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Correlation Analysis of Three-Dimensional Changes of Hard and Soft Tissues in Class III Orthognathic Surgery Patients Using Cone-Beam Computed Tomography.

Authors
 Tae-Yeon Lee  ;  Kyung-Ho Kim  ;  Hyung-Seog Yu  ;  Kee-Deog Kim  ;  Young-Soo Jung  ;  Hyoung-Seon Baik 
Citation
 Journal of Craniofacial Surgery, Vol.25(4) : 1530-1540, 2014 
Journal Title
 Journal of Craniofacial Surgery 
ISSN
 1049-2275 
Issue Date
2014
Abstract
BACKGROUND: This study was to investigate the correlation between changes of the soft and hard tissues three-dimensionally in class III orthognathic patients using cone-beam computed tomography. METHODS:Cone-beam computed tomography images were obtained within 2 weeks before surgery and at 6 months after surgery in 18 adult class III patients who underwent Le Fort I osteotomy and bilateral intraoral vertical ramus osteotomy. Subjects were divided into group 1 with no mandibular asymmetry (menton deviation, <2 mm; n = 9) and group 2 with mandibular asymmetry (menton deviation, >4 mm; n = 9). Landmarks were designated on the reconstructed three-dimensional models. Correlations and proportions of changes of the soft tissue to hard tissue were calculated. RESULTS:There were significant correlations of ΔB' to ΔB and ΔPog' to ΔPog in both groups on the horizontal axis (P < 0.05), and their proportions were 0.53 and 0.67 in group 1 and 0.77 and 0.88 in group 2, respectively. There were significant correlations of ΔB' to ΔB, ΔPog' to ΔPog, and ΔMe' to ΔMe on the sagittal axis in both groups (P < 0.05), and their proportions were 0.94, 0.84, and 0.96 in group 1 and 0.95, 0.91, and 1.03 in group 2, respectively. There were significant correlations of the three-dimensional distances between ΔB' to ΔB, ΔPog' to ΔPog, and ΔMe' to ΔMe in both groups (P < 0.05), and their proportions were 0.92, 0.79, and 0.95 in group 1 and 0.92, 0.88, and 0.97 in group 2, respectively. However, there were no significant correlations between changes in soft and hard tissues on the vertical axis in both groups (P > 0.05). CONCLUSIONS:In class III orthognathic patients with mandibular asymmetry, the proportions of ΔB' to ΔB, ΔPog' to ΔPog, and ΔMe' to ΔMe on the horizontal and sagittal axes and the three-dimensional distances were different from patients with no mandibular asymmetry
Full Text
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&AN=00001665-201407000-00098&LSLINK=80&D=ovft
DOI
10.1097/SCS.0000000000000620
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Advanced General Dentistry (통합치의학과) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
김경호(Kim, Kyung Ho) ORCID logo https://orcid.org/0000-0002-8154-2041
김기덕(Kim, Kee Deog) ORCID logo https://orcid.org/0000-0003-3055-5130
백형선(Baik, Hyoung Seon)
유형석(Yu, Hyung Seog) ORCID logo https://orcid.org/0000-0002-1275-5078
정영수(Jung, Young Soo) ORCID logo https://orcid.org/0000-0001-5831-6508
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/99255
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