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Anat Cell Biol

Published online August 20, 2020

https://doi.org/10.5115/acb.20.153

Copyright © Korean Association of ANATOMISTS.

A rare case of trifid mandibular canal with bilateral retromolar foramina

Quang Do1 , Daniel Shen1 , Hiroe Ohyama2 , R. Shane Tubbs3,4,5,6 , Joe Iwanaga3,7,8

1Harvard School of Dental Medicine, Harvard University, Boston, MA, 2Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston MA, 3Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, 4Department of Anatomical Sciences, St. George’s University, St. George’s, Grenada, 5Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, LA, 6Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA, USA, 7Dental and Oral Medical Center, Kurume University School of Medicine, Kurume, Fukuoka, 8Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Fukuoka, Japan

Correspondence to:Joe Iwanaga
Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA 70112, USA
E-mail: iwanagajoeca@gmail.com

Received: June 18, 2020; Revised: July 11, 2020; Accepted: July 13, 2020

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

There are many reported anatomical variations of the mandibular canal. Consequently, there is great variation in the retromolar area, such as the quantity, size, and location of the retromolar foramen (RMF), the bony entrance of the retromolar canal (RMC). These variations allow for different accessory innervations to the mandibular molars and their adjacent buccal tissue because the RMC contains neurovascular bundles. Consideration of these anatomical variations is crucial for avoiding complications in anesthesia, implant placement, and surgery. However, the rarer canal types are often only imaged by computed tomography (CT) or cone beam computed tomography (CBCT). We present a rare case with bilateral RMF and a unilateral trifid mandibular canal in a cadaver.

Keywords: Mandible, Oral surgery, Anatomy, Anatomic variation, Cadaver

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