Shaping method of nanometer bioceramic artificial joint

A technology of bioceramics and artificial joints, applied in medical science, prosthesis and other directions, can solve the problems of difficult preparation and processing of complex-shaped ceramic parts, and achieve the effect of shortening the processing cycle, simple forming process and small processing allowance.

Inactive Publication Date: 2008-03-05
HARBIN MEDICAL UNIVERSITY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the difficult problem of preparation and processing of ceramic parts with complex shapes, the present invention provides a method for forming artificial joints of nano-bioceramics

Method used

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  • Shaping method of nanometer bioceramic artificial joint
  • Shaping method of nanometer bioceramic artificial joint

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0018] Specific implementation mode 1: In this implementation mode, the preparation and forming process of nano-biological ceramic materials are completed according to the following steps:

[0019] 1. Preparation of Al by alcohol-water solution heating method 2 o 3 , ZrO 2 Nano powder. When the alcohol-water solution is heated, a gel-like precipitate is produced in the solution, and the following hydrolysis reaction occurs:

[0020] 4ZrOCl 2 +6H 2 O→Zr 4 o 2 (OH) 8 Cl 4 +4HCl(1),

[0021] Al 3+ +3H 2 O→Al(OH) 3 +3H + (2).

[0022] Al(NO 3 ) 3 9H 2 O, ZrOCl 2 ·8H 2 O and Y (NO 3 ) 3 ·6H 2 O is formulated into a mixed solution with a certain molar concentration by molar ratio, adding absolute ethanol at a ratio of alcohol to water of 5:1, and adding a certain amount of polyethylene glycol 200 and polyethylene glycol 1540 as a dispersant. The solution was placed in a constant temperature water bath and slowly heated to 75°C, and kept at this temperature for...

specific Embodiment approach 2

[0030] Specific implementation mode two: this implementation mode completes the preparation and forming process of nano-biological ceramic materials according to the following steps:

[0031] 1. Prepare hydroxyapatite HAP powder by chemical precipitation method.

[0032] The chemical reaction equation of hydroxyapatite is as follows:

[0033] (NH 4 ) 2 HPO 4 +NH 3 ·H 2 O→(NH 4 ) 3 PO 4 +H 2 O(3),

[0034] 3(NH 4 ) 3PO 4 +NH 3 ·H 2 O→(NH 4 ) 10 (PO 4 ) 3 OH(4),

[0035] 2(NH 4 ) 10 (PO 4 ) 3 OH+10Ca(NO 3 ) 2 → Ca 10 (PO 4 ) 6 (OH 2 +20NH 4 NO 3 (5).

[0036] The overall equation is:

[0037] 10Ca(NO 3 ) 2 4H 2 O+6(NH 4 ) 2 HPO 4 +8NH 3 ·H 2 O→Ca 10 (PO 4 ) 6 (OH) 2 +20NH 4 NO 3 +6H 2 O(6).

[0038] Prepare a certain concentration of (NH 4 ) 2 HPO 4 solution and Ca(NO 3 ) 2 solution. where Ca(NO 3 ) 2 4H 2 O prepared with absolute ethanol, (NH 4 ) 2 HPO 4 Prepare with deionized water. According to formula (6), the two...

specific Embodiment approach 3

[0046] Embodiment 3: This embodiment is different from Embodiment 1 and Embodiment 2 in that, according to the different ratios of materials, the composition ratio of nano-biological ceramics is shown in Table 3.

[0047] Table 3 The composition ratio (%) of nano bioceramics forming artificial joint

[0048] Al 2 o 3

[0049] Note: Al 2 o 3 : ZrO 2 is the mole fraction ratio; ZrO 2 : HAP is the mass fraction ratio.

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Abstract

The process of forming artificial joint of nanometer bioceramic relates to nanometer ceramic material forming technology, and aims at solving the problem of forming complicated shape ceramic product. The process includes the following steps: 1. hot pressing and sintering composite Al2O3 / ZrO2 powder or ZrO2 / HAP powder to prepare nanometer ceramic block; and 2. closed die forging to form ceramic product at high temperature. By means of the twice forming process, the present invention can form ceramic part of complicated shape. The present invention has the advantages of simple forming process, easy manufacture of mold, low cost, etc.

Description

technical field [0001] The invention relates to a process method for forming an artificial joint by nano-biological ceramics. Background technique [0002] Bioceramic materials require high bioelasticity, biocompatibility and stable chemical properties. Utilizing these properties, various tissues and organs can be made for repairing or replacing the human body. However, the processing of ceramics is extremely difficult, especially the processing of complex-shaped ceramics is extremely difficult. The difficulty of processing has hindered its practical application. [0003] The preparation of ceramic materials by hot pressing and sintering is usually feasible to obtain regular shaped ceramic blocks or components. However, for ceramic structural parts with complex shapes, due to the fluidity of the powder during sintering, it is difficult for the powder to reach the inside of the complex cavity and achieve density during sintering. This difficulty is solved by technical meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/645A61L27/10C04B35/119
Inventor 王竹菊韩文波
Owner HARBIN MEDICAL UNIVERSITY
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