J Korean Assoc Oral Maxillofac Surg 2017; 43(6): 395~400
Assessment of the anterior loop of the inferior alveolar nerve via cone-beam computed tomography
Baratollah Shaban1, Amin Khajavi2, Nasim Khaki3, Yones Mohiti3, Tahere Mehri3, Hamed Kermani1,*
Departments of 1Oral and Maxillofacial Surgery, 2Periodontics, and 3Oral and Maxillofacial Radiology,
Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Hamed Kermani
Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
*Current affiliation: Craniofacial and Pediatric Maxillofacial Surgery Fellow, Department of Oral and Maxillofacial Surgery, Tehran University of Medical Sciences Dental School, North Kargar Street, Tehran, Iran
TEL: +00989128361094 FAX: +00982188015880
E-mail: hamedkermani1980@gmail.com
ORCID: http://orcid.org/0000-0003-4735-2751
Received January 21, 2017; Revised April 7, 2017; Accepted May 7, 2017.; Published online December 31, 2017.
© Korean Association of Oral and Maxillofacial Surgeons. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Objectives: The aim of this study was to evaluate different anatomical variants of the anterior loop of the inferior alveolar nerve (IAN) via cone-beam computed tomography (CBCT).
Materials and Methods: CBCT images of 71 patients (36 males and 35 females) were evaluated. We used the classification described by Solar for IAN evaluation. In this classification, three different types of IAN loops were introduced prior to emerging from the mental foramen. We classified patients according to this system and introduced a new, fourth type.
Results: Type I was seen in 15 sites (10.6%), type II in 39 sites (27.5%), and type III in 50 sites (35.2%). We found a new type in 38 sites (26.8%) that constituted a fourth type.
Conclusion: We found that type III was the most common variant. In the fourth type, the IAN was not detectable because the main nerve was adjacent to the cortical plate and the incisive branch was thinner than the main branch and alongside it. In this type, more care is needed for surgeries including inferior alveolar and mental nerve transposition.
Keywords: Anterior, Mental loop, Cone-beam computed tomography, Iran


Current Issue

30 April 2018
Vol. 44
No. 2 pp. 41~90

Indexed in