A kind of preparation method of bioactive zirconia dental ceramic material

A technology of dental ceramics and bioactivity, applied in dental preparations, dentistry, dental prostheses, etc., can solve the problems of lack of bioactivity, interfacial corrosion, implant failure, etc. Effect

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Although zirconia ceramics have good mechanical properties and unique aesthetic effects, due to their lack of biological activity, the application of zirconia ceramics as dental restoration materials will be affected to a certain extent
Moreover, after being implanted in the body as an inert material, the surrounding fibrous tissue will hinder the integration of the implant and the surrounding bone tissue, resulting in implant failure. Therefore, it is of great significance to develop bioactive zirconia dental restoration materials.
[0003] It has been reported that the preparation methods of bioactive zirconia ceramic materials mainly include: Al 2 o 3 Cyclone particle blasting, laser radiation, chemical corrosion, ion implantation, dopamine modification, composite bioactive materials, such as hydroxyapatite, bioactive glass, etc., but surface treatment methods such as sandblasting, micro-arc oxidation, ion implantation, etc. It may induce the transformation of the tetragonal phase to the monoclinic phase on the surface of the zirconia matrix, resulting in microcracks, thereby affecting the mechanical properties and reliability of the material; similarly, when the second-phase bioactive material with low strength is composited in the zirconia matrix, it will also Reduce the mechanical properties of zirconia ceramics; in addition, bioactive surface coatings prepared by plasma spraying, sol-gel method, chemical deposition method, biomineralization method, etc. on the surface of zirconia ceramics, such as phosphate coating, bioglass Coating, hydroxyapatite coating, due to the mismatch of thermal expansion coefficient and elastic modulus between the zirconia matrix and the coating, the interface is often poorly bonded, and microcracks are prone to occur on the surface; secondly, in the complex environment of the oral cavity , interfacial corrosion is prone to occur, and the coating is easy to dissolve and peel off, which affects the medium and long-term effect of the implant after implantation

Method used

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  • A kind of preparation method of bioactive zirconia dental ceramic material
  • A kind of preparation method of bioactive zirconia dental ceramic material
  • A kind of preparation method of bioactive zirconia dental ceramic material

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The application composition of this embodiment is SiO 2 ,40mol%; CaO,56mol%; P 2 o 5 , 4mol% bioactive glass to improve the bioactivity of yttrium partially stabilized tetragonal zirconia ceramics (Y-TZP), the specific process includes:

[0046] (1) According to the composition ratio, tetraethyl orthosilicate (TEOS, Si(OC 2 h 5 ) 4 )), dissolved in deionized water (orthosilicate: deionized water molar ratio is 1:10), adding 0.1mol / L of HNO 3 Adjust the pH to 1.67, stir with a mixer at a speed of 250r / min, and the stirring time is 60min;

[0047] (2) After observing that the solution in step (1) becomes clear, triethyl phosphate (TEP, OP(OC) 2 H5) 3 ), stirring at a speed of 250r / min, the stirring time is 60min;

[0048] (3) After the solution of observation step (2) becomes clear, the calcium nitrate (Ca(NO) added in according to the composition ratio 3 ) 2 4H 2 (0), stirring at a speed of 250r / min, the stirring time is 60min;

[0049] (4) Obtain the bioacti...

Embodiment 2

[0063] The application composition of this embodiment is SiO 2 ,90mol%; CaO,18mol%; P 2 o 5 , 1mol% bioactive glass infiltration modification to improve the bioactivity of magnesium partially stabilized zirconia ceramics (Mg-TZP), the specific process includes:

[0064] (1) According to the composition ratio, the tetraethyl orthosilicate (TEOS, Si(OC 2 h 5 ) 4 )), dissolved in an appropriate amount of deionized water (tetraethyl orthosilicate: deionized water molar ratio is 1:10), adding 0.1mol / L of HNO 3 Adjust the pH to 1.35, stir at a speed of 450r / min, and stir for 50min;

[0065] (2) After observing that the solution in step (1) becomes clear, triethyl phosphate (TEP, OP(OC) 2 H5) 3 ), stirred at a speed of 450r / min, and the stirring time was 50min;

[0066] (3) After the solution of observation step (2) becomes clear, the calcium nitrate (Ca(NO 3 ) 2 4H 2 (0), stirring at a speed of 450r / min, the stirring time is 50min;

[0067] (4) Obtain the bioactive glass...

Embodiment 3

[0075] The application composition of this embodiment is SiO 2 ,80mol%; CaO,16mol%; P 2 o 5 , 4mol% bioactive glass infiltration modification to improve the bioactivity of selenium partially stabilized zirconia ceramics (Ce-TZP), the specific process includes:

[0076] (1) According to the composition ratio, tetraethyl orthosilicate (TEOS, Si(OC 2 h 5 ) 4 )), dissolved in deionized water (orthosilicate: deionized water molar ratio is 1:10), adding 0.1mol / L of HNO 3 Adjust the pH to 2.50, stir at a speed of 650r / min, and stir for 40min;

[0077] (2) After observing that the solution in step (1) becomes clear, triethyl phosphate (TEP, OP(OC) 2 H5) 3 ), stirred at a speed of 650r / min, and the stirring time was 40min;

[0078] (3) After the solution of observation step (2) becomes clear, the calcium nitrate (Ca(NO 3 ) 2 4H 2 (0), stirring at a speed of 650r / min, the stirring time is 40min;

[0079] (4) Obtain the bioactive glass precursor sol after the solution in the ...

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Abstract

The invention discloses a preparation method of a dental bioactive zirconia ceramic material. The preparation method comprises steps as follows: with adoption of a method for preparing bioactive glass from sol-gel, a hydrolysable silicone-containing compound, triethyl phosphate, calcium nitrate, other nitrates and the like are added to deionized water, pH is regulated, a mixed solution is subjected to hydrolytic condensation, and bioactive glass sol is obtained; after being soaked in the prepared bioactive glass sol in a vacuum negative-pressure environment for a period of time, a zirconia pre-sintered body is taken out, dried and sintered at the high temperature, and the dental bioactive zirconia ceramic material is obtained. The bioactive zirconia ceramic material has good biological activity and excellent mechanical properties and has great social and economic value in improvement of the dental material repairing effect and promotion of wider clinical application of the material.

Description

technical field [0001] The invention relates to the field of dental restoration medical materials, in particular to a preparation method of a bioactive zirconia dental ceramic material. Background technique [0002] since In the 1960s, it was first proposed that oral implants use high-purity titanium metal instead of gold and other precious metals as new implant materials. Titanium and titanium alloy implants have been used in clinical treatment of tooth loss caused by dental caries, periodontitis and dental trauma. has been widely applied. However, due to the blackening of titanium metal caused by gingival recession and the allergy caused by the release of toxic ions, the wide application of titanium implants has been limited to a certain extent. Zirconia ceramics are different from titanium metal implants due to their good biocompatibility and stability, excellent mechanical properties and unique aesthetic effects, so zirconia ceramics are a dental implant with good cli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622C04B41/86C04B35/64A61K6/818
CPCA61K6/818C04B35/48C04B35/622C04B35/64C04B41/5022C04B41/86C04B2235/77C04B2235/96C04B41/4537
Inventor 叶建东柯金环
Owner SOUTH CHINA UNIV OF TECH
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