Femoral prosthesis

Abstract

The invention provides a femoral prosthesis, which comprises a medial condyle, an external condyle and a trochlear groove arranged between the medial condyle and the external condyle, wherein the front-back diameter of the femoral prosthesis is AP, the left-right diameter of the femoral prosthesis is ML, the height of the paracondyloid of the femoral prosthesis is AH, the height of the hypocondyle of the medial condyle of the femoral prosthesis is MPH, and the height of the hypocondyle of the external condyle of the femoral prosthesis is LPH. The range of the ratio of the left-right diameter ML to the front-back diameter AP of the knee joint femoral prosthesis is 1.0-1.3, and the ratio is linearly decreased progressively along with increasing of the front-back diameter AP. The relation between the front-back diameter AP and the left-right diameter ML can be approximately fitted as ML / AP =-0.002 * AP + 1.25. According to the femoral prosthesis provided by the invention, the femoral prosthesis conforms to the anatomical structure of the human body, the coverage rate of the femoral prosthesis can be increased, and the probability of postoperative looseness and pain of the femoral prosthesis is reduced.

Description

technical field [0001] The invention relates to a femoral prosthesis, in particular to a femoral prosthesis used in the medical field. Background technique [0002] Knee osteoarthritis (OA) is a common chronic irreversible knee joint disease characterized by articular cartilage degeneration and secondary bone hyperplasia. It is a chronic damage to articular cartilage and surrounding soft tissues. Pain, stiffness, and loss of joint function are the hallmarks. OA has a very high incidence rate in the population. According to data studies, 9.6% of men and 18% of women in the world over the age of 60 have a certain degree of OA symptoms. With the acceleration of the aging process , coupled with the faster pace of life, the incidence of OA will be higher. [0003] Knee replacement is the mainstay of treatment for end-stage knee OA. Knee replacement is to use knee prosthesis to replace the diseased knee bone tissue, relieve or relieve pain, restore and reconstruct the function ...

AI Technical Summary

Problems solved by technology

[0004] Prosthesis loosening and postoperative pain are the main reasons for revision of knee arthroplasty, and poor prosthesis coverage is an important factor causing prosthesis loosening and postoperative pain. Insufficient prosthesis coverage means that the prosthesis cannot fully cover the cortical bone area. Without good support, it is easy to cause the prosthesis to sink and loosen after surgery; the prosthesis protrudes and interferes with the surrounding soft tissue, causing postoperative pain

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