3D Analysis of Facial Asymmetry using CBCT

Yoon,  Suk-Ja; Wang,  Rui-Feng; Palomo,  J. Martin

J Korean Dent Assoc > Volume 48(10); 2010 > Article

The Journal of The Korean Dental Association 2010;48(10):724-728.
Published online October 31, 2010.

CBCT를 이용한 3차원 안면비대칭분석

윤숙자¹, ², ³

^¹전남대학교 치의학전문대학원 구강악안면방사선학교실
^²미시간대학교 치과대학 생물재료과학교실
^³캐이스웨스턴대학교 치과대학 교정학교실

3D Analysis of Facial Asymmetry using CBCT

Suk-Ja Yoon¹, Rui-Feng Wang², J. Martin Palomo³

¹Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University
²Department of Biologic and Material Sciences, School of Dentistry, University of Michigan
³Department of Orthodontics at Case Western Reserve University

Abstract

Accurate analysis of facial asymmetry prior to any orthognathic or orthodontic treatment plan is essential in ensuring good treatment result. Dental CBCT (Cone-beam Computed Tomography) provides as actual three-dimensional measurements of distance and angle without any radiographic magnification as medical CT provides, while its field of view is limited to the oral and maxillofacial area. CBCT is a useful tool for the diagnosis of facial asymmetry. The coordinates of facial landmarks are obtained from the 3D reconstruction software which enables the establishment of perpendicular planes and the identification of the landmarks. Then, the bilateral discrepancies of the landmarks are obtained as spherical polar coordinates which can show the amount of asymmetry and its direction. A method of 3D analysis of facial asymmetry using CBCT is introduced in this report.

Key Words: Cone-beam Computed Tomography;Facial asymmetry;Polar coordinates;