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Facial soft-tissue analysis of Korean adults with normal occlusion using a 3-dimensional laser scanner

Authors
 Hyoung-Seon Baik  ;  Jai-Min Jeon  ;  Hwa-Jin Lee 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.131(6) : 759-766, 2007 
Journal Title
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
ISSN
 0889-5406 
Issue Date
2007
Abstract
INTRODUCTION:
Developments in computer technology have made the 3-dimensional (3D) diagnosis of facial soft tissues possible, opening the window for 3D soft-tissue evaluation in orthodontic treatment planning and posttreatment results.
METHODS:
Korean adults (30 men, 30 women) with normal occlusion were scanned with a 3D laser scanner, and 3D facial images were made with the Rapidform 2004 program (Inus Technology, Seoul, Korea). Reference planes in the facial soft tissues of the 3D image were established, and a 3D coordinate system (X-axis, left/right; Y-axis, superior/inferior; Z-axis, anterior/posterior) was established; 29 measurement points were assigned on the 3D image, and 39 linear measurements, 8 angular measurements, and 29 linear distance ratios were obtained.
RESULTS:
Significant differences between the sexes were found in nasofrontal angle (men, 142 degrees; women, 147 degrees) and transverse nasal prominence (men, 112 degrees; women, 116 degrees) (P <.05). Transverse upper lip prominence was 107 degrees in the men and 106 degrees in the women, and transverse mandibular prominence was 76 degrees in both sexes. The distance between lower lip vermilion border (Li) and Me' was 0.4 times mandibular body length (Me' - Go'), and mouth height was also 0.4 times the mouth width. The linear distance ratios from the coronal reference plane to fronto-temporal point, zygomatic point, pronasale, upper lip point, labrale inferior, and soft-tissue menton were -1, -1, 1, 0.5, 0.5, and -0.6, respectively.
CONCLUSIONS:
These data could be guidelines for the 3D evaluation of the facial image, because the 3D facial model constructed by the averaged coordinate values could be a template for orthodontic diagnosis and treatment planning.
Full Text
http://www.sciencedirect.com/science/article/pii/S088954060700203X
DOI
10.1016/j.ajodo.2005.08.038
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Baik, Hyoung Seon(백형선)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/95558
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