Abstract: A knee-joint endoprosthesis, which can be used for a knee-joint replacement operation, has a tibia component, a meniscus component and a screwed connection. The tibia component has a distal fastening portion and a proximal connecting portion. The distal fastening portion is configured for fastening to a proximal tibia. The meniscus component has a proximal sliding surface and a distal mating connecting portion. The proximal sliding surface is configured to articulate with a femoral joint component. The distal mating connecting portion is configured to form a joining connection with the proximal connecting portion of the tibia component. The screwed connection, which is configured for additional fixation of the joining connection, has a screw element inserted in a longitudinal bore of the meniscus component, and a mating screw element assigned to the tibia component. The screw element can be screwed to the mating screw element to form the screwed connection.

Abstract: The invention relates to a knee joint endoprosthesis has a tibia part, a femur part, a meniscus part arranged on the tibia part in mutually non-rotatable manner and a connecting device for connecting the tibia part to the femur part in articulated manner. Said femur part comprises at least one femur condyle having a femur condyle surface. Said meniscus part comprises at least one upper surface which faces the femur part and has at least one meniscus joint surface which touches the femur condyle surface of the at least one femur condyle. Said femur part and the tibia part are mounted such as to be rotatable relative to each other about a rotational axis.

Abstract: The invention relates to a knee joint endoprosthesis has a tibia part, a femur part, a meniscus part arranged on the tibia part in mutually non-rotatable manner and a connecting device for connecting the tibia part to the femur part in articulated manner. Said femur part comprises at least one femur condyle having a femur condyle surface. Said meniscus part comprises at least one upper surface which faces the femur part and has at least one meniscus joint surface which touches the femur condyle surface of the at least one femur condyle. Said femur part and the tibia part are mounted such as to be rotatable relative to each other about a rotational axis.