Management of type IIIb dens invaginatus using a combination of root canal treatment, intentional replantation, and surgical therapy: A case report

Figure 1 Preoperative photograph of the left upper anterior teeth. A: Labial view showing an intact left lateral incisor with a sinus on the distobuccal aspect; B: Palatal view showing tooth 22 with an access cavity; C: Radiograph showing the presence of dens invaginatus (DI) associated with a large periapical lesion; D-F: Cone-beam computed tomography images: Transverse view showing radiolucency surrounding tooth 22 (D), coronal view showing a DI extending to the apex of the root (E), and sagittal sections showing DI with a large periapical radiolucency (F); G: Three-dimensional reconstruction indicating loss of labial cortical plate.