Medial meniscus graft substitute with mortise and tenon structure and its manufacturing method

Abstract

The present invention relates to the technical field of medical devices, and provides a 3D printed medial meniscus graft substitute with a mortise-and-tenon structure and a manufacturing method thereof, comprising the following steps: step 1, performing nuclear magnetic resonance imaging on the patient's knee joint, Obtain the two-dimensional nuclear magnetic image of the knee joint; Step 2, import the two-dimensional nuclear magnetic image of the knee joint into the medical reverse software Mimics, and construct a three-dimensional model of the inner meniscus; Step three, import the three-dimensional model of the inner meniscus into Geomagic software optimizes the triangular surface to improve the surface smoothness of the model; step 4, import the optimized 3D model of the medial meniscus into SOLIDWORKS engineering software, and add a "mortise and tenon" like embolic structure between the front and back corners Step 5. Import the three-dimensional model of the medial meniscus with the "mortise and tenon"-like embolic structure into the printer for 3D printing of medial meniscus graft substitute products.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically, relates to a 3D printed medial meniscus graft substitute with a mortise-and-tenon structure and a manufacturing method thereof. Background technique [0002] The meniscus is a half-moon-shaped fibrocartilage tissue located between the femoral condyle and the tibial plateau. It plays the functions of absorbing shock, buffering decompression, lubrication, and maintaining joint stability. However, with the increasing frequency and intensity of people participating in sports , The incidence of meniscus injury is also increasing. Currently, for mild meniscus injury, arthroscopic meniscus repair or plastic surgery can be used for treatment, which can relieve symptoms. However, for more serious cases of meniscal injury, such as complex tears of the meniscus that cannot be repaired, and cases of knee pain symptoms after meniscus surgery, meniscus replacement is the only way...

AI Technical Summary

Problems solved by technology

[0004] 1. Because the allogeneic meniscus grafts are derived from allogeneic tissues, there is a risk of spreading diseases;

[0005] 2. The size of the allogeneic meniscus graft cannot match the real meniscus size of the patient, and this size difference will bring uncertainty to the operation and postoperative effect;

[0006] 3. Tissue necrosis will occur in the early stage of allogeneic meniscus grafts transplanted into the body, and remodeling will occur later, so the mechanical strength of the meniscus will be affected, and ultimately affect the postoperative effect;

[0007] 4. Allogeneic meniscus grafts are required to be obtained from fresh cadaver specimens, and our country itself lacks donors, which makes allogeneic meniscus grafts more scarce and cannot be carried out on a large scale in China

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