A solid polyurethane meniscus graft substitute and its manufacturing method

Abstract

The present invention relates to the technical field of medical devices, and provides a solid polyurethane meniscus graft substitute and a manufacturing method thereof, comprising the following steps: step 1, performing nuclear magnetic resonance imaging on the patient's knee joint to obtain a two-dimensional nuclear magnetic image of the knee joint; Step 2. Import the MRI 2D image of the knee joint into the medical reverse software Mimics to construct a 3D model of the meniscus; Step 3. Import the 3D model of the meniscus into the Geomagic software for triangle surface optimization processing to improve the surface smoothness of the model; Step 4. Import the optimized 3D model of the meniscus into SOLIDWORKS engineering software, and add cylindrical embolus structures at the anterior and posterior corners of the meniscus respectively; Step 5, import the 3D model of the meniscus with the cylindrical embolus structure added in Step 4 into the UG design software for Turn over the mold and make a three-dimensional model of the mold; step six, finally make a meniscus mold model according to the three-dimensional model of the mold, and manufacture the solid polyurethane meniscus graft substitute according to the meniscus mold model.

Description

Technical field [0001] The present invention relates to the field of medical devices, and more particularly to a solid polyurethane semi-moon plate transplant substitute and its production method thereof. Background technique [0002] The half-month board is a half-month fiber cartilage tissue between the femoral condyle and the tibial plate, which is divided into the inner and outer half-moon. The half-moon board is a semi-annular structure, which presents an outer periphery, a wedge-shaped structure, a half-moon plate surface, and a femoral condyle, flat, flat, and the tibial platform. Half-month toughness and elasticity, the impact of femoral condyle and tibial platform two bones when the joint movement can be buffered, and it is functions such as absorption, buffering decompression, lubrication joint, maintenance of joint stability. [0003] However, as the current frequency and intensity of people participate in the movement, the incidence of meniscus damage is constantly ri...

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Problems solved by technology

[0005] However, because the appearance and structure of the above-mentioned meniscus substitute products are disc-shaped, which is quite different from the half-moon structure of the natural meniscus, it cannot simulate the function of the normal meniscus; the anterior and posterior horns of the normal meniscus are attached and fixed to the tibia through ligaments On the platform, the periphery is connected with the joint capsule and synovium, and the above-mentioned meniscus substitute products are not fixed on the bony structure or soft tissue, and are in a floating and free state, which easily leads to the following two problems: First, the lack of meniscus substitute products Good fixation and dislocation; second, the movement pattern of the meniscus substitute in the joint is quite different from that of the natural meniscus, and it cannot simulate the mechanical conduction function of the normal meniscus, so its cartilage protection effect remains to be discussed

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