Basic Study of Lubrication in Artificial Joints with Compliant Materials

柔性材料人工关节润滑的基础研究

• 批准号: 05452407
• 负责人: IKEUCHI Ken
• 金额: $ 4.54万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452407/
• 关键词: Artificial Joint; Friction; Hydrodynamic lubrication; Start up friction; 混合潤滑; 衝撃荷重; ポリビニールアルコール・ハイドロゲル

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.

使用销盘摩擦测试装置测量顺应材料（硅橡胶、聚氨酯和聚乙烯醇水凝胶）与硬质光滑材料（不锈钢、氧化铝陶瓷和石英玻璃）的摩擦和润滑。结果表明，疏水性材料的启动摩擦力高于亲水性材料。启动后，与柔顺材料的摩擦力较低，并测量了表面粗糙度对摩擦力的影响。启动摩擦力取决于负载和作为润滑剂的滑液成分的静止时间。在用髋关节模拟器测量步行时润滑的流体压力时，足跟着地时的大部分冲击负载由流体压力支撑。根据测量的摩擦扭矩，在步行周期中，疏水材料的插座通常比亲水材料的插座产生更高的摩擦力。由于髋关节中的挤压膜效应，在高负载下摩擦系数较低。高含水量聚乙烯醇-水凝胶的插座由于配合表面之间的粘附而在高接触压力下导致高摩擦系数，并且摩擦力随着接触压力的减小而减小。当这种材料用于人工关节时，必须保持良好的润滑条件才能长期使用。

项目成果

速水尚: "人工関節軟骨PVAハイドロゲルの衝撃吸収機能に関する研究" 日本臨床バイオメカニクス学会. 14. 143-147 (1993)

Takashi Hayami：“人工关节软骨PVA水凝胶的减震功能研究”日本临床生物力学学会14. 143-147（1993）。

Ken Ikeuchi: "The relation between friction and creep deformation in articular cartilage" Disssipative Process in Trib.27. 247-252 (1994)

Ken Ikeuchi：“关节软骨摩擦与蠕变变形之间的关系”Trib.27 中的耗散过程。

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

Ken Ikeuchi：“关节软骨中摩擦与蠕变变形之间的关系”摩擦学中的耗散过程。

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)

Masanori Oka：“使用超高速摄像机实现关节减震机制的可视化（第二次报告）”日本骨科生物力学学会杂志 15. 169-171 (1994)。

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)

Ken Ikeuchi：“膝关节软骨和半月板的摩擦特性”日本骨科生物力学学会杂志 15. 183-186 (1994)。