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Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal

PURPOSE: The purpose of this study was to detect the anterior loop of the mental nerve and the mandibular incisive canal in panoramic radiographs (PAN) and cone-beam computed tomography (CBCT) images, as well as to determine the anterior/mesial extension of these structures in panoramic and cross-se...

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Autores principales: de Brito, Ana Caroline Ramos, Nejaim, Yuri, de Freitas, Deborah Queiroz, de Oliveira Santos, Christiano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Korean Academy of Oral and Maxillofacial Radiology 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5035720/
https://www.ncbi.nlm.nih.gov/pubmed/27672611
http://dx.doi.org/10.5624/isd.2016.46.3.159
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author de Brito, Ana Caroline Ramos
Nejaim, Yuri
de Freitas, Deborah Queiroz
de Oliveira Santos, Christiano
author_facet de Brito, Ana Caroline Ramos
Nejaim, Yuri
de Freitas, Deborah Queiroz
de Oliveira Santos, Christiano
author_sort de Brito, Ana Caroline Ramos
collection PubMed
description PURPOSE: The purpose of this study was to detect the anterior loop of the mental nerve and the mandibular incisive canal in panoramic radiographs (PAN) and cone-beam computed tomography (CBCT) images, as well as to determine the anterior/mesial extension of these structures in panoramic and cross-sectional reconstructions using PAN and CBCT images. MATERIALS AND METHODS: Images (both PAN and CBCT) from 90 patients were evaluated by 2 independent observers. Detection of the anterior loop and the incisive canal were compared between PAN and CBCT. The anterior/mesial extension of these structures was compared between PAN and both cross-sectional and panoramic CBCT reconstructions. RESULTS: In CBCT, the anterior loop and the incisive canal were observed in 7.7% and 24.4% of the hemimandibles, respectively. In PAN, the anterior loop and the incisive canal were detected in 15% and 5.5% of cases, respectively. PAN presented more difficulties in the visualization of structures. The anterior/mesial extensions ranged from 0.0 mm to 19.0 mm on CBCT. PAN underestimated the measurements by approximately 2.0 mm. CONCLUSION: CBCT appears to be a more reliable imaging modality than PAN for preoperative workups of the anterior mandible. Individual variations in the anterior/mesial extensions of the anterior loop of the mental nerve and the mandibular incisive canal mean that is not prudent to rely on a general safe zone for implant placement or bone surgery in the interforaminal region.
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spelling pubmed-50357202016-09-26 Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal de Brito, Ana Caroline Ramos Nejaim, Yuri de Freitas, Deborah Queiroz de Oliveira Santos, Christiano Imaging Sci Dent Original Article PURPOSE: The purpose of this study was to detect the anterior loop of the mental nerve and the mandibular incisive canal in panoramic radiographs (PAN) and cone-beam computed tomography (CBCT) images, as well as to determine the anterior/mesial extension of these structures in panoramic and cross-sectional reconstructions using PAN and CBCT images. MATERIALS AND METHODS: Images (both PAN and CBCT) from 90 patients were evaluated by 2 independent observers. Detection of the anterior loop and the incisive canal were compared between PAN and CBCT. The anterior/mesial extension of these structures was compared between PAN and both cross-sectional and panoramic CBCT reconstructions. RESULTS: In CBCT, the anterior loop and the incisive canal were observed in 7.7% and 24.4% of the hemimandibles, respectively. In PAN, the anterior loop and the incisive canal were detected in 15% and 5.5% of cases, respectively. PAN presented more difficulties in the visualization of structures. The anterior/mesial extensions ranged from 0.0 mm to 19.0 mm on CBCT. PAN underestimated the measurements by approximately 2.0 mm. CONCLUSION: CBCT appears to be a more reliable imaging modality than PAN for preoperative workups of the anterior mandible. Individual variations in the anterior/mesial extensions of the anterior loop of the mental nerve and the mandibular incisive canal mean that is not prudent to rely on a general safe zone for implant placement or bone surgery in the interforaminal region. Korean Academy of Oral and Maxillofacial Radiology 2016-09 2016-09-20 /pmc/articles/PMC5035720/ /pubmed/27672611 http://dx.doi.org/10.5624/isd.2016.46.3.159 Text en Copyright © 2016 by Korean Academy of Oral and Maxillofacial Radiology http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
de Brito, Ana Caroline Ramos
Nejaim, Yuri
de Freitas, Deborah Queiroz
de Oliveira Santos, Christiano
Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
title Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
title_full Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
title_fullStr Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
title_full_unstemmed Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
title_short Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
title_sort panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5035720/
https://www.ncbi.nlm.nih.gov/pubmed/27672611
http://dx.doi.org/10.5624/isd.2016.46.3.159
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