돼지 하악 과두의 해면골에서 유한요소분석법으로 예측한 방향에 따른 탄성율과 3차원 골 미세지표 간의 상관관계
The relationship between 3D bone architectural parameters and elastic moduli of three orthogonal directions predicted from finite elements analysis
박관수, 이삼선, 허경회, 이원진, 허민석, 최순철,
소속 상세정보
박관수 ( Park Kwan-Soo ) - 서울대학교 치의학대학원 구강악안면방사선학교실
이삼선 ( Lee Sam-Sun ) - 서울대학교 치과대학 구강악안면방사선학교실
허경회 ( Huh Kyung-Hoe ) - 서울대학교 치과대학 구강악안면방사선학교실
이원진 ( Yi Won-Jin ) - 서울대학교 치과대학 구강악안면방사선학교실
허민석 ( Heo Min-Suk ) - 서울대학교 치과대학 구강악안면방사선학교실
최순철 ( Choi Soon-Chul ) - 서울대학교 치과대학 구강악안면방사선학교실
KMID : 0896020080380020081
Abstract
Purpose : To investigate the relationship between 3D bone architectural parameters and direction-related elastic
moduli of cancellous bone of mandibular condyle.
Materials and Methods : Two micro-pigs (Micro-pigR, PWG Genetics Korea) were used. Each pig was about 12
months old and weighing around 44 kg. 31 cylindrical bone specimen were obtained from cancellous bone of condyles
for 3D analysis and measured by micro-computed tomography. Six parameters were trabecular thickness
(Tb.Th), bone specific surface (BS/BV), percent bone volume (BV/TV), structure model index (SMI), degree of anisotropy
(DA) and 3-dimensional fractal dimension (3DFD). Elastic moduli of three orthogonal directions (superiorinferior
(SI), medial-lateral (ML), andterior-posterior (AP) direction) were calculated through finite element analysis.
Results : Elastic modulus of superior-inferior direction was higher than those of other directions. Elastic moduli of
3 orthogonal directions showed different correlation with 3D architectural parameters. Elastic moduli of SI and ML
directions showed significant strong to moderate correlation with BV/TV, SMI and 3DFD.
Conclusion : Elastic modulus of cancellous bone of pig mandibular condyle was highest in the SI direction and it
was supposed that the change into plate-like structure of trabeculae was mainly affected by increase of trabeculae of
SI and ML directions. (Korean J Oral Maxillofac Radiol 2008; 38 : 81-7)
키워드
Architecture;Mandible;Micro-CT;Finite Element Analyses
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