Three-dimensional analysis of the anterior loop of the inferior alveolar nerve in relation to the growth pattern of the mandibular functional subunit
10.1186/s40902-018-0170-4
- Author:
Seungkyu YOON
1
;
Jae Young KIM
;
Cheol Hee JEONG
;
Jengbin PARK
;
Jong Ki HUH
;
Kwang Ho PARK
Author Information
1. Department of Oral and Maxillofacial Surgery, Gangnam Severance Hospital, Yonsei University College of Dentistry, 211 Eonju-ro, Gangnam-gu, Seoul, 06273 South Korea. omspark@yuhs.ac.
- Publication Type:Original Article
- Keywords:
Mandibular nerve;
Genioplasty;
Computed tomography;
Chin;
Chin repositioning
- MeSH:
Chin;
Genioplasty;
Humans;
Mandibular Nerve;
Orthognathic Surgery;
Prognathism;
Retrognathia
- From:Maxillofacial Plastic and Reconstructive Surgery
2018;40(1):30-
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: The purpose of the present study was to investigate the differences in the position and shape of the anterior loop of the inferior alveolar nerve (ALIAN) in relation to the growth pattern of the mandibular functional subunit. METHODS: The study was conducted on 56 patients among those who had undergone orthognathic surgery at the Gangnam Severance Hospital between January 2010 and December 2015. Preoperative computerized tomography (CT) images were analyzed using the Simplant OMS software (ver.14.0 Materialise Medical, Leuven, Belgium). The anterior and inferior lengths of ALIAN (dAnt and dInf) and each length of the mandibular functional subunits were measured. The relationship between dAnt, dInf, and the growth pattern of the mandibular subunits was analyzed. RESULTS: The length of the anterior portion of ALIAN (dAnt) reached 3.34 ± 1.59 mm in prognathism and 1.00 ± 0.97 mm in retrognathism. The length of the inferior portion of ALIAN (dInf) reached 6.81 ± 1.33 mm in prognathism and 5.56 ± 1.34 mm in retrognathism. The analysis of Pearson’s correlation coefficiency on all samples showed that the lengths of functional subunits were positively correlated with the loop depth. The length of the symphysis area in prognathic patients was positively correlated with the anterior loop depth (p = 0.005). CONCLUSIONS: Both the anterior and inferior length of ALIAN are longer in prognathic patients. Especially, it seems to be associated with the growth of the symphysis area.
