Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study

Analyze the morphological characteristics of fourth molars from non-syndromic patients using computed microtomography (microCT). Five human fourth molars (case group) and other three third molars (control group) were obtain from Biobank of UFPR Dentistry School. The teeth were submitted to macroscop...

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Main Authors: Ana Clélia Roussenq Baracho, Eun Sol Cho, Nayara Ramos de Almeida Torres, Thiago Gomes da Silva
Format: Article
Language:English
Published: Instituto Paulista de Estudos Bioéticos e Jurídicos 2020-09-01
Series:Brazilian Journal of Forensic Sciences, Medical Law and Bioethics
Subjects:
Online Access:https://www.ipebj.com.br/bjfs/index.php/bjfs/article/view/805
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spelling doaj-329ea60c46e146f788a15b05917b20c92020-11-25T03:18:18ZengInstituto Paulista de Estudos Bioéticos e JurídicosBrazilian Journal of Forensic Sciences, Medical Law and Bioethics2237-261X2020-09-019410.17063/bjfs9(4)y2020570-581Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot StudyAna Clélia Roussenq BarachoEun Sol ChoNayara Ramos de Almeida TorresThiago Gomes da SilvaAnalyze the morphological characteristics of fourth molars from non-syndromic patients using computed microtomography (microCT). Five human fourth molars (case group) and other three third molars (control group) were obtain from Biobank of UFPR Dentistry School. The teeth were submitted to macroscopic and microCT analysis. Sample characteristics: 60% of the teeth from the lower arch, mainly from the right lower arch (40%). The results showed that eighty percent of the teeth were impacted and all of them presented normal morphology. The microCT revealed that one of the fourth molars had hypercementosis. Concerning the root canal anatomy, all of the fourth molars studied had just one principal root canal. Four teeth had one collateral canal that ended at the lateral face of the root. The volume average of root canal, dentine and enamel were respectively 9.27 mm3, 122.64 mm3 and 74.71 mm3. The averages between these variables in third molars were 46.98 mm3, 473.25 mm3 and 198.34 mm3, respectively. Proportionally, the volume of the fourth molars was five times less than the third molars, but the dentine and enamel volume were, respectively, 3.8 and 2.7 times less than third molars. The fourth molar teeth usually showed only one principal root canal and it can be associated with other alterations, such as hypercementosis. Although the fourth molars were smaller, the proportion of enamel volume is bigger than third molar in comparison.https://www.ipebj.com.br/bjfs/index.php/bjfs/article/view/805Supernumerary toothFourth molarHyperdontiaX-Ray MicrotomographyForensics
collection DOAJ
language English
format Article
sources DOAJ
author Ana Clélia Roussenq Baracho
Eun Sol Cho
Nayara Ramos de Almeida Torres
Thiago Gomes da Silva
spellingShingle Ana Clélia Roussenq Baracho
Eun Sol Cho
Nayara Ramos de Almeida Torres
Thiago Gomes da Silva
Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study
Brazilian Journal of Forensic Sciences, Medical Law and Bioethics
Supernumerary tooth
Fourth molar
Hyperdontia
X-Ray Microtomography
Forensics
author_facet Ana Clélia Roussenq Baracho
Eun Sol Cho
Nayara Ramos de Almeida Torres
Thiago Gomes da Silva
author_sort Ana Clélia Roussenq Baracho
title Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study
title_short Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study
title_full Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study
title_fullStr Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study
title_full_unstemmed Morphology Analysis of Human Fourth Molars Using Computed Microtomography - Pilot Study
title_sort morphology analysis of human fourth molars using computed microtomography - pilot study
publisher Instituto Paulista de Estudos Bioéticos e Jurídicos
series Brazilian Journal of Forensic Sciences, Medical Law and Bioethics
issn 2237-261X
publishDate 2020-09-01
description Analyze the morphological characteristics of fourth molars from non-syndromic patients using computed microtomography (microCT). Five human fourth molars (case group) and other three third molars (control group) were obtain from Biobank of UFPR Dentistry School. The teeth were submitted to macroscopic and microCT analysis. Sample characteristics: 60% of the teeth from the lower arch, mainly from the right lower arch (40%). The results showed that eighty percent of the teeth were impacted and all of them presented normal morphology. The microCT revealed that one of the fourth molars had hypercementosis. Concerning the root canal anatomy, all of the fourth molars studied had just one principal root canal. Four teeth had one collateral canal that ended at the lateral face of the root. The volume average of root canal, dentine and enamel were respectively 9.27 mm3, 122.64 mm3 and 74.71 mm3. The averages between these variables in third molars were 46.98 mm3, 473.25 mm3 and 198.34 mm3, respectively. Proportionally, the volume of the fourth molars was five times less than the third molars, but the dentine and enamel volume were, respectively, 3.8 and 2.7 times less than third molars. The fourth molar teeth usually showed only one principal root canal and it can be associated with other alterations, such as hypercementosis. Although the fourth molars were smaller, the proportion of enamel volume is bigger than third molar in comparison.
topic Supernumerary tooth
Fourth molar
Hyperdontia
X-Ray Microtomography
Forensics
url https://www.ipebj.com.br/bjfs/index.php/bjfs/article/view/805
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