Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population

Purpose. Supernumerary roots in permanent mandibular molar teeth make endodontic treatment more complicated. The aim of this study was to determine the prevalence of Radix Entomolaris (RE) in permanent mandibular first and second molars in the population of Kerman, in the southeast of Iran. Material...

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Main Authors: Maryam Kuzekanani, Laurence J. Walsh, Jahangir Haghani, Ali Zeynali Kermani
Format: Article
Language:English
Published: Hindawi Limited 2017-01-01
Series:International Journal of Dentistry
Online Access:http://dx.doi.org/10.1155/2017/9364963
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spelling doaj-90264e84213c41c69234c4cf31919e802020-11-24T23:02:46ZengHindawi LimitedInternational Journal of Dentistry1687-87281687-87362017-01-01201710.1155/2017/93649639364963Radix Entomolaris in the Mandibular Molar Teeth of an Iranian PopulationMaryam Kuzekanani0Laurence J. Walsh1Jahangir Haghani2Ali Zeynali Kermani3Endodontology Research Center, School of Dentistry, Kerman University of Medical Sciences & Health Services, Kerman, IranUQ Oral Health Centre, School of Dentistry, University of Queensland, Herston, QLD, AustraliaEndodontology Research Center, School of Dentistry, Kerman University of Medical Sciences & Health Services, Kerman, IranEndodontology Research Center, School of Dentistry, Kerman University of Medical Sciences & Health Services, Kerman, IranPurpose. Supernumerary roots in permanent mandibular molar teeth make endodontic treatment more complicated. The aim of this study was to determine the prevalence of Radix Entomolaris (RE) in permanent mandibular first and second molars in the population of Kerman, in the southeast of Iran. Materials and Methods. From a collection of 500 mandibular first and second molar teeth extracted over 2015-2016 at dental clinics in Kerman, teeth were scored for an additional distolingual root, and the average root length and root morphology of this extra root were determined using the De Moor classification scheme. Results. In this population, RE occurred in 6% of mandibular first molars (4% with a straight apex (Type I) and 2% with buccal apical curvature (Type III)). In all cases, RE was the shortest root, with an average root length of 18.37 mm. RE occurred in only 0.8% of mandibular second molars, with an average root length of 18.0 mm. All mandibular second molars with RE were of Type III. Fisher’s exact test showed that the difference in frequency between first and second molars was statistically significant (two-sided P=0.002). Conclusion. Radix Entomolaris occurs more frequently in mandibular first molars than in mandibular second molars in this sample of 500 mandibular molars. The reported rate of 6% in first molars is expected to be higher than reported rates in European or Caucasian populations where the prevalence is typically less than 2%.http://dx.doi.org/10.1155/2017/9364963
collection DOAJ
language English
format Article
sources DOAJ
author Maryam Kuzekanani
Laurence J. Walsh
Jahangir Haghani
Ali Zeynali Kermani
spellingShingle Maryam Kuzekanani
Laurence J. Walsh
Jahangir Haghani
Ali Zeynali Kermani
Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population
International Journal of Dentistry
author_facet Maryam Kuzekanani
Laurence J. Walsh
Jahangir Haghani
Ali Zeynali Kermani
author_sort Maryam Kuzekanani
title Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population
title_short Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population
title_full Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population
title_fullStr Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population
title_full_unstemmed Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population
title_sort radix entomolaris in the mandibular molar teeth of an iranian population
publisher Hindawi Limited
series International Journal of Dentistry
issn 1687-8728
1687-8736
publishDate 2017-01-01
description Purpose. Supernumerary roots in permanent mandibular molar teeth make endodontic treatment more complicated. The aim of this study was to determine the prevalence of Radix Entomolaris (RE) in permanent mandibular first and second molars in the population of Kerman, in the southeast of Iran. Materials and Methods. From a collection of 500 mandibular first and second molar teeth extracted over 2015-2016 at dental clinics in Kerman, teeth were scored for an additional distolingual root, and the average root length and root morphology of this extra root were determined using the De Moor classification scheme. Results. In this population, RE occurred in 6% of mandibular first molars (4% with a straight apex (Type I) and 2% with buccal apical curvature (Type III)). In all cases, RE was the shortest root, with an average root length of 18.37 mm. RE occurred in only 0.8% of mandibular second molars, with an average root length of 18.0 mm. All mandibular second molars with RE were of Type III. Fisher’s exact test showed that the difference in frequency between first and second molars was statistically significant (two-sided P=0.002). Conclusion. Radix Entomolaris occurs more frequently in mandibular first molars than in mandibular second molars in this sample of 500 mandibular molars. The reported rate of 6% in first molars is expected to be higher than reported rates in European or Caucasian populations where the prevalence is typically less than 2%.
url http://dx.doi.org/10.1155/2017/9364963
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