Development of 3D statistical mandible models for cephalometric measurements
김성구, 이원진, 황순정, 최순철, 이삼선, 허민석, 허경회, 김태일, Hong Helen, 유지현,
소속 상세정보
김성구 ( Kim Sung-Goo ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이원진 ( Yi Won-Jin ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
황순정 ( Hwang Soon-Jung ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Surgery
최순철 ( Choi Soon-Chul ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이삼선 ( Lee Sam-Sun ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
허민석 ( Heo Min-Suk ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
허경회 ( Heo Kyung-Hoe ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
김태일 ( Kim Tae-Il ) - Seoul National University School of Dentistry Department of Periodontology
( Hong Helen ) - Seoul Women’s University Division of Multimedia Engineering
유지현 ( Yoo Ji-Hyun ) - Seoul Women’s University Division of Multimedia Engineering
KMID : 1024020120420030175
Abstract
Purpose: The aim of this study was to provide sex-matched three-dimensional (3D) statistical shape models of the mandible, which would provide cephalometric parameters for 3D treatment planning and cephalometric measurements in orthognathic surgery.
Materials and Methods: The subjects used to create the 3D shape models of the mandible included 23 males and 23 females. The mandibles were segmented semi-automatically from 3D facial CT images. Each individual mandible shape was reconstructed as a 3D surface model, which was parameterized to establish correspondence between different individual surfaces. The principal component analysis (PCA) applied to all mandible shapes produced a mean model and characteristic models of variation. The cephalometric parameters were measured directly from the mean models to evaluate the 3D shape models. The means of the measured parameters were compared with those from other conventional studies. The male and female 3D statistical mean models were developed from 23 individual mandibles, respectively.
Results: The male and female characteristic shapes of variation produced by PCA showed a large variability included in the individual mandibles. The cephalometric measurements from the developed models were very close to those from some conventional studies.
Conclusion: We described the construction of 3D mandibular shape models and presented the application of the 3D mandibular template in cephalometric measurements. Optimal reference models determined from variations produced by PCA could be used for craniofacial patients with various types of skeletal shape.
키워드
Three-Dimensional Image; Mandible; Cephalometry; Principal Component Analysis
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