Optimum Design of Knee Prostheses with High Performance Similar to Natural Knee Joints

类似天然膝关节的高性能膝关节假体优化设计

基本信息

批准号：
01550120
负责人：
MURAKAMI Teruo
金额：
$ 1.34万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

The object of this research is to develop the approaches for the optimum design of knee prostheses with high performance similar to natural knee joints. What we are aiming at is to establish the adaptive multimode lubrication.The following methods were carried out.1. Three-dimensional analysis for the contact conditions in knee jointsThe optical visualization of fluid film formation between compliant material as artificial cartilage and transparent plate was carried out by mixing aluminium particles into lubricants. The fluid film profiles and contact zones were analyzed by means of CCD camera and image processing system. The low frictional behavior of gel film was observed for gelatin models lubricated with gelatin solution.2. Knee joint simulator testTo evaluate the fluid film formation in knee prostheses under walking condition, the knee joint simulator was developed and used for the measurement of electric resistance and friction between femoral and tibial components. In a knee prosthesis with an elastomeric tibial component lubricated with high visosity lubricatns, the elastohydrodynamic film was considerably formed even during the loading stance phase. It is suggested from the experimental results that the adaptive multimode lubrication is required to establish the long durability of the knee prosthesis with polyethylene tibial component, or lubricated with low viscosity lubricants.3. Clinical optimization in total knee replacementThe clinical results of four types of uncemented total knee prostheses were evaluated from the viewpoint of the geometrical design, instrumentations and postoperative fixation at the interface.

这项研究的目的是开发出具有类似于天然膝关节的高性能的膝盖假体的最佳设计方法。我们的目标是建立自适应多模润滑。进行以下方法。1。膝关节中接触条件的三维分析是通过将铝颗粒混合到润滑剂中进行的，作为人造软骨和透明板之间流体膜形成的光学可视化。通过CCD摄像头和图像处理系统分析流体膜轮廓和接触区。对于用明胶溶液润滑的明胶模型，观察到凝胶膜的低摩擦行为。2。膝关节模拟器测试以评估在步行条件下膝关节假体中的流体膜形成，开发了膝关节模拟器，并用于测量股骨和胫骨成分之间的电阻和摩擦。在膝关节假体中，弹性胫骨成分用高为腹部润滑的润滑，即使在加载姿势阶段，弹性水力动力膜也会大大形成。从实验结果中提出，自适应多模润滑需要建立用聚乙烯胫骨成分的膝盖假体的长耐用性，或用低粘度润滑剂润滑。3。总膝关节置换的临床优化是从几何设计，仪器和术后固定界面的观点评估了四种未元素的总膝盖假体的临床结果。