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Vulnerability of the Inferior Alveolar Nerve and Mental Nerve During Genioplasty: An Anatomic Study

Authors
 Kun Hwang  ;  Whan Joon Lee  ;  You Bong Song  ;  In Hyuk Chung 
Citation
 JOURNAL OF CRANIOFACIAL SURGERY, Vol.16(1) : 10-14, 2005 
Journal Title
 JOURNAL OF CRANIOFACIAL SURGERY 
ISSN
 1049-2275 
Issue Date
2005
MeSH
Cadaver ; Cephalometry ; Chin/innervation* ; Chin/surgery ; Dissection ; Female ; Humans ; Intraoperative Complications ; Male ; Mandible/anatomy & histology ; Mandible/innervation* ; Mandibular Nerve/anatomy & histology* ; Middle Aged ; Osteotomy/adverse effects
Keywords
Genioplasty ; inferior alveolar nerve ; man-dibular canal ; mental foramen
Abstract
Microgenia or "small chin" is corrected by various techniques, such as insertion of an alloplastic implant, cartilage or bone grafting, or horizontal advancement osteotomy. Horizontal recession osteotomy is used in macrogenia. Particularly in a microgenic mandible, the mental foramen is unexpectedly nearer to the inferior border of the body. During sliding horizontal osteotomy of the mentum, the inferior alveolar nerve (IAN) and mental nerve are vulnerable to an injury. Thirty fresh hemimandibles were used for a study of the IAN. The IAN course was traced by serial sections at intervals of 5 mm. In 50 dry specimens the direction of the mandibular canal was evaluated by the photographs with a stick put into the mental foramen. The IAN in mandibular canal runs above the lower one-third of the mandibular body. The terminal mandibular canal locates at an average of 4.5 mm under the mental foramen, advances 5.0 mm anteriorly, loops, and ends at the foramen. The direction of the mandibular canal at the mental foramen was 39.4 degrees lateral, 67.2 degrees superior, and 80.2 degrees posterior. It is advisable for surgeons to keep the level of sliding osteotomy of the mentum at least 4.5 mm below the mental foramen to spare the IAN.
Full Text
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&AN=00001665-200501000-00004&LSLINK=80&D=ovft
DOI
OAK-2005-06075
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Anatomy (해부학교실) > 1. Journal Papers
Yonsei Authors
Chung, In Hyuk(정인혁)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/151397
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