A case report of unusual anatomical variation: externalisation of inferior alveolar nerve


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Authors
McAnerney, D 
Santhanam, V 
Abstract

INTRODUCTION: The risks of third molar surgery have been well documented with damage to the inferior alveolar nerve (IAN) being one of the largest concerns.

PRESENTATION OF CASE: This case report presents an impacted third molar with associated dentigerous cyst in which the IAN is externalised and runs along the lateral surface of the mandible.

DISCUSSION: This is an extremely rare anatomical variation with most IANs lying inferior and lingually to third molars. This case reiterates the limitations of standard radiographic techniques such as the orthopantomogram (OPG).

CONCLUSION: We would advocate the use of cone beam computed tomography (CBCT) in cases which have adverse plain radiographic features to allow appropriate surgical planning.

Description
Keywords
inferior alveolar nerve, dentigerous cyst, impacted third molars, cone beam computed tomography, maxillofacial anatomy
Journal Title
International Journal of Surgery Case Reports
Conference Name
Journal ISSN
2210-2612
2210-2612
Volume Title
31
Publisher
Elsevier