Lateral meniscus graft substitute with bone bridge-like fixation structure and manufacturing method

Abstract

The present invention relates to the technical field of medical devices, and provides a 3D printed lateral meniscus graft substitute with a bone bridge-like fixation 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 two, 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 lateral meniscus; step three, import the three-dimensional meniscus model into Geomagic The software performs the optimization process of the triangular surface to improve the smoothness of the model surface; step 4, import the three-dimensional meniscus model after the optimization process into SOLIDWORKS engineering software, and add a "bone bridge" structure between the front and rear corners; step 5, insert the The three-dimensional model of the meniscus with the "bone bridge" structure added is imported into the printer for 3D printing of the lateral meniscus graft substitute product.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically relates to a 3D printed lateral meniscus graft substitute with a bone bridge-like fixation structure and a manufacturing method thereof. Background technique [0002] The meniscus is a semilunar fibrocartilaginous tissue located between the femoral condyle and the tibial plateau, which performs functions such as absorbing shock, buffering decompression, lubricating, and maintaining joint stability. Meniscus injury is a relatively common clinical case. For mild meniscus injury, meniscus repair or plastic surgery can be used for treatment. However, for severe irreparable meniscal injury cases, such as complex meniscus tear or diffuse meniscus degeneration, the meniscus of these types of injuries has lost its original function. Severe joint pain or joint noose can lead to more serious secondary degeneration of joints, and even develop into osteoarthritis, seriously aff...

AI Technical Summary

Problems solved by technology

[0004] 1. The allogeneic lateral meniscus graft is derived from allogeneic tissue, and there is a risk of spreading diseases;

[0005] 2. The size of the allogeneic lateral meniscus graft cannot match the size of the patient's real lateral meniscus, 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 lateral meniscus transplantation, and remodeling will occur later, so the mechanical strength of the lateral meniscus will be affected, and ultimately affect the postoperative effect;

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

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