Assessment of the anterior loop of the inferior alveolar nerve via cone-beam computed tomography
Shaban Baratollah, Khajavi Amin, Khaki Nasim, Mohiti Yones, Mehri Tahere, Kermani Hamed,
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( Shaban Baratollah ) - Mashhad University of Medical Sciences Faculty of Dentistry Department of Oral and Maxillofacial Surgery
( Khajavi Amin ) - Mashhad University of Medical Sciences Faculty of Dentistry Department of Periodontics
( Khaki Nasim ) - Mashhad University of Medical Sciences Faculty of Dentistry Department of Oral and Maxillofacial Radiology
( Mohiti Yones ) - Mashhad University of Medical Sciences Faculty of Dentistry Department of Oral and Maxillofacial Radiology
( Mehri Tahere ) - Mashhad University of Medical Sciences Faculty of Dentistry Department of Oral and Maxillofacial Radiology
( Kermani Hamed ) - Mashhad University of Medical Sciences Faculty of Dentistry Department of Oral and Maxillofacial Surgery
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.
키워드
Anterior; Mental loop; Cone-beam computed tomography; Iran
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