3차원 CT 영상을 이용한 두 개악안면 분석을 위한 계측점의 제안
A proposal of landmarks for craniofacial analysis using three-dimensional CT imaging
장혜숙, 조정호,
소속 상세정보
장혜숙 ( ) - 연세대학교 치과대학 교정학교실
조정호 ( ) - 연세대학교 치과대학 교정학교실
KMID : 0361920020320050313
Abstract
Three-dimensional CT imaging is efficient in examining specific structures in the craniofacial area by reproducing actual measurements through minimization of errors from patient movement and image magnification. Due to the rapid development of digital image technology and the expansion of treatment range a need for developing three -dimensional analysis has become urgent. Therefore the purpose of this study was to evaluate the percentage of error and magnification of three-dimensional CT using a dried skull and Works program (Cybermed Inc., Seoul,
Korea) and also to obtain landmarks that are easy to designate and reproduce in three-dimensional images using the Vmorph-proto program (Cybermed Inc., Seoul, Korea). The following conclusions were obtained ;
1. In the comparison of actual measurements from the dried skull and the three-dimensional image obtained from
the Works program, the mean error was 0.99mm and the magnification was 1.04%.
2. Clinically useful hard tissue landmarks from three-dimensional images were Supraorbitale, Lateral orbital margin,
Infraorbitale, Nasion, ANS, A point, Zygomaticomaxilla, Upper incisor, Lower incisor, B point, pogonion, Menton,
PNS, Condylar inner margin, Condylar outer margin, Porion, Condylion, Gonionl, Gonion2, Gonion3, Sigmoid
notch and Basion.
3. Clinically useful soft tissue landmarks from three-dimensional images were Endocanthion, Exocanthion, Soft tissue Nasion, Pronasale, Alare lateralis, Upper nostril point, Lower nostril point, Subnasale, Upper lip point, Cheilion, Stomion, Lower lip center, Soft tissue B, Pogonion, Menton and Preaurale.
The Works program can be considered a clinically efficient tool to produce and measure three-dimensional images. Most of the hard and soft tissue landmarks proposed above are anatomically important points which are also easily reproducible and designated. These landmarks can be beneficial in three-dimensional diagnosis and the prediction of changes before and after surgery.
키워드
3차원CT;두개악안면 분석;계측점;Three-dimensional CT Imaging;Craniofacial analysis;Landmarks
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