Anatomical form knee joint prosthesis with posterior cruciate ligament

Abstract

The invention belongs to the technical field of artificial joints, and particularly relates to a knee joint prosthesis with a posterior cruciate ligament. The anatomical form knee joint prosthesis with the posterior cruciate ligament comprises a femoral condyle and a tibial plateau pad, wherein the femoral condyle comprises entocondyle, lateral condyle and blocks, the entocondyle and the lateral condyle both are in the shape of C, and the intercondylar void is intercondylar fossa. The entocondyle and the lateral condyle are connected through the blocks, an inclined angle of the connecting lineof the lowest point of the entocondyle and the lowest point of the lateral condyle and the horizontal line is 3 degrees, and the tibial plateau pad comprises an entocondyle pit and a lateral condylepit to accommodate the entocondyle and the lateral condyle. According to the technical scheme, the pace of a postoperative patient is natural, the bending degree of the femoral condyle is increased, actions of going up and down stairs, deep squating, kneeling posture and the like are facilitated, and kneecap clicking and anterior knee pain can be reduced.

Description

technical field [0001] The invention belongs to the technical field of artificial joints, in particular to a knee joint prosthesis with posterior cruciate ligament preserved. Background technique [0002] Concepts and Terminology [0003] In order to correctly describe the shape, position and interrelationship of the human body structure, the present invention uses anatomical posture and orientation terms. [0004] Anatomical posture: body upright, eyes looking straight ahead; feet standing side by side, toes facing forward; upper limbs hanging on both sides of the torso, palms facing forward, thumbs on the outside. [0005] Up and down: head above, feet below. The limbs use proximal and distal to describe the relationship between parts, that is, the root close to the trunk is proximal, and the relatively far or terminal part is distal. [0006] Front and back: The front is the one leaning on the belly of the body, and the back is the one leaning on the back. In comparat...

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Problems solved by technology

[0023] In view of the deficiencies in the prior art, the purpose of the present invention is to overcome the poor matching, poor practicability, low postoperative patient satisfaction, loss of motor function, and interference of the prosthesis to soft tissues caused by the existing symmetrical knee prosthesis. Extrusion and other shortcomings, as well as the existing knee joint prosthesis to overcome the limitations of flexion and extension angle caused by the removal of the posterior cruciate ligament, severe column wear, poor proprioception of the patient, unnatural gait, etc. Anatomical Knee Prosthesis Preserving the Posterior Cruciate Ligament

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