Restorative Dentistry & Endodontics

Research Article

The prevalence of radix molaris in the mandibular first molars of a Saudi subpopulation based on cone-beam computed tomography: Hassan AL-Alawi, Saad Al-Nazhan, Nassr Al-Maflehi, Mazen A. Aldosimani, Mohammed Nabil Zahid, Ghadeer N. Shihabi; Restor Dent Endod 2020;45(1):e1. Published online November 14, 2019; DOI: https://doi.org/10.5395/rde.2020.45.e1

Objectives

The purpose of this study was to determine the incidence of radix molaris (RM) (entomolaris and paramolaris) in the mandibular first permanent molars of a sample Saudi Arabian subpopulation using cone-beam computed tomography (CBCT).

Materials and Methods

A total of 884 CBCT images of 427 male and 457 female Saudi citizens (age 16 to 70 years) were collected from the radiology department archives of 4 dental centers. A total of 450 CBCT images of 741 mature mandibular first molars that met the inclusion criteria were reviewed. The images were viewed at high resolution by 3 examiners and were analyzed with Planmeca Romexis software (version 5.2).

Results

Thirty-three (4.5%) mandibular first permanent molars had RM, mostly on the distal side. The incidence of radix entomolaris (EM) was 4.3%, while that of radix paramolaris was 0.3%. The RM roots had one canal and occurred more unilaterally. No significant difference in root configuration was found between males and females (p > 0.05). Types I and III EM root canal configurations were most common, while type B was the only RP configuration observed.

Conclusions

The incidence of RM in the mandibular first molars of this Saudi subpopulation was 4.5%. Identification of the supernumerary root can avoid missing the canal associated with the root during root canal treatment.

Citations

Citations to this article as recorded by

Evaluation of the variations of mandibular molars and the distance from root apex to the inferior alveolar nerve in Saudi Sub-population: Three-dimensional radiographic evaluation
Tariq Mohammed Aqili, Esam Sami Almuzaini, Abdulbari Saleh Aljohani, Ahmed Khaled Al Saeedi, Hassan Abdulmuti Hammudah, Muath Alassaf, Muhannad M. Hakeem, Mohmed Isaqali Karobari
PLOS ONE.2025; 20(2): e0317053. CrossRef
Assessment of the root and canal morphology in the permanent dentition of Saudi Arabian population using cone beam computed and micro-computed tomography – a systematic review
Mohammed Mustafa, Rumesa Batul, Mohmed Isaqali Karobari, Hadi Mohammed Alamri, Abdulaziz Abdulwahed, Ahmed A. Almokhatieb, Qamar Hashem, Abdullah Alsakaker, Mohammad Khursheed Alam, Hany Mohamed Aly Ahmed
BMC Oral Health.2024;[Epub] CrossRef
Prevalence of radix accesoria dentis in a northern Peruvian population evaluated by cone-beam tomography
Karla Renata León-Almanza, Anthony Adrián Jaramillo-Nuñez, Catherin Angélica Ruiz-Cisneros, Paul Martín Herrera-Plasencia
Heliyon.2024; 10(16): e35919. CrossRef
Radix molaris is a hidden truth of mandibular first permanent molars: A descriptive- analytic study using cone beam computed tomography
Mohammed A. Alobaid, Saurabh Chaturvedi, Ebtihal Mobarak S. Alshahrani, Ebtsam M. Alshehri, Amal S. Shaiban, Mohamed Khaled Addas, Giuseppe Minervini
Technology and Health Care.2023; 31(5): 1957. CrossRef
Prevalence of Radix Entomolaris in Mandibular Permanent Molars Analyzed by Cone-Beam CT in the Saudi Population of Ha'il Province
Moazzy I Almansour, Ahmed A Madfa, Adhwaa F Algharbi, Reem Almuslumani, Noeer K Alshammari, Ghufran M Al Hussain
Cureus.2023;[Epub] CrossRef
Prevalence of radix entomolaris in India and its comparison with the rest of the world
Sumit MOHAN, Jyoti THAKUR
Minerva Dental and Oral Science.2022;[Epub] CrossRef
Radix Paramolaris an Endodontic Challenge: A Case Report
Ashwini B Prasad, Deepak Raisingani, Ridhima Gupta, Rimjhim Jain
Journal of Mahatma Gandhi University of Medical Sciences and Technology.2022; 7(1): 32. CrossRef
Evaluation of Radix Entomolaris and Middle Mesial Canal in Mandibular Permanent First Molars in an Iraqi Subpopulation Using Cone‐Beam Computed Tomography
Ranjdar Mahmood Talabani, Kazhan Omer Abdalrahman, Rawa Jamal Abdul, Dlsoz Omer Babarasul, Sara Hilmi Kazzaz, Heng Bo Jiang
BioMed Research International.2022;[Epub] CrossRef
Evaluation of Root Canal Configuration of Maxillary and Mandibular First Molar by CBCT: A Retrospective Cross-Sectional Study
Rakan Rafdan Alhujhuj, Rizwan Jouhar, Muhammad Adeel Ahmed, Abdullatif Abdulrahman Almujhim, Mohammed Tariq Albutayh, Necdet Adanir
Diagnostics.2022; 12(9): 2121. CrossRef
Ethnical Anatomical Differences in Mandibular First Permanent Molars between Indian and Saudi Arabian Subpopulations: A Retrospective Cross-sectional Study
Abdulwahab Alamir, Mohammed Mashyakhy, Apathsakayan Renugalakshmi, Thilla S Vinothkumar, Anandhi S Arthisri, Ahmed Juraybi
The Journal of Contemporary Dental Practice.2021; 22(5): 484. CrossRef

