Analysis of the Internal and External Morphology of the Mandibular First Molar in a Chilean Sub-Population Using Cone-Beam Computed Tomography

Primer Autor
Matus, D.
Co-autores
Arias, A.
Navarro, P.
Betancourt, P.
Título
Analysis of the Internal and External Morphology of the Mandibular First Molar in a Chilean Sub-Population Using Cone-Beam Computed Tomography
Editorial
SOC CHILENA ANATOMIA
Revista
INTERNATIONAL JOURNAL OF MORPHOLOGY
Lenguaje
en
Resumen
The mandibular first molar (MFM) commonly presents two roots with two canals in the mesial root and one or two canals in the distal root. However, morphological variations have been described in different populations, which must be considered when planning endodontic treatment. The aim of this study was to analyze the internal and external morphology of the MFM in a Chilean sub-population using cone-beam computed tomography (CBCT) images. An in vivo cross-sectional, descriptive, and observational study was conducted using CBCT exams from 351 right and left MFM. The data were analyzed by descriptive statistics using the Chi -Square test for categorical variables, Fisher's exact test, the Mann-Whitney U non-parametric test for two independent samples, and the Wilcoxon non-parametric test for related samples. Of the total sample, 1 root was observed in 2.27 % of the cases, 2 roots in 93.73 %, and 3 roots in 4 %. In relation to the number of canals, 71.23 % of the MFM showed 3 root canals, 16.81 % 4 canals, 9.69 % 2 canals, and 2.28 % 1 canal. Of all the studied cases, 2.3 % had a C-shaped anatomy. In terms of morphology, using Zhang's classification, variant 3 was observed in 71.23 %, variant 4 in 12.82 %, variant 1 in 9.67 %, variant 6 in 4 %, and variant 8 in 2.28 %. In conclusion, the morphology of the MFM is variable in a Chilean sub-population, and these variations must be considered before and during endodontic therapy. CBCT proved to be an effective tool for the in vivo study of tooth morphology.
Fecha Publicación
2023
Tipo de Recurso
artículo original
doi
10.4067/S0717-95022023000401089
Formato Recurso
PDF
Palabras Claves
Mandibular first molar
Root morphology
Cone-beam computed tomography
Endodontics
Ubicación del archivo
Categoría OCDE
Anatomía y Morfología
Materias
Primer molar mandibular
Morfología de la raíz
Tomografía computarizada de haz cónico
Endodoncia
Página de inicio (Recomendado-único)
1089.0
Página final (Recomendado-único)
1094
Identificador del recurso (Mandatado-único)
artículo original
Versión del recurso (Recomendado-único)
versión publicada
Derechos de acceso
acceso abierto
Access Rights
acceso abierto
Id de Web of Science
WOS:001048344800016
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