CBCT study of mandibular first molars with a distolingual root in Koreans

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%.

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Radix Entomolaris in Mandibular First Molars in Indian Population: A Review and Case Reports

Case Reports in Dentistry ◽

10.1155/2012/595494 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Kanika Attam ◽

Ruchika Roongta Nawal ◽

Shivani Utneja ◽

Sangeeta Talwar

Keyword(s):

Root Morphology ◽

Indian Population ◽

Case Reports ◽

Accurate Diagnosis ◽

Mandibular Molars ◽

Distolingual Root ◽

Instruments And Techniques ◽

Characteristic Features

Purpose. The aim of this paper is to present cases of mandibular first molars with an additional distolingual root and their management using appropriate instruments and techniques.Basic Procedures and Main Findings. Mandibular molars can sometimes present a variation called radix entomolaris, wherein the tooth has an extra root attached to its lingual aspect. This additional root may complicate the endodontic management of the tooth if it is misdiagnosed or maltreated. This paper reviews the prevalence of such cases in Indian population and reports the management of 6 such teeth.Principal Conclusions. (1) It is crucial to be familiar with variations in tooth/canal anatomy and characteristic features since such knowledge can aid location and negotiation of canals, as well as their subsequent management. (2) Accurate diagnosis and careful application of clinical endodontic skill can favorably alter the prognosis of mandibular molars with this root morphology.

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Cone-Beam Computed Tomography Study of Incidence of Distolingual Root and Distance from Distolingual Canal to Buccal Cortical Bone of Mandibular First Molars in a Korean Population

Journal of Endodontics ◽

10.1016/j.joen.2011.10.023 ◽

2012 ◽

Vol 38 (3) ◽

pp. 301-304 ◽

Cited By ~ 13

Author(s):

Sin-Young Kim ◽

Sung-Eun Yang

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Korean Population ◽

Cone Beam ◽

Distolingual Root ◽

Distolingual Canal

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Morphological changes in the crown of mandibular molars with an additional distolingual root

Archives of Oral Biology ◽

10.1016/j.archoralbio.2012.07.015 ◽

2013 ◽

Vol 58 (3) ◽

pp. 248-253 ◽

Cited By ~ 10

Author(s):

Ki Rim Kim ◽

Je Seon Song ◽

Seong-Oh Kim ◽

Seung Hye Kim ◽

Wonse Park ◽

...

Keyword(s):

Morphological Changes ◽

Mandibular Molars ◽

Distolingual Root

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The Presence of Distolingual Root in Mandibular First Molars Is Correlated with Complicated Root Canal Morphology of Mandibular Central Incisors: A Cone-beam Computed Tomographic Study in a Taiwanese Population

Journal of Endodontics ◽

10.1016/j.joen.2018.01.005 ◽

2018 ◽

Vol 44 (5) ◽

pp. 711-716.e1 ◽

Cited By ~ 4

Author(s):

Yu-Chiao Wu ◽

Wan-Chien Cheng ◽

Pei-Wei Weng ◽

Ming-Pang Chung ◽

Chi-Chun Su ◽

...

Keyword(s):

Root Canal ◽

Cone Beam ◽

Taiwanese Population ◽

Computed Tomographic ◽

Distolingual Root ◽

Root Canal Morphology ◽

Canal Morphology

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The Radix Entomolaris: management of the distolingual root canal

Giornale Italiano di Endodonzia ◽

10.1016/j.gien.2016.09.007 ◽

2016 ◽

Vol 30 (2) ◽

pp. 120-123

Author(s):

Sarah Abrami

Keyword(s):

Root Canal ◽

Distolingual Root

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Frequency and variation of three-rooted lower first permanent molars in precontact Easter Islanders and in Pre-Conquest Peruvians

Dental Anthropology Journal ◽

10.26575/daj.v22i2.89 ◽

2018 ◽

Vol 22 (2) ◽

pp. 33-38

Author(s):

Andrea G. Drusini ◽

Daris R. Swindler

Keyword(s):

Genetic Bottleneck ◽

Easter Island ◽

Rapa Nui ◽

The Past ◽

Distolingual Root ◽

Permanent Molars ◽

Mosaic Distribution ◽

Very High ◽

First Permanent Molars ◽

Insular Populations

The purpose of this study was to evaluate the prevalence of mandibular first molars featuring a distolingual root in two archeological collections. A total of 172 teeth from Pre-Contact Easter Islanders and 281 teeth from three Pre-Conquest Peruvian sites were examined looking for the presence of three-rooted lower first permanent molars (3RLM1). The Easter Island teeth were recovered during the Ahu Tongariki excavation Project 1993-2001: we identified 70 M1s, 62 M2s and 40 M3s. The sample contained 20 lower molars with an extra root, meaning that there is 29% with 3RLM1. The Peruvian teeth are from three archeological sites: Nasca (Proyecto Nasca, n = 100), Arequipa (Proyecto Condesuyos, n = 28), and Tablada de Lurín (Proyecto Loma de Lesix, n = 153). We found 8% of 3RLM1 at Nasca, 1.2% at Tablada de Lurín, and 9% at Condesuyos (total frequency = 6%). The percentage of 3RLM1 in Easter Island, very high compared to the whole Polynesia and the Peruvian sample, shows the effect of a genetic bottleneck (accidental reduction of a population), which the settlers went through as they reached the island they named Rapa Nui. We conclude that founder effect and genetic drift have played an important role in regulating the past and present mosaic distribution of 3RLM1 in insular populations.

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Contemporary Approach in Successful Endodontic Intervention in ‘Radix Entomolaris’

World Journal of Dentistry ◽

10.5005/jp-journals-10015-1233 ◽

2013 ◽

Vol 4 (3) ◽

pp. 208-213 ◽

Cited By ~ 2

Author(s):

Sharad R Kokate ◽

Ajinkya M Pawar ◽

Vibha R Hegde

Keyword(s):

Root Canal ◽

Three Dimensional ◽

Successful Outcome ◽

Chemical Cleaning ◽

Distolingual Root ◽

Root Canal Morphology ◽

Contemporary Management ◽

Mechanical Shaping ◽

Canal Morphology ◽

Contemporary Approach

ABSTRACT The main objective of successful endodontic therapy is thorough mechanical shaping and chemical cleaning of the entire root canal system followed by three-dimensional obturation. Variation of the root canal morphology especially in multirooted teeth is a constant challenge for diagnosis and successful endodontic therapy. Mandibular molars can have an additional root located lingually (the radix entomolaris) or buccally (the radix paramolaris). An awareness and understanding of presence of additional root and unusual root canal morphology is essential as it determines the successful outcome of endodontic treatment. The present article focuses on the identification, access cavity modification and contemporary management of the distolingual root of mandibular 1st molars. How to cite this article Pawar AM, Kokate SR, Hegde VR. Contemporary Approach in Successful Endodontic Intervention in ‘Radix Entomolaris’. World J Dent 2013;4(3):208-213.

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