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Submitted: 11 Sep 2020
Accepted: 22 Dec 2020
ePublished: 30 Dec 2020
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Avicenna J Dent Res. 2020;12(4): 136-141.
doi: 10.34172/ajdr.2020.27
  Abstract View: 86
  PDF Download: 64

Original Article

Prevalence and Anatomic Characteristics of Accessory Mental Foramen Using Cone-Beam Computed Tomography Views in an Iranian Population

Marouf Noruzi 1 ORCID logo, Maryam Mostafavi 1, Aysan Ghaznavi 1, Amir Ardalan Abdollahi 2* ORCID logo

1 Assistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.
2 Assistant Professor, Department of Endodontics, School of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.
1 Assistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.
2 Assistant Professor, Department of Endodontics, School of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.
*Correspondence to Amir Ardalan Abdollahi Tel: +98-914 409 13 17, Fax: +98 413 334 69 77, Email: ardalan_2000a@ yahoo.com

Abstract

Background: Determining the incidence and anatomic features of accessory mental foramen (AMF) in the Iranian population is of vital importance. This study investigated the prevalence and anatomic characteristics of AMF using cone-beam computed tomography (CBCT) in a selected Iranian population.

Methods: A total of 853 CBCT images from 440 women and 413 men were examined in this cross-sectional retrospective study. The images were evaluated by two independent observers using reconstructed 3-dimensional, cross-sectional, and panoramic views. Several parameters were assessed, including the location of AMF relative to mental foramen (MF), size and the point of canal bifurcations, and the distance between the main and accessory canals. Finally, statistical differences in the AMF prevalence in terms of gender and direction and its location were evaluated by the Mann-Whitney U test (P<0.05).

Results: The prevalence of AMF was 10.55%, which was more frequently located in the posterior inferior area relative to the main MF, and its nerve was more frequently originated from the anterior loop (P=0.001). There were no statistically significant differences in gender (P=0.26) and direction (P=0.4). The mean distance of AMF was 7.62 mm. The mean height of MF and the AMF vertical height were 13.65 mm and 52.12 mm in those with AMF on one side, respectively, and this difference was statistically significant (P=0.001). The sizes of the MF and AMF were 3.2 mm (large diameter), 2.3 mm (small diameter), and 1.4 mm (large diameter), and 1.1 mm (small diameter), respectively.

Conclusions: Based on the findings of the present study, the prevalence of AMF according to hemi-mandibular was 5.80% in the selected Iranian population. Thus, AMF might branch from any section of the inferior alveolar nerve and the mandibular canal.

Keywords: Cone-beam computed tomography, Mental foramen, Prevalence
Citation: Noruzi M, Mostafavi M, Ghaznavi A, Abdollahi AA. Prevalence and anatomic characteristics of accessory mental foramen using cone-beam computed tomography views in an iranian population. Avicenna J Dent Res. 2020;12(4):136- 141. doi: 10.34172/ajdr.2020.27.
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