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Additive Manufacturing Scaffold Combined with Gel Casting Method for Porous Calcium Phosphate Ceramics

A porous calcium phosphate, additive manufacturing technology, applied in ceramic products, manufacturing tools, additive processing and other directions, can solve the problems of mechanically unstable ceramic bodies, poor adhesion, ceramic cracking, etc., to achieve good biological properties, Good mechanical properties, the effect of improving mechanical properties

Active Publication Date: 2020-09-08
陶合体科技(苏州)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the additive manufacturing technology builds ceramics by layering materials, this leads to poor connection at the ceramic connection points between the constructed ceramic layers and layers, which leads to low mechanical strength of the prepared ceramics; and in In the layer-by-layer stacking process, due to the asynchronous molding of the ceramics, it is easy to produce a mechanically unstable ceramic body, which easily leads to ceramic cracking and other phenomena.
In addition, the current use of additive manufacturing to directly and rapidly form ceramic powders leads to poor bonding between the ceramic powder particles in the formed porous ceramic body, which also greatly affects the mechanical strength of porous calcium phosphate ceramics

Method used

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  • Additive Manufacturing Scaffold Combined with Gel Casting Method for Porous Calcium Phosphate Ceramics
  • Additive Manufacturing Scaffold Combined with Gel Casting Method for Porous Calcium Phosphate Ceramics
  • Additive Manufacturing Scaffold Combined with Gel Casting Method for Porous Calcium Phosphate Ceramics

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Experimental program
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Effect test

Embodiment 1

[0031] According to step A) of the present invention, using fused deposition modeling (FDM) additive manufacturing printer and polylactic acid as consumables to manufacture such as figure 1 A polylactic acid porous scaffold template with a pore size of 500 microns and through holes;

[0032] Step B), put 3.0 grams of water, 3.0 grams of hydroxyapatite particles, 0.025 grams of dispersant sodium polyacrylate, 0.1 grams of binder hydroxypropyl methylcellulose, 0.2 grams of acrylamide monomer, 0.033 grams of N,N - methylene-bisacrylamide crosslinking agent, 0.010 g of ammonium persulfate and 0.015 g of tetramethylethylenediamine are fully mixed to obtain a mixture M;

[0033] Step C), pouring the mixture M into the porous stent template, and then reacting for 24 hours in a nitrogen protection environment with a temperature of 50°C and a humidity of 90%, to obtain a porous stent template / ceramic body;

[0034] Step D), soak the porous support template / ceramic body in dichlorometh...

Embodiment 2

[0037] Using ABS as the printing consumable, other preparation conditions were the same as in Example 1, and a porous hydroxyapatite ceramic with a pore size of 400 microns and three-dimensionally interconnected pores was obtained.

Embodiment 3

[0039]Tricalcium phosphate was used as calcium phosphate particles, and other preparation conditions were the same as in Example 1 to obtain porous tricalcium phosphate ceramics with pores of 400 microns and three-dimensionally interconnected pores.

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Abstract

The invention relates to a preparation method of a porous calcium phosphate ceramic, and belongs to the technical field of preparation of a porous bioceramic. The method is characterized in that the porous calcium phosphate ceramic is prepared by using a porous scaffold manufactured by an additive manufacturing technology as a template in combination with a gel casting method. According to the invention, the preparation technology can effectively overcome adverse factors produced due to layer-by-layer superimposed manufacturing in an additive manufacturing technology process and an adverse factor that ceramic particles can not be closely connected in a direct printing process of ceramic powder; and the porous calcium phosphate ceramic which is formed in one step and has mechanical stability and favorable mechanical property can be obtained.

Description

technical field [0001] The invention relates to a preparation method of porous calcium phosphate ceramics, belonging to the technical field of preparation of porous bioceramics. Background technique [0002] Because of its similarity to the inorganic mineral composition of bone, calcium phosphate has always been the material of choice for bone defect repair. In practical applications, it is usually necessary to process calcium phosphate into ceramics with a porous structure. The reason why calcium phosphate needs to be processed into a porous structure is that suitable pores are not only conducive to bone tissue ingrowth and host osseointegration, but also can greatly improve the bioactivity of ceramics. In order to obtain porous calcium phosphate ceramics with good biological properties, so far, different techniques for preparing porous calcium phosphate ceramics have been reported, such as using pore-forming agent template method (Chinese Patent No. 200710016725.X, 031355...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/42C04B35/447C04B38/06C04B35/624B28B1/14B33Y80/00
CPCB28B1/14B33Y80/00C04B35/447C04B35/624C04B38/062C04B38/0003C04B38/0054
Inventor 洪友良武祯
Owner 陶合体科技(苏州)有限责任公司
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