Saikko V, Paavolainen P, Kleimola M, Stätis P
Laboratory of Machine Design, Helsinki University of Technology, Espoo, Finland.
Proc Inst Mech Eng H. 1992;206(4):195-200. doi: 10.1243/PIME_PROC_1992_206_291_02.
The aim of the work has been the development of a hip joint simulator for comparative wear rate studies of long duration. A five-station apparatus has been designed, constructed and tested. Five total hip joints can be tested at the same time in identical conditions. The flexion-extension motion and the superior-inferior component of the joint contact force are incorporated. The motion is electromechanical and the loading pneumatic. The angle and load waveforms are fixed and simulate level walking. For accurate wear measurements each station employs a control prosthesis. The conditions of the control prosthesis in regard to loading, exposure to lubricant and environment temperature (37 +/- 1 degree C) are identical to those of the test prosthesis. The acetabular cups can be readily removed for periodic wear measurements and reassembled in exactly the original position. Extensive tests have shown that the simulator is a practical and reliable instrument in the wear rate studies of various designs of total hip joint.
这项工作的目的是开发一种用于长期比较磨损率研究的髋关节模拟器。设计、建造并测试了一种五工位装置。五个全髋关节可以在相同条件下同时进行测试。该装置纳入了屈伸运动以及关节接触力的上下分量。运动由机电驱动，加载由气动驱动。角度和载荷波形是固定的，模拟平步行走。为了进行精确的磨损测量，每个工位都使用一个对照假体。对照假体在加载、接触润滑剂和环境温度（37±1摄氏度）方面的条件与测试假体相同。髋臼杯可以很容易地拆卸下来进行定期磨损测量，并能精确地重新组装到原来的位置。大量测试表明，该模拟器在各种设计的全髋关节磨损率研究中是一种实用且可靠的仪器。
