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Assessment of the Prevalence of Radix Entomolaris and Distolingual Canal in Mandibular First Molars in 15 Countries: A Multinational Cross-sectional Study with Meta-analysis

Hatipoğlu FP 1 , Mağat G 2 , Hatipoğlu Ö 3 , Al-Khatib H 4 , Elatrash AS 5 , Abidin IZ 6 Show all authors , Kulczyk T 7 , Ahmed Mohamed Alkhawas MB 8 , Buchanan GD 9 , Kopbayeva M 10 , Surendar S 11 , Javed MQ 12 , Madfa AA 13 , Bürklein S 14 , Mimica S 15 , Bhatti UA 16 , Maratovna TI 17 , Palma PJ 18 , Brochado Martins JF 19

Affiliations 

  • 1 Department of Endodontics, Nigde Omer Halisdemir University, Niğde, Turkey
  • 2 Faculty of Dentistry, Department of Oral Radiology, Necmettin Erbakan University, Konya, Turkey
  • 3 Department of Restorative Dentistry, Nigde Omer Halisdemir University, Niğde, Turkey
  • 4 Private Practice, Aljarrah Dental Care, Irbid, Jordan
  • 5 Faculty of Dentistry, Department of Conservative Dentistry and Endodontics, Libyan International Medical University, Benghazi, Libya
  • 6 Department of Restorative Dentistry, International Islamic University Malaysia (IIUM), Kuala Lumpur, Malaysia
  • 7 Department of Diagnostics, Poznan University of Medical Sciences, Poznan, Poland
  • 8 Faculty of Dental Medicine, Department of Endodontic, Al-Azhar University, Cairo, Egypt
  • 9 Department of Odontology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
  • 10 Kazakh National Medical University Asfendiyarov, Kazakhstan
  • 11 Department of Conservative Dentistry and Endodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India
  • 12 Department of Conservative Dental Sciences and Endodontics, College of Dentistry, Qassim University, Buraydah, Qassim, Saudi Arabia
  • 13 Department of Restorative Dental Science, College of Dentistry, University of Ha'il, Ha'il, Saudi Arabia; Department of Conservative Dentistry, Faculty of Dentistry, Thamar University, Dhamar, Yemen
  • 14 Central Interdisciplinary Ambulance in the School of Dentistry, University of Münster, Münster, Germany
  • 15 Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
  • 16 Department of Operative Dentistry and Endodontics, Riphah International University, Islamabad, Pakistan
  • 17 Department of Therapeutic Dentistry, Kazakh National Medical University Asfendiyarov, Almaty, Kazakhstan
  • 18 Center for Innovation and Research in Oral Sciences (CIROS), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute of Endodontics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal. Electronic address: ppalma@uc.pt
  • 19 Private Practice Limited to Endodontics, Amsterdam, The Netherlands
J Endod, 2023 Oct;49(10):1308-1318.
PMID: 37393948 DOI: 10.1016/j.joen.2023.06.011

Abstract

AIM: The aim of this study was two-folded: i) to assess the prevalence of Distolingual Canal (DLC) and Radix Entomolaris (RE) in Mandibular First Molars (M1Ms), using Cone Beam Computed Tomography (CBCT) images and ii) to assess the impact of sociodemographic factors on the prevalence of these conditions worldwide.

METHODS: CBCT images were scanned retrospectively and the ones including bilateral M1Ms were included in the study. The evaluation was performed by 1 researcher in each country, trained with CBCT technology. A written and video instruction program explaining the protocol to be followed step-by-step was provided to all observers to calibrate them. The CBCT imaging screening procedure consisted of evaluating axial sections from coronal to apical. The presence of DLC and RE in M1Ms (yes/no) was identified and recorded.

RESULTS: Six thousand three hundred four CBCTs, representing 12,608 M1Ms, were evaluated. A significant difference was found between countries regarding the prevalence of both RE and DLC (P  .05).

CONCLUSION: The overall prevalence of RE and DLC in M1Ms was 3% and 22%. Additionally, both RE and DLC showed substantial bilaterally. These variations should be considered by endodontic clinicians during endodontic procedures in order to avoid potential complications.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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