Use of Cone Beam Computed Tomography in Endodontics
Figure 15
Replacement external resorption associated with root canal filled right maxillary central incisor. An oblique multiplanar reformatted “panoramic” image (a) shows the dentition with minimal restorations and a single root canal filled maxillary right central incisor; note that the obturation is large in relation to the width of the adjacent left maxillary central suggesting endodontic treatment at an early age. Sequential 1 mm cross-sectional (b) and parasagittal (c) images show bone trabecular-like replacement of the superior and palatal aspects of the root indicative of replacement resorption. Initial management consisted of conventional endodontic treatment. Because of the questionable long-term prognosis of the apical resorptive lesions, periodic CBCT imaging is recommended with a view towards surgical revision therapy consisting of apicoectomy and retrograde root canal treatment (data acquired on an iCAT, Imaging Sciences International, Hatfield, PA USA at 0.4 mm resolution and reformatted using InVivo Dental, Anatomage, San Jose, CA).
