A C-Shaped Canal in a Maxillary Second Molar: Prexion 3D Cone-Beam Computed Tomography Analysis

Svrha: Željelo se predstaviti netipičan slučaj C-oblika kanala u vestibularnom korijenu trajnoga maksilarnog kutnjaka, a pritom su korišteni kompjutorizirana 3D tomografija koničnom zrakom (CBCT) i dijagnostički uređaj PreXion. Materijali i metode: Nakon rutinskoga pregleda 50-godišnja pacijentica upućena je u privatnu dijagnostičko-radiološku kliniku u Recife-Pernambucu u Brazilu. Tijekom pregleda uočena je neuobičajena anatomija vestibularnog kanala u obliku velikoga slova C s meziodistalnom anastomozom koja se protezala od apikalne do cervikalne trećine, a otkrivena je aksijalnim rezovima na uređaju PreXion 3D. Rezultati: Premda se C-oblici korijenskih kanala najčešće nalaze u drugim mandibularnim kutnjacima, u ovom radu opisana je rijetka pojava u drugom maksilarnom trajnom molaru. Zaključak: PreXion 3-D CBCT najnoviji je uređaj visoke rezolucije koji pomaže pri postavljanju dijagnoza anatomskih varijacija poput C-oblika korijenskih kanala. Ipak, uporaba takvih sustava prikazivanja ne preporučuje se u rutinskoj uporabi.Objective: 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. Materials and Methods: 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. Results: 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. Conclusions: PreXion 3-D CBCT has emerged as a new highresolution 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

Two-dimensional radiographs versus cone-beam computed tomography in planning mini-implant placement : a systematic review

This study aimed to compare two-dimensional radiographs and cone beam computed tomography (CBCT) images for mini-implant planning. A search was performed in PubMed, Embase, Web of Science, Cochrane Library and Google Scholar electronic databases accord

Association between the root canal configuration, endodontic treatment technical errors, and periapical hypodensities in molar teeth: a cone-beam computed tomographic study

This study aimed to evaluate the association between the root canal configuration (RCC), endodontic technical errors, and periapical hypodensities in molars using cone-beam computed tomographic (CBCT) images. Methods: Two hundred twenty-one roots were assessed from 79 patients referred for CBCT examination because of symptomatology in endodontically treated molars. Two oral and maxillofacial radiologists classified the RCC of each dental root according to Vertucci's classification. Root canals were assessed for the presence of technical errors from endodontic treatment. The presence of periapical hypodensity for each dental root and the coronal sealing condition of each tooth were also recorded. Results: For RCC type I, the most prevalent technical error was underfilling (17.4%). For types II and VIII, nonfilled canals were found in 54% and 100% of the cases, respectively. For type III, underfilling, nonhomogeneous filling, and nonfilled canals were equally frequent (33.3%), whereas for type IV underfilling and nonfilled canals had a prevalence of 42%. In general, there was a higher prevalence of apical hypodensities among roots with technical errors. It was also observed for type I, with an increase from 41.2%-62.9% when a technical error was present. Conclusions: The prevalence of different endodontic technical errors varies depending on the RCC for molars. A greater complexity of RCC is related to a higher occurrence of errors and a higher prevalence of periapical hypodensity451214651471COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESsem informaçã

Influence of basis images and skull position on evaluation of cortical bone thickness in cone beam computed tomography

The aim of this study was to assess the influence of the number of basis images and the orientation of the skull on the evaluation of cortical alveolar bone in cone beam computed tomography (CBCT).publisher: Elsevier articletitle: Influence of basis images and skull position on evaluation of cortical bone thickness in cone beam computed tomography journaltitle: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology articlelink: http://dx.doi.org/10.1016/j.oooo.2017.01.015 content_type: article copyright: © 2017 Elsevier Inc. All rights reserved.status: publishe