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3D printed composite material active bone implant and forming method

A composite material and 3D printing technology, which is applied in the direction of solid material additive processing, prosthesis, additive processing, etc., can solve the problems of poor osteoinductivity, achieve weight reduction, good tensile strength and impact resistance, and improve extension performance effect

Active Publication Date: 2021-09-24
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a 3D printing composite material active bone implant and a molding method, which can effectively solve the problem of poor osteoinductivity of existing materials

Method used

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  • 3D printed composite material active bone implant and forming method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for forming a 3D printing composite active bone implant, comprising the steps of:

[0036] S1. Grinding the apatite-wollastonite microporous glass-ceramics, and then passing through screens with different meshes to obtain the first glass-ceramic powder with a particle size of 110 microns and the second glass-ceramic powder with a particle size of 35 microns. powder;

[0037] S2. Take 100 parts by weight of the first glass-ceramic powder, 75 parts by weight of the second glass-ceramic powder and 25 parts by weight of polylactic acid powder (with a particle size of 12 microns) for dry ball milling and mixing at a speed of 300 rpm to obtain the first powder mixture;

[0038] S3, adding 9 parts by weight of additives to the first mixture obtained in step S2, the additives include 2.25 parts by weight of MgO, 3.37 parts by weight of SiO 2 , 1.58 parts by weight of CaF 2 With the CaO of 1.8 parts by weight, the dry ball mill is mixed uniformly to obtain the second...

Embodiment 2

[0042] A method for forming a 3D printing composite active bone implant, comprising the steps of:

[0043] S1. Grinding the apatite-wollastonite microporous glass ceramics, and then passing through screens with different meshes to obtain the first glass ceramic powder with a particle size of 100 microns and the second glass ceramics with a particle size of 30 microns. powder;

[0044] S2. Take 100 parts by weight of the first glass-ceramic powder, 70 parts by weight of the second glass-ceramic powder and 20 parts by weight of polylactic acid powder (with a particle size of 10 microns) for dry ball milling and mixing at a speed of 300 rpm to obtain the first powder mixture;

[0045] S3, adding 8 parts by weight of additives to the first mixture obtained in step S2, the additives include 2.7 parts by weight of MgO, 2.7 parts by weight of SiO 2 , 1.3 parts by weight of CaF 2 With the CaO of 1.3 parts by weight, the dry ball mill is mixed uniformly to obtain the second powder m...

Embodiment 3

[0049] A method for forming a 3D printing composite active bone implant, comprising the steps of:

[0050] S1. Grinding the apatite-wollastonite microporous glass-ceramics, and then passing through screens of different meshes to obtain the first glass-ceramic powder with a particle size of 120 microns and the second glass-ceramic powder with a particle size of 40 microns. powder;

[0051]S2. Take 100 parts by weight of the first glass-ceramic powder, 80 parts by weight of the second glass-ceramic powder and 30 parts by weight of polylactic acid powder (with a particle size of 14 microns) for dry ball milling and mixing at a speed of 300 rpm to obtain the first powder mixture;

[0052] S3, adding 10 parts by weight of additives to the first mixture obtained in step S2, the additives include 2 parts by weight of MgO, 4 parts by weight of SiO 2 , 2 parts by weight of CaF 2 and 2 parts by weight of CaO, dry ball milling and mixing to obtain the second powder mixture;

[0053] ...

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Abstract

The invention provides a forming method of a 3D printed composite material active bone implant, which comprises the following steps of: S1, grinding apatite-wollastonite microporous glass ceramic, and then respectively enabling the glass ceramic to pass through screens with different mesh numbers to respectively obtain first glass ceramic powder and second glass ceramic powder; S2, ball-milling and mixing the first glass ceramic powder and the second glass ceramic powder obtained in the step S1 with polylactic acid powder to obtain a first powder mixture; S3, adding an additive into the first mixture obtained in the step S2, and performing ball milling and mixing to obtain a second powder mixture; S4, adding an adhesive into the second powder mixture obtained in the step S3, and performing ball milling and mixing to obtain a third powder mixture; and S5, printing and forming the third powder mixture obtained in the step S4 by utilizing a laser 3D printing technology to obtain the composite material active bone implant. The prepared material has good tensile strength, ductility and impact resistance.

Description

technical field [0001] The invention relates to the technical field of medical device manufacturing, in particular to a 3D printed composite active bone implant and a molding method. Background technique [0002] In recent years, the loss or dysfunction of human tissue caused by the aging of the social population and traffic accidents in my country is increasing. When the critical size of bone defect is usually exceeded, endogenous repair is very limited, especially in complex fractures. And in cases of disease, bone grafting is unavoidable. Titanium and titanium alloys are widely used in orthopedics because of their good mechanical properties, corrosion resistance and biocompatibility. However, due to some defects of titanium implant itself, it is difficult to achieve perfect therapeutic effect in clinical application, such as low strength, poor extensibility, poor impact resistance and so on. Contents of the invention [0003] The invention provides a 3D printing compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/18C04B38/00B33Y70/10B33Y10/00B29C64/153A61L27/10A61L27/12A61L27/18A61L27/50A61L27/56
CPCC04B26/18C04B38/00B33Y10/00B33Y70/10B29C64/153A61L27/12A61L27/10A61L27/18A61L27/56A61L27/50C04B2111/40A61L2430/02C04B14/22C04B2103/44C08L67/04
Inventor 罗乙娲焦树强王明涌涂继国
Owner UNIV OF SCI & TECH BEIJING