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Dental ceramic material and preparation method and application thereof

A technology for dental ceramics and ceramic slurry, which is used in medical science, additive processing, prosthesis, etc., and can solve problems such as poor compactness and dimensional shrinkage.

Inactive Publication Date: 2019-07-23
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the binders used in the preparation of ceramic slurries are mainly artificial polymer gels or natural macromolecule gels. The biggest disadvantages of this type of ceramic material system are severe dimensional shrinkage and poor compactness.

Method used

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  • Dental ceramic material and preparation method and application thereof
  • Dental ceramic material and preparation method and application thereof
  • Dental ceramic material and preparation method and application thereof

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preparation example Construction

[0025] The invention provides a kind of preparation method of dental ceramic material, comprises the following steps:

[0026] mixing zirconia ceramic powder with inorganic phosphate solution to obtain ceramic slurry;

[0027] 3D printing or injection molding the ceramic slurry to obtain a ceramic green body;

[0028] The ceramic body is sequentially dehydrated and sintered to obtain a dental ceramic material.

[0029] The invention mixes zirconia ceramic powder with inorganic phosphate solution to obtain ceramic slurry. In the present invention, the inorganic phosphate solution preferably includes aluminum dihydrogen phosphate, aluminum hydrogen phosphate and aluminum phosphate normal salt. In the present invention, the inorganic phosphate solution is preferably prepared through the following steps: after mixing aluminum hydroxide and phosphoric acid in a molar ratio of 1:3 to 3.5, liquid phase synthesis is carried out, and the temperature of the liquid phase synthesis is 9...

Embodiment 1

[0046] Feed phosphoric acid and aluminum hydroxide at a molar ratio of 3:1, stir at 95°C for 2.5 hours to obtain a transparent and uniform phosphorus-containing binder, and continue mechanical stirring during the reaction to finally obtain an aluminum phosphate inorganic binder sol. After the aluminum phosphate sol is cooled to room temperature, the yttria-stabilized zirconia nano-powder is added into the phosphorus-containing binder in five batches, wherein the average grain size of the yttrium-stabilized zirconia nano-powder is 50nm, and the yttrium-stabilized zirconia nano-powder The mass ratio of the zirconium nanopowder to the phosphorus-containing binder is 1:1, and the ceramic slurry is prepared by ball milling. The rotational speed of the ball mill is 2500rmp, the time is 5min, and the number of repetitions is 3 times.

[0047] The ceramic slurry is injected into the barrel of the 3D printer, the printing parameters are adjusted, and the designed ceramic body is printed...

Embodiment 2

[0051] Feed phosphoric acid and aluminum hydroxide at a molar ratio of 3.5:1, stir at 90°C for 2 hours to obtain a transparent and uniform phosphorus-containing binder, and continue mechanical stirring during the reaction to finally obtain an aluminum phosphate inorganic binder sol. After the aluminum phosphate sol is cooled to room temperature, the yttria-stabilized zirconia nano-powder is added into the phosphorus-containing binder in six batches, wherein the average grain size of the yttrium-stabilized zirconia nano-powder is 80nm, and the yttrium-stabilized zirconia nano-powder The mass ratio of the zirconium nanopowder to the phosphorus-containing binder is 1:2, and the ceramic slurry is prepared by ball milling. The rotational speed of the ball mill is 2000rmp, the time is 2min, and the number of repetitions is 5 times.

[0052] A mold of human teeth is prepared by photo-curing printing, and then ceramic slurry is injected into the mold by injection molding to prepare cor...

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Abstract

The invention provides a dental ceramic material and a preparation method and an application thereof, and belongs to the field of dental ceramic materials. The preparation method includes the following steps: mixing zirconia ceramic powder and an inorganic phosphate solution to obtain ceramic slurry; carrying out 3D printing or injection molding on the ceramic slurry to obtain ceramic body; and dehydrating and sintering the ceramic body in order to obtain the dental ceramic material. The dental ceramic material of the invention adopts the inorganic phosphate as a binder, does not undergo thermal decomposition under the condition of ensuring good bonding performance, changes from an amorphous phase to a crystalline phase when reaching phase transition temperature, which means the inorganicphosphate is converted into a corresponding crystalline phase during the sintering process, so as to further increase the solid content and compactness of bioceramic. In addition, in the invention, the zirconia ceramic powder has good biocompatibility and has lower size shrinkage compared with ceramic prepared by conventional organic binder ceramic slurry.

Description

technical field [0001] The invention relates to the technical field of dental ceramic materials, in particular to a dental ceramic material and its preparation method and application. Background technique [0002] In oral hard tissue repair, compared with traditional metal materials and polymer materials, ceramic materials have the characteristics of high hardness, not easy to deform, wear resistance, stable physical and chemical properties, excellent aesthetic effects and good biocompatibility, but ceramics Fragility limits its application in oral clinical medicine. Among the commonly used ceramic systems, zirconia ceramics (referred to as ZrO 2 Bioinert material as the main component) improves the brittleness of ceramics to a certain extent, and has excellent mechanical properties, these excellent properties can make up for the deficiencies of traditional dental materials in clinical applications, and zirconia ceramics have good biocompatibility Therefore, zirconia ceram...

Claims

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Application Information

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IPC IPC(8): C04B35/447C04B35/48C04B35/622A61L27/10A61L27/12A61L27/56B33Y70/00B33Y10/00
CPCA61L27/10A61L27/12A61L27/56A61L2430/00B33Y10/00B33Y70/00C04B35/447C04B35/48C04B35/622C04B2235/3246C04B2235/447C04B2235/6026
Inventor 王晓龙蒋盼张昀李婷婷张修银姬忠莹刘志鲁周峰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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