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Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography

BACKGROUND/PURPOSE: Anatomical features of the lingual undercut region is a potential factor that might increase the risk of displacement of a tooth or fragment. The aim of this study was to report the normal anatomical relationship of impacted lower third molar roots to the lingual cortex and soft...

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Autores principales: Aktop, Sertac, Atalı, Onur, Borahan, Oguz, Gocmen, Gokhan, Garip, Hasan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Association for Dental Sciences of the Republic of China 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6399996/
https://www.ncbi.nlm.nih.gov/pubmed/30895060
http://dx.doi.org/10.1016/j.jds.2016.12.005
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author Aktop, Sertac
Atalı, Onur
Borahan, Oguz
Gocmen, Gokhan
Garip, Hasan
author_facet Aktop, Sertac
Atalı, Onur
Borahan, Oguz
Gocmen, Gokhan
Garip, Hasan
author_sort Aktop, Sertac
collection PubMed
description BACKGROUND/PURPOSE: Anatomical features of the lingual undercut region is a potential factor that might increase the risk of displacement of a tooth or fragment. The aim of this study was to report the normal anatomical relationship of impacted lower third molar roots to the lingual cortex and soft tissues of mandible and anatomical variations of lingual balcony in the impacted third molar region. MATERIALS AND METHODS: One hundred impacted third molars (54 males, 46 females) from 65 (31 men, 34 women) patients were evaluated for this study using cone-beam computed tomography. Three measurements [bone thickness, angle (Ang) 1 and Ang 2] were recorded on the coronal section slices of cone-beam computed tomography images; in these images, the impacted third molar root was closest to the lingual soft tissues. RESULTS: The average distance between the tooth root and the lingual outer cortical bone layer (bone thickness) was 1.03 mm. The averages of Ang 1 and Ang 2 were 140.61° and 153.44°. Ang 1 and Ang 2 of female patients were larger than those of male patients. CONCLUSION: The narrow angulation of the lingual balcony region and the relationship between roots and lingual soft tissues should be noted to avoid undesirable complication of displacement of a tooth or fragment into sublingual, submandibular, and pterygomandibular spaces. There was no relation in the floor of the mouth between the position of the impacted third molar roots and different lingual undercut angulation variations.
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spelling pubmed-63999962019-03-20 Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography Aktop, Sertac Atalı, Onur Borahan, Oguz Gocmen, Gokhan Garip, Hasan J Dent Sci Original Article BACKGROUND/PURPOSE: Anatomical features of the lingual undercut region is a potential factor that might increase the risk of displacement of a tooth or fragment. The aim of this study was to report the normal anatomical relationship of impacted lower third molar roots to the lingual cortex and soft tissues of mandible and anatomical variations of lingual balcony in the impacted third molar region. MATERIALS AND METHODS: One hundred impacted third molars (54 males, 46 females) from 65 (31 men, 34 women) patients were evaluated for this study using cone-beam computed tomography. Three measurements [bone thickness, angle (Ang) 1 and Ang 2] were recorded on the coronal section slices of cone-beam computed tomography images; in these images, the impacted third molar root was closest to the lingual soft tissues. RESULTS: The average distance between the tooth root and the lingual outer cortical bone layer (bone thickness) was 1.03 mm. The averages of Ang 1 and Ang 2 were 140.61° and 153.44°. Ang 1 and Ang 2 of female patients were larger than those of male patients. CONCLUSION: The narrow angulation of the lingual balcony region and the relationship between roots and lingual soft tissues should be noted to avoid undesirable complication of displacement of a tooth or fragment into sublingual, submandibular, and pterygomandibular spaces. There was no relation in the floor of the mouth between the position of the impacted third molar roots and different lingual undercut angulation variations. Association for Dental Sciences of the Republic of China 2017-09 2017-04-25 /pmc/articles/PMC6399996/ /pubmed/30895060 http://dx.doi.org/10.1016/j.jds.2016.12.005 Text en © 2017 Association for Dental Sciences of the Republic of China. Publishing services by Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Article
Aktop, Sertac
Atalı, Onur
Borahan, Oguz
Gocmen, Gokhan
Garip, Hasan
Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
title Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
title_full Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
title_fullStr Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
title_full_unstemmed Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
title_short Analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
title_sort analyses of anatomical relationship between mandibular third molar roots and variations in lingual undercut of mandible using cone-beam computed tomography
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6399996/
https://www.ncbi.nlm.nih.gov/pubmed/30895060
http://dx.doi.org/10.1016/j.jds.2016.12.005
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