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Prevalence and morphometric analysis of three-rooted mandibular first molars in a Brazilian subpopulation.
J Appl Oral Sci 2016 Sep-Oct; 24(5):535-542JA

Abstract

Objectives:

To determine the prevalence of three-rooted mandibular molars in a Brazilian population using cone beam computed tomography (CBCT) and to analyze the anatomy of mandibular first molars with three roots through micro-CT.

Material and Methods:

CBCT images of 116 patients were reviewed to determine the prevalence of three-rooted first mandibular molars in a Brazilian subpopulation. Furthermore, with the use of micro-CT, 55 extracted three-rooted mandibular first molars were scanned and reconstructed to assess root length, distance between canal orifices, apical diameter, Vertucci's classification, presence of apical delta, number of foramina and furcations, lateral and accessory canals. The distance between the orifice on the pulp chamber floor and the beginning of the curvature and the angle of canal curvature were analyzed in the distolingual root. Data were compared using the Kruskal-Wallis test (α=0.05).

Results:

The prevalence of three-rooted mandibular first molars was of 2.58%. Mesial roots showed complex distribution of the root canal system in comparison to the distal roots. The median of major diameters of mesiobuccal, mesiolingual and single mesial canals were: 0.34, 0.41 and 0.60 mm, respectively. The higher values of major diameters were found in the distobuccal canals (0.56 mm) and the lower diameters in the distolingual canals (0.29 mm). The lowest orifice distance was found between the mesial canals (MB-ML) and the highest distance between the distal root canals (DB-DL). Almost all distal roots had one root canal and one apical foramen with few accessory canals.

Conclusions:

Distolingual root generally has short length, severe curvature and a single root canal with low apical diameter.

Authors+Show Affiliations

Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil.Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Estomatologia, Saúde Coletiva e Odontologia Legal, Ribeirão Preto, SP, Brasil.Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil.Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil.Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil.Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil.Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, SP, Brasil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27812625

Citation

Rodrigues, Clarissa Teles, et al. "Prevalence and Morphometric Analysis of Three-rooted Mandibular First Molars in a Brazilian Subpopulation." Journal of Applied Oral Science : Revista FOB, vol. 24, no. 5, 2016, pp. 535-542.
Rodrigues CT, Oliveira-Santos C, Bernardineli N, et al. Prevalence and morphometric analysis of three-rooted mandibular first molars in a Brazilian subpopulation. J Appl Oral Sci. 2016;24(5):535-542.
Rodrigues, C. T., Oliveira-Santos, C., Bernardineli, N., Duarte, M. A., Bramante, C. M., Minotti-Bonfante, P. G., & Ordinola-Zapata, R. (2016). Prevalence and morphometric analysis of three-rooted mandibular first molars in a Brazilian subpopulation. Journal of Applied Oral Science : Revista FOB, 24(5), pp. 535-542. doi:10.1590/1678-775720150511.
Rodrigues CT, et al. Prevalence and Morphometric Analysis of Three-rooted Mandibular First Molars in a Brazilian Subpopulation. J Appl Oral Sci. 2016;24(5):535-542. PubMed PMID: 27812625.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prevalence and morphometric analysis of three-rooted mandibular first molars in a Brazilian subpopulation. AU - Rodrigues,Clarissa Teles, AU - Oliveira-Santos,Christiano de, AU - Bernardineli,Norberti, AU - Duarte,Marco Antonio Hungaro, AU - Bramante,Clovis Monteiro, AU - Minotti-Bonfante,Paloma Gagliardi, AU - Ordinola-Zapata,Ronald, PY - 2015/10/26/received PY - 2016/05/30/accepted PY - 2016/11/5/pubmed PY - 2016/12/23/medline PY - 2016/11/5/entrez SP - 535 EP - 542 JF - Journal of applied oral science : revista FOB JO - J Appl Oral Sci VL - 24 IS - 5 N2 - Objectives:: To determine the prevalence of three-rooted mandibular molars in a Brazilian population using cone beam computed tomography (CBCT) and to analyze the anatomy of mandibular first molars with three roots through micro-CT. Material and Methods:: CBCT images of 116 patients were reviewed to determine the prevalence of three-rooted first mandibular molars in a Brazilian subpopulation. Furthermore, with the use of micro-CT, 55 extracted three-rooted mandibular first molars were scanned and reconstructed to assess root length, distance between canal orifices, apical diameter, Vertucci's classification, presence of apical delta, number of foramina and furcations, lateral and accessory canals. The distance between the orifice on the pulp chamber floor and the beginning of the curvature and the angle of canal curvature were analyzed in the distolingual root. Data were compared using the Kruskal-Wallis test (α=0.05). Results:: The prevalence of three-rooted mandibular first molars was of 2.58%. Mesial roots showed complex distribution of the root canal system in comparison to the distal roots. The median of major diameters of mesiobuccal, mesiolingual and single mesial canals were: 0.34, 0.41 and 0.60 mm, respectively. The higher values of major diameters were found in the distobuccal canals (0.56 mm) and the lower diameters in the distolingual canals (0.29 mm). The lowest orifice distance was found between the mesial canals (MB-ML) and the highest distance between the distal root canals (DB-DL). Almost all distal roots had one root canal and one apical foramen with few accessory canals. Conclusions:: Distolingual root generally has short length, severe curvature and a single root canal with low apical diameter. SN - 1678-7765 UR - https://www.unboundmedicine.com/medline/citation/27812625/Prevalence_and_morphometric_analysis_of_three_rooted_mandibular_first_molars_in_a_Brazilian_subpopulation_ L2 - http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572016000500535&lng=en&nrm=iso&tlng=en DB - PRIME DP - Unbound Medicine ER -