Abstract: An artificial articulation having stable fixing means for unicompartmental knee arthroplasty is stably attached to the top of a tibia in order to permit a sliding motion of an artificial joint attached to the bottom of a femur. The artificial articulation includes an implant hat part which a curved surface structure that makes surface contact with the artificial joint attached to the bottom of the femur is formed on an upper surface thereof, and protrusions protruding by a predetermined height in a direction of the top of the tibia are formed in large numbers on a lower surface thereof, and a distally extending stem configured to be formed to protrude downward by a predetermined length from the lower surface of the implant hat part, and to be inserted into the tibia by a predetermined depth from the top of the tibia and attached thereto.

Abstract: Proposed is a bearing component for an artificial knee joint, the bearing component including a body part, whose plane shape is oval, having an indentation portion formed by depressing a posterior center to a predetermined depth toward a center of the body part, a protruding portion protruding from an upper surface of the body part and introduced into an opening of a femoral component, a coupling portion provided on a lower surface of the body part, and having an engagement surface of a certain height to form a step difference with an outer circumferential surface of the body part, the engagement surface being formed on left and right sides of the coupling portion, and being not formed on an indentation surface, and a fastening portion having a plurality of coupling protrusions formed in a portion where the engagement surface of the coupling portion is not formed.