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Morphology and prevalence of middle canals in the mandibular molars: A systematic review

OBJECTIVES: The purpose of this paper is to systematically review the various studies and case reports on the morphology and prevalence of middle canals in the mandibular molars. METHODOLOGY: Electronic databases such as MEDLINE, PubMed, EBSCOhost, ScienceDirect and various journals were screened to...

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Autores principales: Bansal, Rashmi, Hegde, Sapna, Astekar, Madhusudan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6097385/
https://www.ncbi.nlm.nih.gov/pubmed/30158775
http://dx.doi.org/10.4103/jomfp.JOMFP_194_17
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author Bansal, Rashmi
Hegde, Sapna
Astekar, Madhusudan
author_facet Bansal, Rashmi
Hegde, Sapna
Astekar, Madhusudan
author_sort Bansal, Rashmi
collection PubMed
description OBJECTIVES: The purpose of this paper is to systematically review the various studies and case reports on the morphology and prevalence of middle canals in the mandibular molars. METHODOLOGY: Electronic databases such as MEDLINE, PubMed, EBSCOhost, ScienceDirect and various journals were screened to identify published literature till March 2017 and earlier for articles related to middle canals in the human permanent mandibular molars. Obtained articles were categorized as original researches, case reports and review articles. Well-defined review questions were developed using the patient population, intervention, comparison and outcome framework to summarize the objectives: “Does middle canal vary in morphology and anatomic location? What is the prevalence of middle canals in mandibular molars? Does ethnicity affect the prevalence of middle canals in mandibular molars?” Morphology was studied and prevalence rates were determined from the evaluation of data extracted from the articles. RESULTS: The search strategy resulted in 87 articles, of which 36 were original research papers and 51 were case reports. The prevalence of middle canals in the various populations ranged from 0.26% to 53.8%. Middle canals were reported in Europeans, Asians, Africans and South and North American populations. The prevalence of middle mesial canal and middle distal canal in various races was reported as up to 53.8% and 10%, respectively. The orifice of middle canal exists below a dentinal projection in the groove between the two main canals. They were observed in fin, confluent and independent configuration. Out of these, confluent configuration was more prevalent. CONCLUSION: Middle canal varies in morphology and anatomic location. Ethnicity affects the prevalence of middle canals in the mandibular molars.
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spelling pubmed-60973852018-08-29 Morphology and prevalence of middle canals in the mandibular molars: A systematic review Bansal, Rashmi Hegde, Sapna Astekar, Madhusudan J Oral Maxillofac Pathol Original Article OBJECTIVES: The purpose of this paper is to systematically review the various studies and case reports on the morphology and prevalence of middle canals in the mandibular molars. METHODOLOGY: Electronic databases such as MEDLINE, PubMed, EBSCOhost, ScienceDirect and various journals were screened to identify published literature till March 2017 and earlier for articles related to middle canals in the human permanent mandibular molars. Obtained articles were categorized as original researches, case reports and review articles. Well-defined review questions were developed using the patient population, intervention, comparison and outcome framework to summarize the objectives: “Does middle canal vary in morphology and anatomic location? What is the prevalence of middle canals in mandibular molars? Does ethnicity affect the prevalence of middle canals in mandibular molars?” Morphology was studied and prevalence rates were determined from the evaluation of data extracted from the articles. RESULTS: The search strategy resulted in 87 articles, of which 36 were original research papers and 51 were case reports. The prevalence of middle canals in the various populations ranged from 0.26% to 53.8%. Middle canals were reported in Europeans, Asians, Africans and South and North American populations. The prevalence of middle mesial canal and middle distal canal in various races was reported as up to 53.8% and 10%, respectively. The orifice of middle canal exists below a dentinal projection in the groove between the two main canals. They were observed in fin, confluent and independent configuration. Out of these, confluent configuration was more prevalent. CONCLUSION: Middle canal varies in morphology and anatomic location. Ethnicity affects the prevalence of middle canals in the mandibular molars. Medknow Publications & Media Pvt Ltd 2018 /pmc/articles/PMC6097385/ /pubmed/30158775 http://dx.doi.org/10.4103/jomfp.JOMFP_194_17 Text en Copyright: © 2018 Journal of Oral and Maxillofacial Pathology http://creativecommons.org/licenses/by-nc-sa/4.0 This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Bansal, Rashmi
Hegde, Sapna
Astekar, Madhusudan
Morphology and prevalence of middle canals in the mandibular molars: A systematic review
title Morphology and prevalence of middle canals in the mandibular molars: A systematic review
title_full Morphology and prevalence of middle canals in the mandibular molars: A systematic review
title_fullStr Morphology and prevalence of middle canals in the mandibular molars: A systematic review
title_full_unstemmed Morphology and prevalence of middle canals in the mandibular molars: A systematic review
title_short Morphology and prevalence of middle canals in the mandibular molars: A systematic review
title_sort morphology and prevalence of middle canals in the mandibular molars: a systematic review
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6097385/
https://www.ncbi.nlm.nih.gov/pubmed/30158775
http://dx.doi.org/10.4103/jomfp.JOMFP_194_17
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