| 摘要 |
PROBLEM TO BE SOLVED: To provide a knee prosthesis for more scrupulously reproducing the original stability and kinematics intrinsic to the knee. SOLUTION: The knee replacement system includes a femur part including a lateral condylar articulating portion and a medial condylar articulating portion, a tibia tray including an upper articulating surface, and a tibia insertion part. The tibia insertion part includes: (i) a first articulating portion for articulating with the lateral condylar articulating portion having a first condylar dwell point; (ii) a second articulating portion for articulating with the medial condylar articulating portion having a second condylar dwell point; (iii) a lower articulating surface for articulating with the upper articulating surface; and (iv) a coupling member to be connected to the tibia tray and defining an axis of rotation about which the tibial insert rotates with respect to the tibial tray. The axis of rotation crosses the upper articulating surface at a position posterior to a dwell axis when the dwell axis including the condylar dwell points is projected onto the upper articulating surface. COPYRIGHT: (C)2010,JPO&INPIT
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