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ORIGINAL ARTICLES
Published online: 2018-07-03
Submitted: 2018-02-28
Accepted: 2018-05-30
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Morphological variations of the mandibular canal in digital panoramic radiographs: a retrospective study in a Chilean population

Ramón Fuentes, Alain Arias, Constanza Farfán, Nicolás Astete, Ivonne Garay, Pablo Navarro, Fernando J. Dias
DOI: 10.5603/FM.a2018.0058
·
Pubmed: 30009366

open access

Ahead of Print
ORIGINAL ARTICLES
Published online: 2018-07-03
Submitted: 2018-02-28
Accepted: 2018-05-30

Abstract

Background. Morphological variations of the mandibular canal (MC) have been described in literature, so the clinician must be able to recognise them and adapt their treatment accordingly. The aim of this study was to determine the prevalence of morphological variations of the MC using digital panoramic radiographs (DPR) of Chilean patients.

Materials and Methods. A retrospective study in which 1400 DPR were analysed to identify cases of bifid, trifid and retromolar MC. The radiographs were analysed independently by two examiners who had previously been trained by a specialist in oral and maxillofacial radiology. Inclusion and exclusion criteria were applied to reach a final sample.

Results. 925 radiographs were included (599 female, 326 male; mean age 36.1 ± 15.54 years). The prevalence of bifid MC was 11% (n=102), with no significant differences by sex (p=0.069). Proportion of bifid MC was higher among younger patients (p=0.038). Prevalence of morphological variations of Type 1 bifid MC was 7.4% (n=69), Type 2 was 2.3% (n=23), Type 3 was 0% (n=0) and Type 4 was 1.1% (n=10). Prevalence of retromolar canal was 0.9% (n=8), with no significant differences by sex (p=0.893) or age (p=0.371); of these, 2 cases (0.2%) were forward type and 6 cases (0.6%) were retromolar type. No cases of trifid MC were found.

Conclusions. DPR are useful for detecting morphological variations of the MC; we were able to identify three types of bifid MC as well as retromolar canals. Proper identification of these variations by an easily accessible examination is important for avoiding possible complications in clinical-surgical practice.

Abstract

Background. Morphological variations of the mandibular canal (MC) have been described in literature, so the clinician must be able to recognise them and adapt their treatment accordingly. The aim of this study was to determine the prevalence of morphological variations of the MC using digital panoramic radiographs (DPR) of Chilean patients.

Materials and Methods. A retrospective study in which 1400 DPR were analysed to identify cases of bifid, trifid and retromolar MC. The radiographs were analysed independently by two examiners who had previously been trained by a specialist in oral and maxillofacial radiology. Inclusion and exclusion criteria were applied to reach a final sample.

Results. 925 radiographs were included (599 female, 326 male; mean age 36.1 ± 15.54 years). The prevalence of bifid MC was 11% (n=102), with no significant differences by sex (p=0.069). Proportion of bifid MC was higher among younger patients (p=0.038). Prevalence of morphological variations of Type 1 bifid MC was 7.4% (n=69), Type 2 was 2.3% (n=23), Type 3 was 0% (n=0) and Type 4 was 1.1% (n=10). Prevalence of retromolar canal was 0.9% (n=8), with no significant differences by sex (p=0.893) or age (p=0.371); of these, 2 cases (0.2%) were forward type and 6 cases (0.6%) were retromolar type. No cases of trifid MC were found.

Conclusions. DPR are useful for detecting morphological variations of the MC; we were able to identify three types of bifid MC as well as retromolar canals. Proper identification of these variations by an easily accessible examination is important for avoiding possible complications in clinical-surgical practice.

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Keywords

mandibular canal, morphological variations, bifid canal, trifid canal, retromolar canal

About this article
Title

Morphological variations of the mandibular canal in digital panoramic radiographs: a retrospective study in a Chilean population

Journal

Folia Morphologica

Issue

Ahead of Print

Published online

2018-07-03

DOI

10.5603/FM.a2018.0058

Pubmed

30009366

Keywords

mandibular canal
morphological variations
bifid canal
trifid canal
retromolar canal

Authors

Ramón Fuentes
Alain Arias
Constanza Farfán
Nicolás Astete
Ivonne Garay
Pablo Navarro
Fernando J. Dias

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