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Case Report

Endodontic management of a mandibular second molar with radix entomolaris: a case report: Rosaline Hannah, Deivanayagam Kandaswamy, Nachimuthu Jayaprakash; Restor Dent Endod 2014;39(2):132-136. Published online March 21, 2014; DOI: https://doi.org/10.5395/rde.2014.39.2.132

Abstract PDF PubReader ePub

The presence of radix entomolaris (RE) in a mandibular first molar is a common occurrence in certain ethnic groups, but the presence of RE in a mandibular second molar is a rare occurrence. In the present case, RE was identified from preoperative radiographs and confirmed using cone-beam computed tomography (CBCT). The access cavity was modified to locate the RE. Cleaning and shaping were performed with nickel-titanium rotary instruments. Obturation was completed with gutta-percha cones using AH Plus (Dentsply Detrey GmbH) as sealer. From the CBCT axial images, the RE was determined to have a Type III curvature by the De Moor classification, Type B separate RE by the Carlsen and Alexandersen classification, and radiographically, a Type i image by the Wang classification. The presence of RE in the mandibular second molar makes it essential to anticipate and treat the distolingual root canal. This case report highlights the usefulness of CBCT for assessing RE in the mandibular second molar, which can help the clinician in making a confirmatory diagnosis and assessing the morphology of the root canal.

Citations

Citations to this article as recorded by

Endodontic Treatment of a Mandibular Second Molar Featuring Vertucci Type V Configuration in the Distal Root: A Case Report
He Liu, Ya Shen
Cureus.2024;[Epub] CrossRef
Endodontic management of a case of radix entomolaris: A case report
Priyanka Shorey, Kitty Sidhu
IP Indian Journal of Conservative and Endodontics.2022; 7(1): 39. CrossRef
Endodontic treatment of tooth with morphological anomalies using cone-beam computed tomography
Sung-Hyeon Choi, Na-Kyung Yoon, Ji-Hyun Jang, Young-Hoon Kim, Hoon-Sang Chang, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh, Bin-Na Lee
Oral Biology Research.2018; 42(1): 53. CrossRef
Unusual root morphology in second mandibular molar with a radix entomolaris, and comparison between cone-beam computed tomography and digital periapical radiography: a case report
Elisardo López-Rosales, Pablo Castelo-Baz, Roland De Moor, Manuel Ruíz-Piñón, Benjamín Martín-Biedma, Purificación Varela-Patiño
Journal of Medical Case Reports.2015;[Epub] CrossRef

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4 Crossref

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