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Evaluation of radix entomolaris in mandibular first and second molars using cone-beam computed tomography and review of the literature

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A Correction to this article was published on 19 April 2022

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Abstract

Objectives

The aim of the present study is to identify the prevalence of radix entomolaris in mandibular first and second molars and to determine morphological classifications and associations with other root and canals.

Methods

Mandibular first and second molar teeth of 850 Turkish patients were evaluated using cone-beam computed tomography. A total of 2800 mandibular first molars and second molars were screened. The CBCT examination was performed at five different axial levels. The prevalence of total radix entomolaris, unilateral–bilateral, right–left side and gender distributions, and the classification of radix entomolaris’s canal configurations were measured.

Results

Radix entomolaris was found in 2.9% (n = 25) of the patients and 1.2% (n = 34) of the teeth. The prevalence of radix entomolaris in mandibular first molars was higher than in mandibular second molars (p < 0.01), in males than in females (p < 0.05) and in right side than left side. An additional tubercle was found in 23% of the teeth with radix entomolaris. For buccolingual orientation, Type A canal variation was the highest and Type C canal variation was the lowest. Regarding locations of cervical parts, Type III canal variation was the highest while Type I canal variation was the lowest.

Conclusions

The prevalence of radix entomolaris was lower in the Turkish population than in other Asian populations but, in multiethnic societies, it needs attention. Before starting endodontic treatment, the clinician should examine the radiography thoroughly and apply advanced radiography methods when necessary. Cone-beam computed tomography is a valuable advanced radiography method for assessing such anatomical variations in vivo.

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Authors and Affiliations

  1. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Inonu University, Malatya, Turkey

    Suayip Burak Duman

  2. Department of Pedodontics, Faculty of Dentistry, Inonu University, 44280, Malatya, Turkey

    Sacide Duman

  3. Department of Oral and Maxillofacial Radiology, Eskisehir Osmangazi University, Eskisehir, Turkey

    Ibrahim Sevki Bayrakdar

  4. Department of Oral and Maxillofacial Radiology, Ordu University, Ordu, Turkey

    Yasin Yasa

  5. Department of Oral and Maxillofacial Radiology, Sakarya University, Sakarya, Turkey

    Ismail Gumussoy

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  1. Suayip Burak Duman
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  2. Sacide Duman
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  3. Ibrahim Sevki Bayrakdar
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  4. Yasin Yasa
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  5. Ismail Gumussoy
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Correspondence to Sacide Duman.

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Human rights statements and informed consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Informed consent was obtained from all patients for being included in the study.

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This article does not contain any studies with animal subjects performed by the any of the authors.

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The original online version of this article was revised due to the reference 4 was missing and placed as one of reference 28. Moreover, citation numbers in the texts were assigned wrongly. References and citation numbers have been corrected in the original article.

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Duman, S.B., Duman, S., Bayrakdar, I.S. et al. Evaluation of radix entomolaris in mandibular first and second molars using cone-beam computed tomography and review of the literature. Oral Radiol 36, 320–326 (2020). https://doi.org/10.1007/s11282-019-00406-0

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  • DOI: https://doi.org/10.1007/s11282-019-00406-0

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