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New Assessment of Trabecular Bone Mechanical Properties by Intraoral

Research Project

Project/Area Number 14370635
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionShowa University

Principal Investigator

SATO Yuuji  Showa University, School of Dentistry, professor, 歯学部, 教授 (70187251)

Co-Investigator(Kenkyū-buntansha) KIM Sootaek  Showa University, School of Dentistry, Assistant Professor, 歯学部, 講師 (00205048)
KITAGAWA Noboru  Showa University, School of Dentistry, Associate Professor, 歯学部, 助教授 (80177831)
TSUMITA Masakazu  Showa University, School of Dentistry, Associate Professor, 歯学部, 助教授 (00138504)
AKAGAWA Yasumasa  Hiroshima University, Department of Advanced Prosthodontics Graduate School of Biomedical Sciences, Professor, 大学院・医歯薬総合研究科, 教授 (00127599)
YAMAGATA Tetsuya  Showa University, School of Dentistry, Assistant, 歯学部, 助手 (40317582)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥10,700,000 (Direct Cost: ¥10,700,000)
Fiscal Year 2003: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2002: ¥6,600,000 (Direct Cost: ¥6,600,000)
KeywordsOral implantology / retro-0reflective markers / Biomechanics / Intraoral radiograph / trabecular bone / micro-CT image / three-dimensional finite element model / mechanical properties / 二次元有限要素モデル
Research Abstract

The purpose of this study was to develop a new method which quantitatively assesses mechanical properties of trabecular bone of the jaws by intraoral radiographs. Methods: 4 bone blocks (20*15 mm) were dissected from mandibular edentulous area obtained from two adult monkeys. Intraoral radiographs of these blocks were taken with 60 kV and 6.4 mAs. Parameters of trabecular bone structure were determined as follows; trabecular area (T.Ar), trabecular surface length (TSL), trabecular number (Tb.N), number of node (N.Nd), number of terminus (N.Trn), and fractal dimension (FD). 4 bone blocks were serially scanned by micro-CT with slice thickness of 0.08 mm. A three-dimensional finite element model was created from micro-CT images and elastic modulus of mechanical properties was also calculated. Parameters of trabecular bone structure in a total of 16 regions obtained from 4 bone blocks were compared with elastic modulus. Results Significant positive correlations were found among TAr, N.Nd and elastic modulus. (P<0.05). Significant negative correlations were found among Tb.N, N.Tm, FD and elastic modulus (P<0.05). However, there was no significant correlation between TSL and elastic modulus. Multiple regression analysis revealed that elastic modulus was explained by T.Ar and FD [elastic modulus=0.07 * T.Ar -5.08 * FD + 6.85] (R square = 0.91, P<0.000 1).Conclusion: Our results suggest that mechanical properties of trabecular bone of the jaws may be quantitatively assessed by intraoral radiographs.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 永井伸郎: "口内法X線写真による海綿骨力学的特性の推定"補綴誌. 47・109回特別号. 60 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nagai Noburou: "Estimation of Cancellous Bone Mechanical Properties Using Intra-oral Radiography."J Jpn Prosthodont Soc 47.109^<th> Special Issu. 60. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Akagawa Yasumasa: "A mimic osseointegrated implant model for three-dimensional finite element analysis"J Oral Rehabilitation. 30(1). 41-45 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 永井伸郎: "口内法X線写真による海綿骨力学的特性の推定"補綴誌. 47・109回特別号. 60 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Akagawa, Y.: "A mimic osseointegrated implant - model for three-dimensional finite element analysis"Journal of Oral Rehabilitation. 30(1). 41-45 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Akagawa, Y.: "A mimic osseointegrated implant model for three-dimensional finite element analysis"Journal of Oral Rehabilitation. Jan;30(1). 41-45 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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