Porous total knee prosthesis

Abstract

A porous total knee prosthesis comprises a femoral ankle prothesis, an artificial meniscus and a tibial tray prothesis, wherein a connection hole is formed in a solid main body part of the femoral ankle prothesis; a first porous fixing layer which can play a fixing role together with the femoral bone is arranged on the surface, combined with the femur of a patient, of the solid main body part in a covering manner; a structure wrapping the femoral end subjected to osteotomy is formed on the surface, opposite to the femur of the patient, of the first porous fixing layer, and two femoral articular surfaces are symmetrically arranged on the surface, back to the femur, of the first porous fixing layer; the artificial meniscus is provided with a protrusion matched with the connection hole and used for preventing the femoral ankle prothesis from dislocation, tibial articular surfaces matched with the femoral articular surfaces and a connection part matched with the tibial tray prothesis; and a locating part matched with the connection part is arranged at the upper end of the tibial tray prothesis, a second porous fixing layer is arranged on the outer surface of a supporting part at the lower end of the tibial tray prothesis in a covering manner, and a third porous fixing layer is arranged on the surface of a tibial bonding surface. The porous total knee prosthesis has a strong binding force with the femoral bone of the patient, facilitates growing-in of bone tissues and can achieve a relatively good biological fixation effect.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to any man-machine interactive (also known as passive) mechanical arm and ball joint locking method and device for a robot. Background technique [0002] Artificial knee arthroplasty has become a treatment for end-stage joint diseases and femoral neck fractures in the elderly, and it has significantly improved the quality of life of patients. Every year, about 1.5 million artificial joint replacement operations are performed on patients with joint loss of function caused by arthritis in the world. Artificial hip replacement can better relieve pain, improve joint function, restore joint stability and limb function, and has been recognized by the majority of patients. [0003] The human knee joint is subjected to tension, pressure, torsion, interface shear, repeated fatigue, wear and other forces under load. Therefore, it is required that the implanted tibial and femoral ankle prosthes...

AI Technical Summary

Problems solved by technology

[0009] Prospective studies have shown that the current biological fixation prosthesis has improved the early fixation effect, but the mid-term and long-term fixation effect has not improved, mainly due to the loosening and even failure of the prosthesis due to the peeling off, fracture of the coating, and the formation of particles.

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