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Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars

BACKGROUND: This study aimed to evaluate the influence of the presence of the third molars on the thickness and height of the buccal cortical bone of the first and second mandibular molars. MATERIAL AND METHODS: The retrospective cross-sectional observational sample consisted of 102 CBCTs of patient...

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Autores principales: Pinheiro, Paulo-Márcio-de Mendonça, Freitas, Karina-Maria-Salvatore, de Castro, Renata-Cristina-Faria-Ribeiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medicina Oral S.L. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306385/
https://www.ncbi.nlm.nih.gov/pubmed/37388434
http://dx.doi.org/10.4317/jced.60428
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author Pinheiro, Paulo-Márcio-de Mendonça
Freitas, Karina-Maria-Salvatore
de Castro, Renata-Cristina-Faria-Ribeiro
author_facet Pinheiro, Paulo-Márcio-de Mendonça
Freitas, Karina-Maria-Salvatore
de Castro, Renata-Cristina-Faria-Ribeiro
author_sort Pinheiro, Paulo-Márcio-de Mendonça
collection PubMed
description BACKGROUND: This study aimed to evaluate the influence of the presence of the third molars on the thickness and height of the buccal cortical bone of the first and second mandibular molars. MATERIAL AND METHODS: The retrospective cross-sectional observational sample consisted of 102 CBCTs of patients (mean age of 29 years), divided into two groups: G1: 51 patients (26 female; 25 male, mean age of 26 years) presenting the mandibular third molars and G2: 51 patients (26 female; 25 male, mean age of 32 years) with the absence of the mandibular third molars. The total and the cortical depth were evaluated at 4 and 6mm from the cementoenamel junction (CEJ). The total thickness of the buccal bone was evaluated in two horizontal reference lines located apically 6 mm and 11 mm from the CEJ. Statistical comparisons were performed with Mann Whitney and Wilcoxon tests. RESULTS: In the comparison of buccal bone thickness and height between the groups, there was a statistical difference in tooth 36. In tooth 37 there was a statistical difference in the mesial root. For tooth 47, there was a statistical difference for the total thickness at 6mm, 11mm and 4mm. Concerning age, there was a tendency to decrease the values of these variables with increasing age. CONCLUSIONS: The mean values for buccal bone thickness, total and cortical depth of the mandibular molars were higher for patients with mandibular third molars because the buccal bone thickness of the mandibular molars increased in the posterior and apical direction. Key words:Molar tooth, jaw, bone, orthodontic anchorage procedures, cone-beam computed tomography.
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spelling pubmed-103063852023-06-29 Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars Pinheiro, Paulo-Márcio-de Mendonça Freitas, Karina-Maria-Salvatore de Castro, Renata-Cristina-Faria-Ribeiro J Clin Exp Dent Research BACKGROUND: This study aimed to evaluate the influence of the presence of the third molars on the thickness and height of the buccal cortical bone of the first and second mandibular molars. MATERIAL AND METHODS: The retrospective cross-sectional observational sample consisted of 102 CBCTs of patients (mean age of 29 years), divided into two groups: G1: 51 patients (26 female; 25 male, mean age of 26 years) presenting the mandibular third molars and G2: 51 patients (26 female; 25 male, mean age of 32 years) with the absence of the mandibular third molars. The total and the cortical depth were evaluated at 4 and 6mm from the cementoenamel junction (CEJ). The total thickness of the buccal bone was evaluated in two horizontal reference lines located apically 6 mm and 11 mm from the CEJ. Statistical comparisons were performed with Mann Whitney and Wilcoxon tests. RESULTS: In the comparison of buccal bone thickness and height between the groups, there was a statistical difference in tooth 36. In tooth 37 there was a statistical difference in the mesial root. For tooth 47, there was a statistical difference for the total thickness at 6mm, 11mm and 4mm. Concerning age, there was a tendency to decrease the values of these variables with increasing age. CONCLUSIONS: The mean values for buccal bone thickness, total and cortical depth of the mandibular molars were higher for patients with mandibular third molars because the buccal bone thickness of the mandibular molars increased in the posterior and apical direction. Key words:Molar tooth, jaw, bone, orthodontic anchorage procedures, cone-beam computed tomography. Medicina Oral S.L. 2023-06-01 /pmc/articles/PMC10306385/ /pubmed/37388434 http://dx.doi.org/10.4317/jced.60428 Text en Copyright: © 2023 Medicina Oral S.L. https://creativecommons.org/licenses/by/2.5/This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Pinheiro, Paulo-Márcio-de Mendonça
Freitas, Karina-Maria-Salvatore
de Castro, Renata-Cristina-Faria-Ribeiro
Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
title Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
title_full Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
title_fullStr Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
title_full_unstemmed Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
title_short Influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
title_sort influence of the third molar presence on the thickness and height of the buccal cortical bone of the mandibular first and second molars
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306385/
https://www.ncbi.nlm.nih.gov/pubmed/37388434
http://dx.doi.org/10.4317/jced.60428
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