Preparation method of light-cured 3D printing Thiessen polygon bionic structure tricalcium phosphate/silicon dioxide composite biological ceramic

A technology of composite bioceramics and Thiessen polygons, applied in the field of additive manufacturing, can solve the problems of low fracture toughness, high brittleness, and poor compressive resistance of tricalcium phosphate ceramics

Inactive Publication Date: 2020-10-27
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] However, the disadvantages of low fracture toughness, high brittleness, and poor compressive performance of tricalcium phosphate ceramics limit its application in the repair of load-bearing bone, cortical bone, and bone restorations with high mechanical performance requirements, and can only be used in small areas. Cancellous bone structure repair or as a composite matrix material

Method used

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  • Preparation method of light-cured 3D printing Thiessen polygon bionic structure tricalcium phosphate/silicon dioxide composite biological ceramic
  • Preparation method of light-cured 3D printing Thiessen polygon bionic structure tricalcium phosphate/silicon dioxide composite biological ceramic
  • Preparation method of light-cured 3D printing Thiessen polygon bionic structure tricalcium phosphate/silicon dioxide composite biological ceramic

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Embodiment 1

[0041] 1. Using Rhino 3D modeling software combined with Grasshopper parametric design platform, taking the bone trabecular structure between human cancellous bones as the bionic target, based on the 3D Thiessen polygon structure, and controlling the design porosity by changing the number of random points and the point spacing Bionic structural scaffolds ranging in size from 50%-80%.

[0042] 2. Configure the light-cured ceramic slurry required for printing under dark light conditions, and separate the β-TCP ceramic powder with an average particle size of 30 μm-50 μm, the silicon dioxide powder with a particle size of less than 0 nm, and the photosensitive resin with a wavelength of 405 nm. After weighing, put it into a beaker at a ratio of 0.3:0.0003:1 for magnetic stirring at room temperature and mix evenly at a speed of n=60r / min to obtain the initial mixed slurry A. Add the cross-linking agent 3,3-dimethacrylic acid to the mixed slurry A, and its mass ratio to the mixed sl...

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Abstract

The invention discloses a preparation method of a light-cured 3D printing Thiessen polygon bionic structure tricalcium phosphate / silicon dioxide composite biological ceramic, and belongs to the fieldof 3D printing ceramic and bionic structure design. The composition provided by the invention is prepared from tricalcium phosphate powder with an average particle size of 30-50microm, silicon dioxidepowder with a particle size of less than or equal to 100nm, 405nm waveband photosensitive resin, a cross-linking agent 3, 3-dimethylacrylic acid resin and a diluent polypropylene glycol according toa certain ratio. Through the printing forming and degreasing sintering process, the tricalcium phosphate / silicon dioxide bionic porous biological ceramic bone tissue engineering scaffold with compactgrain combination, porosity adjustable between 50% and 80% and compression resistance between 3MPa and 8MPa can be obtained, meets the compressive property requirement of human body cancellous bone and has the structural characteristic of bionic human body cancellous bone.

Description

technical field [0001] The invention relates to a 3D printing technology and a composite bioceramic, belonging to the field of additive manufacturing. Target, Thiessen Polygon is a tricalcium phosphate / silica composite bioceramic with biomimetic structure. Background technique [0002] Human bone is a complex multi-level pore structure composed of organic phase and inorganic phase, and its inorganic phase is mainly phosphor-based apatite formed by mineralization. The tricalcium phosphate ceramic material in tissue engineering scaffolds not only meets the three golden standards of bone grafts similar to autologous bone: osteogenicity; osteoconductivity; osteoinductivity, and the Ca-P ion ratio released after degradation is similar to that of human bone. Therefore, it can effectively promote bone tissue repair, and tricalcium phosphate materials have also become an important clinical choice for bone tissue repair materials. The molecular formula of tricalcium phosphate is Ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/447C04B35/622C04B35/626C04B35/638C04B35/64C04B38/00B28B1/00B28B17/02B28C3/00B33Y10/00B33Y40/00B33Y70/10B33Y80/00A61L27/12A61L27/10A61L27/56A61L27/50
CPCC04B35/447C04B35/622C04B35/6261C04B35/62625C04B35/638C04B35/64C04B38/00B28B1/001B28B17/026B28C3/00B33Y10/00B33Y40/00B33Y70/10B33Y80/00A61L27/12A61L27/10A61L27/56A61L27/50A61L2430/02C04B2235/3212C04B2235/3418C04B2235/5436C04B2235/5454C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/96C04B38/0074C04B38/0051
Inventor 陈继民刘思达
Owner BEIJING UNIV OF TECH
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