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Ahead of Print
CASE REPORTS
Published online: 2020-05-25
Submitted: 2020-05-07
Accepted: 2020-05-17
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Unilateral triple mandibular canal with double mandibular foramen: cone beam computed tomography findings of an unexpected anatomical variant

A. Borghesi, M. P. Bondioni
DOI: 10.5603/FM.a2020.0057
·
Pubmed: 32459362

open access

Ahead of Print
CASE REPORTS
Published online: 2020-05-25
Submitted: 2020-05-07
Accepted: 2020-05-17

Abstract

The mandibular canal is a bony channel located within the spongiosa of the mandible. The main structure contained in the mandibular canal is the inferior alveolar nerve (IAN). The IAN is a very important structure that requires due consideration during dental or surgical procedures involving the mandible. Therefore, a detailed morphological analysis of the mandibular canal should be carried out before any surgical procedure in the mandibular region in order to avoid complications and to reduce the risk of inadequate local nerve blocking. The human mandible typically has a single mandibular canal on each side; however, accessory mandibular canals have been described previously in the literature. The most common variant of the mandibular canal is the bifid mandibular canal, which has a prevalence ranging from 10-66% on cone-beam computed tomography (CBCT) examinations. A rare variant of bifid mandibular canal is the trifid canal, accounting for less than 6% of all bifid canals. In some cases, the bifid and trifid mandibular canals are associated with a double mandibular foramen, which is a rare anatomical variant with a reported incidence of 1.35% on CBCT images. Herein, we present the interesting CBCT images of an unexpected anatomical variant characterized by unilateral triple mandibular canal with double mandibular foramen in a young Caucasian woman.

Abstract

The mandibular canal is a bony channel located within the spongiosa of the mandible. The main structure contained in the mandibular canal is the inferior alveolar nerve (IAN). The IAN is a very important structure that requires due consideration during dental or surgical procedures involving the mandible. Therefore, a detailed morphological analysis of the mandibular canal should be carried out before any surgical procedure in the mandibular region in order to avoid complications and to reduce the risk of inadequate local nerve blocking. The human mandible typically has a single mandibular canal on each side; however, accessory mandibular canals have been described previously in the literature. The most common variant of the mandibular canal is the bifid mandibular canal, which has a prevalence ranging from 10-66% on cone-beam computed tomography (CBCT) examinations. A rare variant of bifid mandibular canal is the trifid canal, accounting for less than 6% of all bifid canals. In some cases, the bifid and trifid mandibular canals are associated with a double mandibular foramen, which is a rare anatomical variant with a reported incidence of 1.35% on CBCT images. Herein, we present the interesting CBCT images of an unexpected anatomical variant characterized by unilateral triple mandibular canal with double mandibular foramen in a young Caucasian woman.

Get Citation

Keywords

mandibular canal, anatomic variation, accessory mandibular canal, accessory mandibular foramen, mandible, cone beam computed tomography

About this article
Title

Unilateral triple mandibular canal with double mandibular foramen: cone beam computed tomography findings of an unexpected anatomical variant

Journal

Folia Morphologica

Issue

Ahead of Print

Published online

2020-05-25

DOI

10.5603/FM.a2020.0057

Pubmed

32459362

Keywords

mandibular canal
anatomic variation
accessory mandibular canal
accessory mandibular foramen
mandible
cone beam computed tomography

Authors

A. Borghesi
M. P. Bondioni

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