A knee joint defect pad and its manufacturing method

A manufacturing method and knee joint technology, applied in the field of medical devices, can solve the problems of integration of the lower tibia and inability to increase the stress shielding phenomenon, and achieve the effects of reducing stress shielding, stress shielding effect, and elastic modulus

Active Publication Date: 2021-07-13
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a knee joint defect pad and its manufacturing method for the problems of increased stress shielding phenomenon and inability to complete osseointegration with the lower tibia existing in the existing total knee arthroplasty.

Method used

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  • A knee joint defect pad and its manufacturing method
  • A knee joint defect pad and its manufacturing method
  • A knee joint defect pad and its manufacturing method

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Embodiment Construction

[0031] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0032] In one of the examples, as image 3 Shown, the present invention discloses a kind of manufacturing method of knee joint defect block, and this manufacturing method comprises the following steps:

[0033] Step 1 S1, obtain the CT data of the patient's tibia, carry out three-dimensional reconstruction to the tibia according to the CT data in the Mimics software, obtain the tibia model, and export the tibia model to the Magics software in STL format;

[0034] Step 2 S2, scan the knee joint prosthesis, use Geomagic software to complete the reconstruction of the knee joint prosthesis model, and export the knee joint prosthesis model to the Magics software in STL format;

[0035] Step 3 S3. Complete the assembly of the tibial model and the knee joint prosthesis model in the Magics software, and manufacture the bo...

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Abstract

The invention relates to a knee joint defect pad and a manufacturing method thereof, comprising: obtaining a tibial model, exporting the tibial model to Magics software; reconstructing a knee joint prosthesis model, and exporting the knee joint prosthesis model to Magics software; completing The tibial model and knee joint prosthesis model were combined, and the medial bone defect of the tibial plateau was manufactured, the spacer was implanted, and the mesh was divided; in the Hypermesh software, the heterogeneous tibial model and the knee joint prosthesis model were combined Working conditions and constraints are applied to the overall model, and finite element analysis is performed; topology optimization analysis is performed, and if the optimized gradient mesh pad meets the preset change indicators, additive manufacturing is performed to obtain a knee joint defect pad. The knee joint defect cushion block of the present invention has a grid structure as a whole, which further reduces the elastic modulus, reduces stress shielding, facilitates the osseointegration of the cushion block and the lower tibia, and improves the stability of the knee joint prosthesis.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a knee joint defect pad and a manufacturing method thereof. Background technique [0002] Total knee arthroplasty (TKA) can effectively relieve pain and restore function in patients with advanced arthritis. In patients with severe knee osteoarthritis, varus deformity of the knee joint and bone defect of the tibial plateau are common, and when the bone defect is severe and noncontained (eg, figure 1 As shown), the conventional knee prosthesis is difficult to maintain stability. At this time, it is necessary to use a defect block to effectively fill the defect and maintain the stability of the prosthesis to ensure the therapeutic effect of total knee arthroplasty (such as figure 2 shown). [0003] However, at present, the materials used for knee prosthesis are mostly stainless steel, titanium and its alloys, and cobalt-chromium-molybdenum alloy. The elastic modulus of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/46
CPCA61F2/4644A61F2002/4663
Inventor 王金成韩青刘旸吴乃超张奥博陈昊
Owner JILIN UNIV
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