Preparation method of biomedical porous titanium

A biomedical, porous titanium technology, applied in the field of biomedical porous titanium preparation, can solve the problem of affecting the biological and mechanical compatibility of biomedical porous titanium, affecting the bonding strength and osteogenic activity of implants and osseointegration, and the difficulty of porous titanium. Controlling pore size and porosity to achieve controllable pore parameters, eliminate stress-shielding, and avoid loosening or fracture

Inactive Publication Date: 2014-11-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology describes making ceramics that have improved properties compared to existing ones without harmful substances being introduced therein. It involves creating tiny holes inside them through evaporation techniques instead of adding chemical agents like B2O3. These small holes help cells grow on their surface better than traditional methods while also preventing unwanted particles from entering it. Additionally, this technique allows for precise control over how much pressure should be applied when forming these microscopically smooth structures. Overall, this technical results improve the quality and durability of prosthetic teeth made up entirely of ceramic components.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding ways for making better quality porcelain Titanide cerams suitable for medical applications without compromising their physical/mechanical performance due to changes made overtime when exposed to various environments like water vapor or oxygen compared to other types of commonly available prosthetic devices called hip replacements. Porous tantalum oxynitride ceramics were developed but they lack long term stability under physiologically relevant conditions. To address these issues, researchers proposed adding calcium carbonate particles instead of crystalloid beta titanite to improve the cohesiveness and durability of porcathode screw type structures.

Method used

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  • Preparation method of biomedical porous titanium

Examples

Experimental program
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Embodiment 1

[0021] This embodiment provides a method for preparing biomedical porous titanium by spark plasma sintering, which specifically includes the following steps:

[0022] (1) According to Ti 80%, NH 4 HCO 3 20% by mass percentage, respectively weigh Ti metal powder with a particle size of 45 μm and a purity of 99.5% and NH with a particle size of 300 μm and a purity of analytically pure 4 HCO 3 Porogen powder;

[0023] (2) Put the powder weighed in step (1) into the mixer and mix for 30 minutes to obtain the mixed powder;

[0024] (3) Put the mixed powder obtained in step (2) into a stainless steel mold, apply a unidirectional pressure of 100 MPa through the indenter, and retreat the mold after cold pressing to obtain a block compact;

[0025] (4) Put the block compact obtained in step (3) into a cylindrical graphite mold, place it in a spark plasma sintering furnace, vacuumize the system to 6Pa and then sinter, and heat it at a heating rate of 100°C / min to After the sinteri...

Embodiment 2

[0031] This embodiment provides a method for preparing biomedical porous titanium by spark plasma sintering, which specifically includes the following steps:

[0032] (1) According to Ti 85%, NH 4HCO 3 15% by mass, respectively weigh Ti metal powder with a particle size of 40 μm and a purity of 99.5% and NH with a particle size of 1000 μm and a purity of analytically pure 4 HCO 3 Porogen powder;

[0033] (2) Put the powder weighed in step (1) into the mixer and mix for 60 minutes to obtain the mixed powder;

[0034] (3) Put the mixed powder obtained in step (2) into a stainless steel mould, apply a unidirectional pressure of 300MPa through the indenter, and retreat the mold after cold pressing to obtain a block compact;

[0035] (4) Put the block compact obtained in step (3) into a cylindrical graphite mold, place it in a spark plasma sintering furnace, vacuumize the system to 2Pa and sinter it, and heat it at a heating rate of 90°C / min to After the sintering temperature...

Embodiment 3

[0040] This embodiment provides a method for preparing biomedical porous titanium by spark plasma sintering, which specifically includes the following steps:

[0041] (1) According to Ti 75%, NH 4 HCO 3 30% by mass, weigh Ti metal powder with a particle size of 25 μm and a purity of 99.5% and NH with a particle size of 500 μm and a purity of analytically pure 4 HCO 3 Porogen powder;

[0042] (2) Put the powder weighed in step (1) into the mixer and mix for 120 minutes to obtain the mixed powder;

[0043] (3) Put the mixed powder obtained in step (2) into a stainless steel mold, apply a unidirectional pressure of 200 MPa through the indenter, and retreat the mold after cold pressing to obtain a block compact;

[0044] (4) Put the block compact obtained in step (3) into a cylindrical graphite mold and place it in a spark plasma sintering furnace. The system is vacuumed to 3Pa and then sintered, and heated at a heating rate of 50°C / min to After the sintering temperature of ...

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Abstract

The invention discloses a preparation method of biomedical porous titanium, belonging to the technical field of preparation of biomedical materials. The preparation method comprises the following steps: proportioning Ti metal powder and NH4HCO3 pore-forming agent powder according to required porosity and then mixing the powder to obtain mixed powder, mechanically pressing the mixed powder into blocky pressed blanks, then putting the blocky pressed blanks into a spark plasma sintering furnace, vacuumizing a system to 2-6Pa and then sintering, continuously vacuumizing in the sintering process so that NH4HCO3 is cooled to the room temperature along with the furnace after being completely decomposed and volatilized and carrying out mold release, thus obtaining the biomedical porous titanium material, wherein the heating rate is 50-100 DEG C/min, the sintering temperature is 1000-1200 DEG C, and the sintering and insulating time is 5-10min. The biomedical porous titanium material prepared by utilizing the method has the advantages of pure components without pore-forming agent residues, controllable pore parameters (the porosity is 30-70% and the pore dimension is 300-1000mu m), low elasticity modulus (2-20GPa), proper strength (100-287MPa) and the like, and can be applied as a good artificial bone tissue repair or replacement material.

Description

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Claims

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Application Information

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Owner KUNMING UNIV OF SCI & TECH
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