative photos and radiographs of the dens invaginatus (#31): Clinical photographs show that the mandibular left central incisor (white arrow) was under eruption with coronal anomaly; the clinical crown was slightly larger than the crown of the contralateral tooth (a and b; labial and incisal views, respectively). (c) Panoramic radiograph showing the mandibular dental arch containing the normal number of teeth. (d) Periapical radiograph showing an invagination surrounded by a radiopaque enamel border into the pulp chamber associated with periapical radiolucency and incomplete root formation