7 results about "Trochlear groove" patented technology

Embodiments of the present application provide a femoral condyle prosthesis and a femoral prosthesis with the femoral condyle prosthesis. The femoral condyle prosthesis comprises a femoral condyle, which comprises a medial condyle and a lateral condyle for corresponding cooperation with a tibia, the medial condyle and the lateral condyle are connected to each other to form an anterior condylar surface, and a middle of the anterior condylar surface is recessed to form a trochlear groove for accommodating a patella, a line connecting the lowest points of the trochlear groove is a prosthesis patella trajectory line, and the prosthesis patella trajectory line is located outside a midpoint of an intercondylar notch at a position near the lowest point of the trochlear groove of the femoral condyle. Therefore, the femoral condyle prosthesis of the embodiments of the present application can greatly reduce the problem of knee pain in the large flexion movement of the knee joint.

A method of manufacturing an individual femoral knee arthroplasty component (1) for being implanted into a patient. The component (1) comprises a prosthetic trochlear groove. The method comprising the step of obtaining the orientation of a projection of the patient's individual spherical axis (17) onto a coronal reference plane that is at a dihedral angle of less than 25° relative to a spherical plane. The method further comprises the step of manufacturing the individual femoral knee arthroplasty component (1) such that if implanted as intended, the component's (1) prosthetic trochlea axis in the coronal reference plane is in valgus of the orientation of the projection of the patient's individual spherical axis (17) onto the coronal reference plane. The individual femoral knee arthroplasty component (1) is implanted in kinematic alignment.

Provided are a biological trochlear groove replacement assembly and a method for using same. The biological trochlear groove replacement assembly comprises a prosthesis (10), a test model (20), and a cushion block (30). The test model (20) has an upper surface generally fitting with the prosthesis (10) and a height identical to the prosthesis (10), and is configured for simulating the mounting posture of the prosthesis (10). An adjustment hole (22) provided on the test model (20) can facilitate the adjustment of the posture of the test model (20) while the test model (20) is preliminarily positioned. A positioning hole (21), a first positioning hole (31), and a second positioning hole (32) provided on the test model (20) and the cushion block (30) are configured for drilling mounting holes with a drill rod, such that the mounting of the cushion block (30) and the prosthesis (10) can be accurately directed, and the matching extent between the positions of the first mounting hole and the second mounting hole provided on the femoral section and a prosthesis mounting column is ensured, thereby ensuring that the prosthesis (10) can be mounted at the posture where the test model (20) is positioned, and effectively improving the success rate of the prosthesis implantation surgery.

This utility model relates to medical devices, specifically to an inserter and prosthesis for a biological trochlear groove replacement. The trochlear groove prosthesis includes a block-shaped prosthesis. The upper surface of the prosthesis is a continuous curved surface that is higher in the middle and lower at both ends along its length. A convex edge is arranged along the length of the prosthesis, and the upper edge of the convex edge is an arc shape that is higher in the middle and lower at both ends along the length of the prosthesis. The rate of curvature change of the upper edge of the convex edge is different from the rate of curvature change of the bottom surface of the trochlear groove. The lower end face of the block-shaped indenter on the inserter is provided with an arc-shaped convex surface, which forms a surface contact with the inner surface of the trochlear groove formed by the upper surface of the prosthesis. As a force-transmitting component that directly contacts the prosthesis, the indenter can avoid the existence of point contact, which can lead to excessive local stress and damage to the prosthesis. At the same time, it can effectively reduce the possibility of slippage between the indenter and the prosthesis.

A femoral implant includes a medial compartment, a lateral compartment and a trochlear groove in between the medial compartment and the lateral compartment. A central axis bifurcates the femoral implant and extends in a transverse plane perpendicular to a posterior condylar axis, the posterior condylar axis passing through a posterior-most point of the medial compartment and a posterior-most point of the lateral compartment. The trochlear groove is aligned on a trochlear groove axis that extends from the posterior condylar axis at a lateral angle relative to the central axis, the trochlear groove axis being in the transverse plane.

The invention belongs to the field of medical instruments, and provides a unicompartmental knee arthroplasty guide device which comprises a guide plate and a pressing plate, a guide hole is formed in the guide plate, and the guide plate is provided with a first attaching face used for being attached to the thighbone inner side condyle bone face; the pressing plate is connected with the guide plate and provided with a second attaching face used for being attached to the bone face of the front end of the thighbone tackle groove. By means of the thighbone inner side condyle bone surface and the thighbone trochlear groove front end bone surface, the guiding device has a large attaching range; the guiding device can be stably attached to the bone surface of the distal femur of a patient by utilizing the bony property between the front end of the femoral trochlear groove and the soft tissue of the front end of the femoral trochlear groove and the elastic state of the soft tissue of the distal femur when the knee joint is in the straightening state and the buckling state, and fixing nails do not need to be used or the using number of the fixing nails is reduced; therefore, the injury to the bones of the patient is effectively reduced.

Various embodiments relate to a femoral component for a knee prosthesis optimized for kinematic alignment surgical technique. The component includes an anterior flange having a length of about 40 mm to about 60 mm measured from a distal femoral reference point to an apex of the flange; a lateral flange defining a lateral flange angle of about 8 degrees to about 11 degrees, the angle measured between a line extending along the lateral flange and a line perpendicular to a reference line that connects the farthest distal points of the medial condyle and the lateral condyle; and a trochlear groove formed in the anterior flange. The trochlear groove has a width that remains substantially constant from about 0 degrees of flexion to about 30 degrees of flexion, with a tapering angle of about 1 degree to about 12 degrees.