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1994 Fiscal Year Final Research Report Summary

Basic Study of Lubrication in Artificial Joints with Compliant Materials

Research Project

Project/Area Number 05452407
Research Category

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

Allocation TypeSingle-year Grants
Research Field Biomedical engineering/Biological material science
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

IKEUCHI Ken  Kyoto University, Research Center for Biomedical Engineering, Professor, 生体医療工学研究センター, 教授 (30026223)

Co-Investigator(Kenkyū-buntansha) OKA Masanori  Kyoto University, Research Center for Biomedical Engineering, Professor, 生体医療工学研究センター, 教授 (20088537)
Project Period (FY) 1993 – 1994
KeywordsArtificial Joint / Friction / Hydrodynamic lubrication / Start up friction
Research Abstract

Friction and lubrication of compliant materials (Siliconrubber, Poly-urehtane and Polyvinylalcohol-hydrogel) versus hard and smooth mateials (Stainless steel, Alumina ceramic and Quartz glass) were measured with a pin-on disk friction testing apparatus. The results shows that start up friction with hydrophobic materials were higher than that with hydrophilic materials. After start up, friction with compliant materials was low and the effect of surface roughness on friction was measured. The start up friction was dependent on standstill time with load and constituents of synovial fluid as lubricant.
In the measurement of fluid pressure with a hip joint simulator for lubrication in walking, most of impusive load at heel strike was supported by the fluid pressure. According to the measured frictional torque, sockets of hydrophobic materials result higher friction than the socket of hydrophilic materials in general through the walking cycles. Frictional coefficient was low at high loading due to squeeze film effect in hip joints.
Socket of high water content Polyvinylalcohol-Hydrogel resulted high frictional coefficient under high contact pressure due to adhesion between the mating surfaces, and friction decreased with a decrease of contact pressure. When such material is used for an artificial joint, good lubrication condition must be maintained for long term application.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Ken Ikeuchi: "The Relation between Friction and Creep Deformation in Articular Cartilage" Dissipative Process in Tribology. 27. 247-252 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 池内 健: "膝関節軟骨と半月板の摩擦特性" 日本整形外科バイオメカニクス学会誌. 15. 183-186 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岡 正典: "海綿骨骨梁構造の力学特性と関節における機能" 日本整形外科バイオメカニクス学会誌. 15. 157-161 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岡 正典: "超高速カメラによる関節の衝撃吸収機構の可視化(第2報)" 日本整形外科バイオメカニクス学会誌. 15. 169-171 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ken Ikeuchi: "The relation between friction and creep deformation in articular cartilage" Disssipative Process in Trib.27. 247-252 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ken Ikeuchi: "Friction between articular cartilage and meniscus in the knee joint" Japanese J.Clinical Biomech.15. 183-186 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masanori Oka: "The mechanical behavior and functions of subchondral cancellous bone in human hip joint" Japanese J.Clinical Biomech.15. 157-161 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masanori Oka: "Visualization of shock absorbing mechanisms in joint tissues using an ultra high speed camera (Second Report)" Japanese J.Clinical Biomech.15. 169-171 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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