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Root morphology of mandibular molars: a cone-beam computed tomography study
, 3, 1, 1, 3, 1
Affiliations- Endodontics Graduate Program, Faculty of Dentistry, San Sebastian University, Bellavista 7, Santiago, Chile
- Faculty of Dentistry, San Sebastian University, Lago Panguipulli 1390, Pelluco Alto, 5480000 Puerto Montt, Chile
- Centre for Research in Epidemiology, Economics and Oral Public Health (CIEESPO), Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile
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Abstract
Background: The aim of the study was to assess the number and anatomical classification of roots and root canals of first and second mandibular molars using cone-beam computed tomography (CBCT) in a Chilean population.
Materials and methods: This study evaluated the CBCT scans of 289 patients aged between 14 and 86 years, obtaining a sample of 1022 mandibular first and second molars. The number of roots and root canals was evaluated according to the anatomical classification proposed by Ahmed in 2016. Data were analysed using Pearson’s chi-squared test and ANOVA.
Results: Nine hundred fifty-one (93.05%) molars had two roots, while the remaining 71 (6.95%) molars had one root. The most frequent root and root canal morphologies found were: 2MM M2 D1 (29.65%), 2MM M2-1 D1 (22.3%) and 2MM M1 D1 (13.4%) (M — mesial, D — distal), with a total of 32 different anatomical distributions. C-shaped canals were present in 56 molars and were more frequently found in women than in men (7.1% vs. 3.88%; p = 0.024).
Conclusions: The analysis of internal anatomy using CBCT revealed a highly variable distribution of root canals. The most frequent morphology found in mandibular molars in a Chilean population was two roots and three canals.
Abstract
Background: The aim of the study was to assess the number and anatomical classification of roots and root canals of first and second mandibular molars using cone-beam computed tomography (CBCT) in a Chilean population.
Materials and methods: This study evaluated the CBCT scans of 289 patients aged between 14 and 86 years, obtaining a sample of 1022 mandibular first and second molars. The number of roots and root canals was evaluated according to the anatomical classification proposed by Ahmed in 2016. Data were analysed using Pearson’s chi-squared test and ANOVA.
Results: Nine hundred fifty-one (93.05%) molars had two roots, while the remaining 71 (6.95%) molars had one root. The most frequent root and root canal morphologies found were: 2MM M2 D1 (29.65%), 2MM M2-1 D1 (22.3%) and 2MM M1 D1 (13.4%) (M — mesial, D — distal), with a total of 32 different anatomical distributions. C-shaped canals were present in 56 molars and were more frequently found in women than in men (7.1% vs. 3.88%; p = 0.024).
Conclusions: The analysis of internal anatomy using CBCT revealed a highly variable distribution of root canals. The most frequent morphology found in mandibular molars in a Chilean population was two roots and three canals.
Keywords
root canal configuration, mandibular molar, C-shaped canal, cone-beam computed tomography, root anatomy
About this articleTitle
Root morphology of mandibular molars: a cone-beam computed tomography study
Journal
Issue
Article type
Original article
Pages
327-332
Published online
2019-07-19
Page views
3123
Article views/downloads
1473
DOI
Pubmed
Bibliographic record
Folia Morphol 2020;79(2):327-332.
Keywords
root canal configuration
mandibular molar
C-shaped canal
cone-beam computed tomography
root anatomy
Authors
J. Abarca
M. Duran
D. Parra
K. Steinfort
C. Zaror
H. Monardes
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