안면비대칭 정도에 따른 정모 두부방사선사진관 3차원영상의 비교 연구
A Comparative Study of P-A Cephalometry and Three-Dimensional Morphometry according to The Degree of Facial Asymmetry
구강과학- 전남대학교 2001년 13권 2호 p.169 ~ 193
조홍규, 황현식, 김경근,
소속 상세정보
조홍규 ( ) - 전남대학교 치과대학 교정학교실
황현식 ( ) - 전남대학교 치과대학 교정학교실
김경근 ( ) - 전남대학교 치과대학 약리학교실
KMID : 0988420010130020169
Abstract
The purpose of this study was to find out the problems of P A cephalometric measurements used in the facial asymmetry analysis and to show the necessity of using three dimensional morphometry.
Steel ball (1.2㎜ in diameter) were attached in twenty seven landmarks of symmetrical artificial human skull, and eighty seven different asymmetrical artificial human skulls were formed by enlarging gradually remus height, mandibular body length, and gonial angle of the hemiface.
From the P A cephalometry and three dimensional morphometry of each skull types, three linear measurements (representing ramus height, mandibular body length, mandibular length) and two angle measurements (representing gonial angle, menton deviation) and two area measurements (representing mandibular area, lower facial area) were acquired and made into asymmetry index. Menton deviation itself was used as asymmetry index while left right differences were used in the other measurements. These asymmetry index were compared with each other to show the different aspect of the seven asymmetry index according to the degree of actual facial asymmetry. Through the statistical analysis, following results were obtained.
1. When actual ramus height difference becomes large, menton deviation and lower facial area asymmetry index of P A cephalometry were reduced significantly more than those of three dimensional morphometry (p<0.001).
2. When actual mandibular body length difference becomes large, ramus height, lower facial area asymmetry index of P A cephalometry were reduced significantly (p<0.001) while mandibular body length, mandibular length, gonial angle, and mandibular area asymmetry index of P A cephalomentry were magnified significantly more than those of three dimensional morphometry (p<0.01).
3. When actual gonial angle difference becomes large, gonial angle asymmetry index of P A cephalometry was reduced significantly (p<0.001) while lower facial area, mandibular body length, and mandibular area asymmetry index were magnified significantly more than those of three dimensional morphometry (p<0.01).
4. When the correlation between actual ramus height difference and seven asymmetry index of P A cephalometry and three dimensional morphometry was analysed, no difference between P A cephalometry and three dimensional morphometry was found (p<0.01).
5. When the correlation between actual mandibular body length difference and seven asymmetry index of P A cephalometry and three dimensional morphometry was analysed, significance was found in mandibular body length, mandibular length, menton deviation, mandibular area, and lower facial area (p<0.001) while significance was found only in gonial angle of three dimensional morphometry (p<0.01).
6. When the correlation between actual gonial angle difference and seven asymmetry index of P A cephalometry and three dimensional morphometry was analysed, significance was found in gonial angle (p<0.001) while significance was found only in lower facial area of three dimensional morphometry (p<0.01).
The above results suggest that three dimensional morphometry show to be necessary for the accurate facial asymmetry analysis.
키워드
원문 및 링크아웃 정보
등재저널 정보