Tomografia computadorizada de feixe cônico no diagnóstico de reabsorção radicular externa em dentes permanentes reimplantados: uma investigação em vivo

Abstract

Cone Beam Computed Tomography in the diagnosis of external root resorption in replanted permanent teeth: - an in vivo investigation The progressive external inflammatory root resorptions (IERR) and substitution (RERR) represent the most frequent sequelae in permanent teeth replanted or that suffered intrusive dislocations. The clinical examination, including the signs and symptoms and the complementary exams, highlighting the radiographic examinations are determining factors for the diagnosis. Periapical radiography (PR) is the complementary exam of choice for follow-up in RRE cases, however, two-dimensional images show overlaps of anatomical structures. In order to overcome the limitations presented by conventional radiographs, multiplanar images have been widely used, particularly concomitant computed tomography. The objective of the present study was to make a evaluation of the performance of CBCT and periapical radiographs for the diagnosis of different types of posttraumatic RRE at different stages. The sample consisted of 29 patients, with 39 superior incisors reimplanted after avulsion. Periapical radiographs and CBCT performed on the same day were independently examined by 2 evaluators in order to identify the presence, type and extent of root resorption in both examinations. Mild and inflammatory resorptions were more frequently identified by CBCT while moderate to severe resorptions and by replacement in periapical radiographs. It can be concluded that only one radiographic technique is not sufficient for the diagnosis of all types and severity of RER, so CBCT is important to complement periapical examination, especially in the early stages. Key words: Root resorption. Computed tomography. Cone-beam computed tomography. Diagnosis imaging. Tooth replantation.