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STUDY ON MEASUREMENTS OF MECHANICAL PROPERTIES OF THE LONG BONE IN VIVO

Research Project

Project/Area Number 04670886
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Orthopaedic surgery
Research InstitutionSHINSHU UNIVERSITY

Principal Investigator

NAKATSUCHI Yukio  SHINSHU UNIVERSITY, SHOOL OF MEDICINE, UNIVERSITY HOSPITAL, LECTURER, 医学部・附属病院, 講師 (80115360)

Co-Investigator(Kenkyū-buntansha) NOMURA Akio  SHINSHU UNIVERSITY, FACULTY OF ENGINEERING, DEPARTMEPNT OF INFORMATION ENGINEERI, 工学部・情報工学科, 教授 (00115362)
TSUCHIKANE Akira  SHINSHU UNIVERSITY, SCHOOL OF MEDICINE, ASSISTANT, 医学部, 助手 (60252102)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1992: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsLong bone / Mechanical properties / Impulse response method / Fracture healing / Resonant frequency / Modal analysis / 振動モード / インパルス衝撃応答 / 固有振動数
Research Abstract

The vibration of long bones could be approximately compared to the free vibration of a beam with both ends unattached. The healing course of tibial fractures was assessed with sequential changes of resonance frequency measured through the impulse response method (IRM). Fifty-six tibial fractures were consecutively examined with IRM during the treatment. The fracture site was distributed from a proximal metaphysis to a distal one. Vibrations were generated by the impact of an impulse-hammer on the medial malleolus of the tibia. The vibrational response was detected on the medial tibial condyle with an accelerometer. Each signal was transmitted to a 2 channel waveform-analyzer. Most cases showed a steady increase of resonance frequency in fracture site without reaching the level of intact side. A decline of the frequency during treatment suggested a risky condition of the healing. An acute increase of the frequency was found in an initial stage fracture healing. The use of various materials such as a plate, Ender's nails, a Kuentcher's intramedullary nail and an external fixator for fracture fixation did not disturb the measurement of resonance frequency of the bone in vivo. It was useful in clinical practice to measure the primary mode in lateral direction of the tibia because of its higher amplitude than in antero-posterior direction. However, it is very important to distinguish the two separate bending modes by varying the direction of hammmering, because there is a discrepancy between their frequencies ; the former frequency was usually lower than the latter one. IRM has a possibility of wider application to the fractures treated by various methods of fixation and it will give orthopoaedic surgeons useful mechanical information on bone healing, especially when he considers the necessity of additional treatment in difficult cases.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 土金彰,中土幸男,野村彰夫: "インパルス衝撃法による正常人脛骨の力学的特性の加齢的変化" 日本臨床バイオメカニクス学会誌. 14. 173-176 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 土金彰,中土幸男,下川寛一,野村彰夫: "関節および軟部組織のヒト脛骨固有振動数への影響" 日本臨床バイオメカニクス学会誌. 15(印刷中). (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中土幸男: "長管骨の力学的特性に関する評価法の最近の進歩" 信州大学雑誌. 42(印刷中). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Akira Tsuchikane, Yukio Nakatsuchi, Akio Nomura: "Aging variation of mechanical properties in normal tibia examined by impulse response method" Journal of Japanese Society for Orthopaedic Biomechanics. 14. 173-176 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Akira Tsuchikane, Yukio Nakatsuchi, Kanichi Shimokawa, Akio Nomura: "Influence of joints and soft tissue on natural frequency of human tibia" Journal of Japanese Society for Orthopaedic Biomechanics. 15 : (in print). (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yukio Nakatsuchi: "Recent advances in measurements of mechanical property of the long bone" The Shinshu Medical Journal. 42 : (in print). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 古渡千桂,中土幸男,野村彰夫他4名: "インパルス衝撃法による長管骨骨折の治癒評価および健康人脛骨の力学的特性の生体内測定" 電子情報通信学会誌(信学技報). 92-51. 1-7 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 野村彰夫,村田和歌子他6名: "生体骨の音響診断における軟部組織の影響" 平成5年度電子情報通信学会信越支部大会. 389-390 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 小林昭一,野村彰夫他5名: "モーダル解析による生体骨の特性の評価" 平成5年度電子情報通信学会信越支部大会. 391-392 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 土金彰,中土幸男,野村彰夫: "インパルス衝撃法による正常人脛骨の力学的特性の加齢的変化" 日本臨床バイオメカニクス学会誌. 14. 173-176 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 土金彰,中土幸男他2名: "関節および軟部組織のヒト脛骨固有振動数への影響" 日本臨床バイオメカニクス学会誌. 15 (印刷中). (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中土幸男: "長管骨の力学的特性に関する評価法の最近の進歩" 信州医学雑誌. 42(印刷中). (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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