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C-shaped canals in first and second mandibular molars from Brazilian individuals: A prevalence study using cone-beam computed tomography.
PLoS One. 2019; 14(2):e0211948.Plos

Abstract

INTRODUCTION

The study aimed to evaluate, through in vivo tomographic analysis, the prevalence of C-shaped canals in mandibular first and second molars of Brazilian individuals, analyzing its frequency by thirds of the roots, and in contralateral teeth.

METHODS

Images of 801 mandibular molars (379 first molars and 422 second molars) from 334 Brazilian individuals (142 men and 192 women) were identified through 1544 cone beam computed tomography (CBCT) exams, obtained from a private oral radiologic clinic. The cross-sectional configurations were analyzed to determine the frequency of C-shaped canals at three different axial levels and classified in categories by three experienced endodontists independently.

RESULTS

The incidence of C-shaped canals was 181 (23%). Considering the type of tooth, 91 (24.01%) were identified in the first molars, and 90 (21.32%) were found in the second molars. The incidence was significantly higher in female individuals (P < 0.05) for both first and second molars. The most common C-shaped canal configurations were: C1 (89.01% for first molars and 90% second molars), followed by C2 (8.79% for first molars and 6.66% for second molars) and C4 (2.19% for the first molars and 3.33% for the second molars). Bilateral C-shaped canals were significantly higher than unilateral for both first and second molars (P < 0.01).

CONCLUSIONS

The prevalence of C-shaped canals in mandibular molars of the Brazilian individuals was higher than previously reported for both mandibular first (24.01%) and second molars (21.32%). The incidence was significantly higher in female individuals and the coronal portion of the roots. The classic C-shaped format "C1" was the most frequent anatomical configuration. Furthermore, the prevalence of bilateral C-shaped canals was higher for the first molar (61.70%) and lower for the second molar (38.29%).

Authors+Show Affiliations

Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.Independent researcher, Radiology specialist, Private Oral Radiology Clinic, Rio de Janeiro, RJ, Brazil.Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30759126

Citation

Vaz de Azevedo, Katia R., et al. "C-shaped Canals in First and Second Mandibular Molars From Brazilian Individuals: a Prevalence Study Using Cone-beam Computed Tomography." PloS One, vol. 14, no. 2, 2019, pp. e0211948.
Vaz de Azevedo KR, Lopes CB, Andrade RHTLR, et al. C-shaped canals in first and second mandibular molars from Brazilian individuals: A prevalence study using cone-beam computed tomography. PLoS ONE. 2019;14(2):e0211948.
Vaz de Azevedo, K. R., Lopes, C. B., Andrade, R. H. T. L. R., Pacheco da Costa, F. F. N., Gonçalves, L. S., Medeiros Dos Santos, R., & Alves, F. R. F. (2019). C-shaped canals in first and second mandibular molars from Brazilian individuals: A prevalence study using cone-beam computed tomography. PloS One, 14(2), e0211948. https://doi.org/10.1371/journal.pone.0211948
Vaz de Azevedo KR, et al. C-shaped Canals in First and Second Mandibular Molars From Brazilian Individuals: a Prevalence Study Using Cone-beam Computed Tomography. PLoS ONE. 2019;14(2):e0211948. PubMed PMID: 30759126.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - C-shaped canals in first and second mandibular molars from Brazilian individuals: A prevalence study using cone-beam computed tomography. AU - Vaz de Azevedo,Katia R, AU - Lopes,Cristiane B, AU - Andrade,Rosana H T L R, AU - Pacheco da Costa,Fernanda F N, AU - Gonçalves,Lúcio S, AU - Medeiros Dos Santos,Rachel, AU - Alves,Flávio R F, Y1 - 2019/02/13/ PY - 2018/08/05/received PY - 2019/01/24/accepted PY - 2019/2/14/entrez PY - 2019/2/14/pubmed PY - 2019/11/27/medline SP - e0211948 EP - e0211948 JF - PloS one JO - PLoS ONE VL - 14 IS - 2 N2 - INTRODUCTION: The study aimed to evaluate, through in vivo tomographic analysis, the prevalence of C-shaped canals in mandibular first and second molars of Brazilian individuals, analyzing its frequency by thirds of the roots, and in contralateral teeth. METHODS: Images of 801 mandibular molars (379 first molars and 422 second molars) from 334 Brazilian individuals (142 men and 192 women) were identified through 1544 cone beam computed tomography (CBCT) exams, obtained from a private oral radiologic clinic. The cross-sectional configurations were analyzed to determine the frequency of C-shaped canals at three different axial levels and classified in categories by three experienced endodontists independently. RESULTS: The incidence of C-shaped canals was 181 (23%). Considering the type of tooth, 91 (24.01%) were identified in the first molars, and 90 (21.32%) were found in the second molars. The incidence was significantly higher in female individuals (P < 0.05) for both first and second molars. The most common C-shaped canal configurations were: C1 (89.01% for first molars and 90% second molars), followed by C2 (8.79% for first molars and 6.66% for second molars) and C4 (2.19% for the first molars and 3.33% for the second molars). Bilateral C-shaped canals were significantly higher than unilateral for both first and second molars (P < 0.01). CONCLUSIONS: The prevalence of C-shaped canals in mandibular molars of the Brazilian individuals was higher than previously reported for both mandibular first (24.01%) and second molars (21.32%). The incidence was significantly higher in female individuals and the coronal portion of the roots. The classic C-shaped format "C1" was the most frequent anatomical configuration. Furthermore, the prevalence of bilateral C-shaped canals was higher for the first molar (61.70%) and lower for the second molar (38.29%). SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/30759126/C_shaped_canals_in_first_and_second_mandibular_molars_from_Brazilian_individuals:_A_prevalence_study_using_cone_beam_computed_tomography_ L2 - http://dx.plos.org/10.1371/journal.pone.0211948 DB - PRIME DP - Unbound Medicine ER -