Abstract: A femur size measuring device include a stylus part including a stylus arm and a stylus holder, an anterior posterior (AP) sizer part having the stylus part coupled to an upper end, a pair of paddles at a lower portion, and an anterior pin guide mount and a posterior pin guide mount, a plurality of anterior pin guides mounted to be replaceable in the anterior pin guide mount, configured to determine insertion positions of a pair of anterior position determination pins for determining a rotation position of a femur cutting guide, and configured to guide the anterior position determination pins, and a plurality of posterior pin guides mounted to be replaceable in the posterior pin guide mount, configured to determine insertion positions of a pair of posterior position determination pins for determining a rotation position of a femur cutting guide, and configured to guide the posterior position determination pins.

Abstract: Proposed is a method of reconstructing a damaged cartilage of a distal femur to a pre-damaged state for the design of a patient-specific artificial knee joint. The method includes generating a distal femur model (A) having only a bone without a cartilage from image data of a femur captured by a medical imaging device, generating a distal femur model (B) having a damaged cartilage from the image data, extracting a bone cross section for each region in each of the model (A) and the model (B), obtaining a distance between an articular surface of the model (A) and a cartilage surface of the model (B) by using a bone cross section of the model (A) and a bone cross section of the model (B) which are extracted from the same region, and generating a distal femur model (C) with a cartilage reconstructed according to a reconstruction line.

Abstract: Proposed is an artificial knee joint replacement. The artificial knee joint replacement includes a tibial component directly fixed to a bone resection surface of tibia and configured to have a protrusion portion protruding from an upper fastening surface thereof, and a bearing component interposed between a femoral component directly fixed to a bone resection surface of femur and the tibial component, and configured to have an accommodation portion formed on a lower fastening surface thereof to correspond to the protrusion portion, wherein the protrusion portion consists of two protrusions spaced apart from each other along a first direction reference line of the tibial component, and the accommodation portion consists of grooves formed in a structure that is continuous with each other along a first direction reference line of the bearing component.

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.