title: A C-Shaped Canal in a Maxillary Second Molar: Prexion 3D Cone-Beam Computed Tomography Analysis.
abstract: The aim of this study was to present an atypical case of a C-shaped root canal that was present in the vestibular root of a permanent maxillary second molar using PreXion 3-D cone-beam computed tomography (CBCT) as a diagnostic device.
  
  
  
  A 50-year-old female patient was referred for routine examination to a private diagnostic imaging clinic in Recife-Pernambuco. During the physical examination, the presence of an unusual C-shaped anatomy in the vestibular canal with a mesiodistal interconnection that extended from the apical to the cervical third was detected in axial slices acquired with a PreXion 3-D scanner.
  
  
  
  Although C-shaped root canals are most frequently observed in the mandibular second molar, this case presented a rare finding in the permanent maxillary second molar.
  
  
  
  PreXion 3-D CBCT has emerged as a new high-resolution imaging test technology, thus assisting with the diagnosis of anatomical variations such as C-shaped root canals. However, such imaging technology is not recommended for routine use.
authors.affiliation: - PhD student Integrated Clinic. Substitute Professor in the Department of Dental Prosthodontics and Oral Maxillofacial Surgery, Federal University of Pernambuco, Recife - PE - Brazil.
authors.forename: Daniela Siqueira
authors.initials: DS
authors.lastname: Lopes
authors.affiliation: - Adjunct Professor in the Department of Dental Prosthodontics and Oral Maxillofacial Surgery, Federal University of Pernambuco, Recife - PE - Brazil .
authors.forename: Andréa Cruz
authors.initials: AC
authors.lastname: Câmara
authors.affiliation: - Adjunct Professor in the Department of Dental Prosthodontics and Oral Maxillofacial Surgery, Federal University of Pernambuco, Recife - PE - Brazil .
authors.forename: Carlos Menezes
authors.initials: CM
authors.lastname: Aguiar
authors.affiliation: - Doctor in Odontological Radiology.
authors.forename: Monikelly do Carmo Chagas
authors.initials: MD
authors.lastname: do Nascimento
authors.affiliation: - State University of Pernambuco, Recife, Brazil.
authors.forename: Luciane
authors.initials: L
authors.lastname: Farias de Araújo
keywords: ConeBeam Computed Tomography; Dental Pulp Cavity; Tooth Abnormalities; Tooth Root