Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지

The relationship between 3D bone architectural parameters and elastic moduli of three orthogonal directions predicted from finite elements analysis

돼지 하악 과두의 해면골에서 유한요소분석법으로 예측한 방향에 따른 탄성율과 3차원 골 미세지표 간의 상관관계

  • Park, Kwan-Soo (Department of Oral and Maxillofacial Radiology, School of Dentistry, Seoul National University, and Department of Dentistry, Inje University Sanggye Paik Hospital) ;
  • Lee, Sam-Sun (Department of Oral and Maxillofacial Radiology, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Huh, Kyung-Hoe (Department of Oral and Maxillofacial Radiology, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Yi, Won-Jin (Department of Oral and Maxillofacial Radiology, Dental Research Institute and BK21, School of Dentistry, Seoul National University) ;
  • Heo, Min-Suk (Department of Oral and Maxillofacial Radiology, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Choi, Soon-Chul (Department of Oral and Maxillofacial Radiology, Dental Research Institute, School of Dentistry, Seoul National University)
  • 박관수 (서울대학교 치의학대학원 구강악안면방사선학교실, 인제대학교 상계백병원 치과학교실) ;
  • 이삼선 (서울대학교 치의학대학원 구강악안면방사선학교실, 치학연구소) ;
  • 허경회 (서울대학교 치의학대학원 구강악안면방사선학교실, 치학연구소) ;
  • 이원진 (서울대학교 치의학대학원 구강악안면방사선학교실, 치학연구소 및 BK21) ;
  • 허민석 (서울대학교 치의학대학원 구강악안면방사선학교실, 치학연구소) ;
  • 최순철 (서울대학교 치의학대학원 구강악안면방사선학교실, 치학연구소)
  • Published : 2008.06.30
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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-$pig^R$, 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 (superior-inferior (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.

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