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Preparation method for functionally gradient materials (FGM) of ZrO2-based nano-hydroxyapatite (n-HA)

A technology of nano-hydroxyapatite and gradient functional materials, applied in coatings, medical science, prostheses, etc., can solve problems such as large differences in thermal expansion coefficients, poor mechanical properties, and impossibility of implants, and achieve a balance of thermal expansion coefficients Differences, strong practical and theoretical implications, effects of addressing shedding and premature absorption

Inactive Publication Date: 2017-11-03
王青山
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Problems solved by technology

However, the disadvantage is that hydroxyapatite (hydroxyapatite, HA) bioceramics has poor mechanical properties, cannot withstand large tissue loads, and cannot be used as an implant alone, so many scholars attach it to pure titanium as a coating. or zirconia (ZrO 2 ) ceramic implant surface, thereby improving the biological performance of the implant
However, due to the large difference in thermal expansion coefficient between HA and pure titanium or zirconia, especially during sintering and adhesion, a large thermal stress is generated at the interface, and the combination of the two is not firm, resulting in HA falling off or cracking, resulting in planting failure.

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  • Preparation method for functionally gradient materials (FGM) of ZrO2-based nano-hydroxyapatite (n-HA)
  • Preparation method for functionally gradient materials (FGM) of ZrO2-based nano-hydroxyapatite (n-HA)

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Embodiment Construction

[0031] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] like figure 1 , figure 2 Shown, a kind of preparation method of zirconia-based nano-hydroxyapatite gradient functional material comprises the following steps:

[0033] (1) Gradient functional material powder preparation

[0034] 1) Yttrium oxide stabilized nano-Zr0 2 Powder preparation: adding 1% by volume polyvinyl alcohol (PVA) to 3 mol% nano-yttria-stabilized nano-zirconia powder (3YSZ-n). Zr0 2 It is a tetragonal crystal with a particle size of 30-50nm and a purity of 99%; the particle size of nano-yttrium oxide is 40nm and a purity of 99.5%.

[0035] 2) Preparation of porous n-HA powder: add 1% by volume of PVA to the n-HA powder, then add 10% by volume of nano-carbon powder, and mix evenly by ball milling and ultrasonic oscillation. The particle size of n-HA is 20-40nm, the purity is 99%; ...

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Abstract

The invention discloses a preparation method for FGM of ZrO2-based n-HA. The method comprises the following steps: preparing FGM powder; preparing a green body specimen; sintering the specimen. The materials disclosed by the invention fully utilize the advantages of good biocompatibility and biological activity of n-HA and high mechanical strength of biological inert materials, namely ZrO2, and further have strong practicability and theoretical significance.

Description

technical field [0001] The invention relates to the technical field of bioactive materials, in particular to a preparation method of a zirconia-based nano-hydroxyapatite gradient functional material. Background technique [0002] Bioactive materials are more and more widely used in bone tissue defect and implant repair, but there are more and more problems, especially the interface between the implant and the surrounding soft and hard tissues is directly related to the stability of the implant Sex is the key to successful treatment. A large number of studies have shown that nano-hydroxyapatite (nano-hydroxyapatite, n-HA) has good biocompatibility and bioactivity. After it is sintered into bioceramics, it can still induce the proliferation and differentiation of osteoblasts, and promote bone formation. Formed, showing excellent osseointegration, osteoinduction and osteoconductivity, it is an ideal hard tissue replacement material. However, the disadvantage is that hydroxyap...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/447C04B35/622A61L27/02A61L27/32A61L27/56
CPCA61L27/025A61L27/32A61L27/56A61L2420/02A61L2430/02C04B35/447C04B35/48C04B35/622C04B2235/3225C04B2235/75
Inventor 王青山王晶高艳舒静媛高玉光
Owner 王青山
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