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Case Reports in Dentistry
Volume 2013, Article ID 797286, 5 pages
Case Report

Artefacts in Cone Beam CT Mimicking an Extrapalatal Canal of Root-Filled Maxillary Molar

1Department of Dentistry, State University of Montes Claros, Avenue Rui Braga s/n, 39401-089 Montes Claros, MG, Brazil
2Department of Dentistry, School of Dentistry, Federal University of Sergipe, Rua Cláudio Batista s/n, 49060-100 Aracaju, SE, Brazil
3Department of Restorative Dentistry, Faculty of Dentistry, University of São Paulo, Avenue Bandeirantes 3900, 14040-900 Ribeirão Preto, SP, Brazil

Received 13 February 2013; Accepted 12 March 2013

Academic Editors: C. Evans and M. Manfredi

Copyright © 2013 Carla Cristina Camilo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Despite the advantages of cone-beam computed tomography (CBCT), the images provided by this diagnostic tool can produce artifacts and compromise accurate diagnostic assessment. This paper describes an endodontic treatment of a maxillary molar where CBCT images suggested the presence of a nonexistent third root canal in the palatal root. An endodontic treatment was performed in a first maxillary molar with palatal canals, and the tooth was restored with a cast metal crown. The patient returned four years later presenting with a discomfort in chewing, which was reduced after occlusal adjustment. CBCT was prescribed to verify additional diagnostic information. Axial scans on coronal, middle, and apical palatal root sections showed images similar to a third root canal. However, sagittal scans demonstrated that these images were artifacts caused by root canal fillings. A careful interpretation of CBCT images in root-filled teeth must be done to avoid mistakes in treatment.