ARTIFICIAL KNEE JOINT
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Accused Products
Abstract
The present invention provides an artificial knee joint that can reconstruct an anterior cruciate ligament in a state close to an original function. An artificial knee joint (1) that is used in a total knee replacement includes a femur member (10) and a tibia member (20). The tibia member (20) has a ligament insertion hole (20h) which pierces the tibia member (20) and which is formed at a position where once an anterior cruciate ligament (ACL) exists in a knee replaced for the artificial knee joint (1). Therefore, a ligament can be provided such that a distal end (DT) of a femur (F) and a proximal end (PE) of a tibia (T) are joined to each other by passing the ligament through the ligament insertion hole (20h), which allows the anterior cruciate ligament (ACL) to be reconstructed so as to be in the substantially same state as a knee replaced for the artificial knee joint (1).
8 Citations
17 Claims
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1-9. -9. (canceled)
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10. An artificial knee joint that is used in a total knee replacement to join a femur and a tibia to each other using a reconstruction ligament formed by a plurality of bundles of reconstruction ligaments, the artificial knee joint comprising:
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a femur member mounted on a femur distal end; and a tibia member mounted on a tibia proximal end, wherein a medial condyle and a lateral condyle are provided in the tibia member, the medial condyle and the lateral condyle of the tibia member being in contact with a medial condyle and a lateral condyle of the femur member, respectively, a ligament insertion hole piercing the tibia member and an intercondylar eminence are provided between the medial condyle and the lateral condyle of the tibia member, the ligament insertion hole is provided at a position where once an anterior cruciate ligament exists in a knee replaced for the artificial knee joint, the intercondylar eminence is formed between the ligament insertion hole and a notch provided in a rear portion of the tibia member, a height of the intercondylar eminence is substantially equal to a height of an intercondylar eminence in the knee replaced for the artificial knee joint, and a recess anteroposteriorly extending along the artificial knee joint is provided at a leading end of the intercondylar eminence such that an interference state changes in each bundle of reconstruction ligaments of a reconstruction anterior cruciate ligament when the knee is bent and stretched while replaced for the artificial knee joint to provide the reconstruction anterior cruciate ligament formed by the plurality of bundles of reconstruction ligaments. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification