Preartis-matching femoral prosthesis for artificial knee joint

Abstract

The invention relates to a preartis-matching femoral prosthesis for an artificial knee joint. The preartis-matching femoral prosthesis comprises an internal condyle, an external condyle, an anterior wing, a pulley and a posterior condyle. The anterior wing is formed by extending inwardly from front ends of the internal condyle and the external condyle to be connected with the pulley. The posterior condyle is formed in such a manner that the internal condyle and the external condyle extend inwardly and connected. An intercondylar fossa is defined between the internal condyle and the external condyle. The thickness of the anterior wing is in negative relationship with front and back diameters of the anterior wing and the posterior condyle.The preartis-matching femoral prosthesis for the artificial knee joint has following beneficial effects: the thickness of the anterior wing is on decrease step by step along with the increase of the front and back diameters of the prosthesis so that characteristics of the femoral anatomy are obtained; mechanical properties of patellofemoral joints are improved and excessive filling or insufficient filing in front of femurs are overcome; complications such as anterior knee pains and obstacles for joint range of motion are reduced; and postsurgical clinic effect is raised.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an anterior condyle matching type artificial knee joint femoral prosthesis. Background technique [0002] Total knee arthroplasty is a very mature orthopedic surgery that should be carried out widely. It has become an effective method for the treatment of advanced osteoarthritis. It can relieve patients' pain, improve function, and improve the quality of life. At present, the 10-15-year survival rate of artificial knee prosthesis can reach 85%-90%, which is closely related to the surgical technique and prosthesis design. Artificial knee replacement has been developed for more than 40 years, and the surgical technology has been quite mature. Further improvement of prosthetic design has become the main issue to improve the life of artificial knee joint and improve the postoperative effect. The design of artificial knee joint prosthesis has developed rapidly in recent years...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, aiming at the defects that the front wing design of the existing artificial knee femoral prosthesis easily leads to overfilling or underfilling of the front of the femur, it provides a prosthetic front wing thickness that increases with the increase in the anteroposterior diameter of the prosthesis. Large and gradually reduced anterior condyle matching artificial knee femoral prosthesis, making it more in line with the anatomical characteristics of the Chinese anterior femoral condyle

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