Customized artificial semi-knee-joint and method of producing the same

Abstract

Customized hemi-knee joint prosthesis and a preparation method thereof are provided. Firstly, the normal side knee joint femur condyle data of a patient is extracted by CT for the medical image three-dimensional image reconstruction. The three-dimensional anatomy model of patient femur condyle is obtained by an antagonizing model. A metal femur condyle joint is obtained according to the three-dimensional anatomy model. Then, a rolling pillar is arranged in the metal femur condyle joint. The two sides of the rolling pillar are respectively opened with a cylindrical groove. A rolling combined station is sheathed on the rolling pillar. The two sides of the rolling combined station are respectively equipped with a side-push plate with a lug boss. The lug bosses of the side-push plates are inserted in the grooves of the rolling pillars. As the rolling pillar is arranged inside the articular surface of the metal femur condyle of the hemi-knee joint prosthesis, the prosthesis upper part, namely the rolling combined station, and the lower part, namely the articular surface of the metal femur condyle, which are fixed on a femoral shaft move relatively within a certain angle. Being corresponding to a tibia platform, the lower part is static during the period. Therefore, the whole process of the knee joint bending is finished and the abrasion of the prosthesis on the cartilage surface ofthe joint is reduced.

Description

technical field [0001] The invention relates to a metal prosthesis to solve the unequal length of the lower limbs, in particular to a customized half-knee joint for the replacement of the half-knee joint prosthesis for malignant bone tumors at the lower end of the femoral condyle after the reconstruction of the bone joint defect of the malignant bone tumor of the knee joint Prostheses and methods of making them. technical background [0002] The knee joint is an important organ for maintaining the basic living requirements of the human body such as standing, bearing weight, and walking, and it is also the most common site for malignant bone tumors. In order to solve the progressive limb length discrepancies after limb salvage surgery, the most commonly used reconstruction method is to use extendable prosthesis to reconstruct bone defects. However, multiple operations are required and patients suffer from large trauma (traditional extendable prosthesis), or disadvantages suc...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned shortcoming of the prior art, provide a kind of patient that is aimed at the bone tumor of femur lower end, only replace the femoral condyle part of knee joint during reconstruction, thereby can preserve the growth ability of tibial epiphysis, and solve the problem of knee joint to a certain extent. The unequal length of the lower limbs after joint malignant bone tumor surgery, a customized half-knee prosthesis that only replaces one side of the joint and its preparation method

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