Lateral meniscus transplantation substitute with bone bridge-shaped fixing structure and manufacturing method of lateral meniscus transplantation substitute

Abstract

The invention relates to the technical field of medical apparatus and instruments, and provides a 3D-printed lateral meniscus transplantation substitute with a bone bridge sample fixing structure and a manufacturing method thereof. The manufacturing method includes the following steps: 1, performing nuclear magnetic resonance shooting on a knee joint of a patient, and acquiring a nuclear magnetic two-dimensional image of the knee joint; 2, importing the nuclear magnetic two-dimensional image of the knee joint into medical reverse software Mimics, and constructing a three-dimensional model of a lateral meniscus; 3, importing the three-dimensional model of the lateral meniscus into Geomagic software for triangular patch optimization processing, so the surface smoothness of the model is improved; 4, importing the optimized three-dimensional model into SOLIDWORKS engineering software, and adding a'bone bridge' structure between an anterior angle and a posterior angle; 5, importing the three-dimensional model added with the bone bridge structure into a printer for 3D printing of an outer side meniscus transplantation 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...

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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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