Patellofemoral joint prosthesis and manufacture method thereof

Abstract

The invention relates to the field of medical devices, and discloses a patellofemoral joint prosthesis and a manufacture method thereof. The patellofemoral joint prosthesis comprises a femur trochleaprosthesis body and a patella prosthesis body, wherein the femur trochlea prosthesis body comprises an internal condyle, an external condyle and a trochlear groove. The internal condyle and the external condyle are located on the two sides of the femur trochlea prosthesis body, and the trochlear groove is connected with the internal condyle and the external condyle, wherein the internal condyle and the external condyle are in cambered connection with the trochlear groove at different curvature radii, so that the junction surface formed by the internal condyle, the external condyle and the trochlear groove together forms a cooperative curved surface which cooperates with the patella prosthesis body. The femur trochlea prosthesis body further comprises a fixing surface which is formed on thefemur trochlea prosthesis body and is opposite to the cooperative curved surface, and a fixing assembly is formed on the fixing surface. The patella prosthesis body comprises a curved joint surface which cooperates with the cooperative curved surface, the top view of the section of the curved joint surface is elliptical, the front view of the section is in an unsymmetrical parabolic shape, and aconnection column is formed on the face, opposite to the curved joint surface, of the patella prosthesis body. The patellofemoral joint prosthesis is more suitable for Chinese in use.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a patellofemoral joint prosthesis and a manufacturing method thereof. Background technique [0002] Knee arthritis is a common, chronic, and progressive joint disease, accounting for more than 50% of osteoarthritis, of which patellofemoral osteoarthritis accounts for about 67% of knee arthritis. Total knee arthroplasty is an effective method for the treatment of advanced knee osteoarthritis, rheumatoid arthritis and other lesions. According to relevant statistics, nearly 600,000 people in the United States undergo total knee arthroplasty every year. In the past 10 years, with the continuous improvement of the medical insurance system, the number of patients undergoing total knee arthroplasty (TKA) in my country is also increasing year by year. However, TKA has large wounds and extensive tissue damage. For young patients with simple patellofemoral arthritis, patellofemoral arthropl...

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies of the existing technology, those skilled in the art are eager to find a patellar joint prosthesis and its manufacturing method suitable for Chinese characteristics, so as to avoid complications such as excessive packing of the patellofemoral joint and patellar snapping after surgery. disease

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