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Structural comparison of hemifacial microsomia mandible in different age groups by three-dimensional skeletal unit analysis

Authors
 Bong Chul Kim  ;  Helios Bertin  ;  Hak-Jin Kim  ;  Sang-Hoon Kang  ;  Jacques Mercier  ;  Jean-Philippe Perrin  ;  Pierre Corre  ;  Sang-Hwy Lee 
Citation
 JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY, Vol.46(11) : 1875-1882, 2018 
Journal Title
 JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY 
ISSN
 1010-5182 
Issue Date
2018
Keywords
Age ; Growth ; Hemifacial microsomia ; Mandible ; Skeletal unit ; Structure ; Three-dimensional
Abstract
PURPOSE: The goal of this study was to understand the three-dimensional (3D) structural characteristics of hemifacial microsomia (HFM) mandible in terms of skeletal units, especially to locate the underdeveloped skeletal regions for treatment. Another goal was to compare the HFM structure of different age groups to understand growth potential relevant to treatment scheduling. MATERIALS AND METHODS: We reconstructed 3D mandibles from computed tomographic images of French and Korean patients with HFM (N = 28; group II) and normal subjects (N = 27; group I). Each mandible was classified by Pruzansky's HFM types I, II and III, and by age group (child, adolescent, and adult). The mandible was divided into skeletal units, and geometrical representation by skeletal unit line was performed, including the condylar, body, coronoid, and angular units. Their length and angulations were measured and statistically analyzed. RESULTS: The results showed that the affected condylar unit in type II HFM and the condylar/coronoid unit in type III were smaller in young age groups than were other units. The angulation between the skeletal units in type II, though not type III, tended toward normalcy with age, but not to the normal degree of angulations in group I. CONCLUSION: Our study shows the major involvement of condylar unit and minor involvement of body unit for HFM, improving with age in type II. The mandibular skeletal unit analysis seems to be a useful tool for individualized diagnosis, allowing identification of the major etiopathogenic area and treatment planning, including a simulation to set up a regimen for successful reconstruction of HFM.
Full Text
https://www.sciencedirect.com/science/article/pii/S1010518218306796
DOI
10.1016/j.jcms.2018.08.009
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hak Jin(김학진) ORCID logo https://orcid.org/0000-0001-6063-3406
Lee, Sang Hwy(이상휘) ORCID logo https://orcid.org/0000-0002-9438-2489
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/166669
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