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Preparation of powder of beta-TCP bioceramic possessing crystal grain structure of laminar clearage

A bio-ceramic and powder technology is applied in the field of preparation of β-TCP bio-ceramic powder with flaky cleavage grain structure to achieve the effect of being beneficial to degradation

Inactive Publication Date: 2003-07-23
WUHAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

However, the β-TCP powder prepared by the traditional process does not have this structure

Method used

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  • Preparation of powder of beta-TCP bioceramic possessing crystal grain structure of laminar clearage
  • Preparation of powder of beta-TCP bioceramic possessing crystal grain structure of laminar clearage
  • Preparation of powder of beta-TCP bioceramic possessing crystal grain structure of laminar clearage

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Experimental program
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Embodiment Construction

[0019] First, weigh the CaHPO 4 2H 2 O111.05g and CaCO 3 32.29g, after mixing, stir evenly with a mortar, put the raw materials into the electric furnace, raise the temperature to 930°C at a rate of about 6°C / min, and keep it warm for 3 hours. The following chemical reactions occurred:

[0020] (1)

[0021] Then, take the powder out of the furnace, and quickly cool it with liquid nitrogen. After the temperature drops to the same temperature as the liquid nitrogen, put it into an electric furnace at 930°C for rapid heating, keep it for a certain period of time, and then cool it naturally with the furnace. Since the β-TCP material crystal belongs to the trigonal crystal system, its lattice parameters a0, c, and z are not equivalent. Under the extreme conditions of rapid cooling and rapid heating, the thermal shock caused by thermal expansion and contraction may be more severe in a certain direction , so that the bonding force between the crystal planes is des...

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Abstract

A process for preparing bioceramics beta-TCP with flaky cleavage grain structure includes proportionally mixing bihydrated calcium hydrogen phosphate with calcium carbonate, heating to 930 deg.C, holding the temp for 3 hr, suddenly cooling in liquid nitrogen, suddenly heating to 930 deg.C, natural cooling, immersing in original Ringer solution at 37 deg.C for 7 days, and drying. The said bioceramics can be easily degradated in human body.

Description

1. Technical field: [0001] The invention is a preparation process of β-TCP bioceramic powder. 2. Background technology: [0002] β-TCP is a promising biodegradable material for bone defect repair. With the prolongation of β-TCP implantation time in the human body, under the complex physiological conditions in the body, the material gradually degrades and changes in shape and structure, participates in the formation of new bone and eventually disappears. The research of the Biological Center of Wuhan University of Technology shows that after the β-TCP material is implanted in the body for a certain period of time, the single-grain structure shows obvious flaky cleavage and directional alignment changes. According to the principle of the lowest energy, if the material grain itself has this structure before being implanted into the human body, it will be more conducive to the degradation of the material in the body and participate in the repair of bone tissue. Therefore, afte...

Claims

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Application Information

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IPC IPC(8): A61L27/12C04B35/447C04B35/64
Inventor 王欣宇李世普戴红莲沈春华阎玉华陈晓明江昕
Owner WUHAN UNIV OF TECH
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