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Formula of high-transmittance zirconia ceramic, preparation method of paste and manufacturing method of dental crown

A technology of zirconia ceramics and a production method, which is applied in the field of denture processing, can solve problems such as poor surface accuracy, prone to subsidence, and reduced overall mechanical properties, and achieve the effects of reducing process costs, controlling manufacturing costs, and easy photocuring molding

Pending Publication Date: 2021-09-03
江苏京科智镕新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in this technology: 1. The desired shape is obtained by cutting from prefabricated ceramic blocks. The raw material utilization rate of this technology itself is low and the cost is high; 2. The cutting dust is difficult to reuse, which is easy to cause environmental pollution and serious Affect the health of the processing personnel; 3. Affected by the bur, the detailed processing ability is insufficient and the surface accuracy is poor; 4. The bur is seriously worn out, which increases the cost in disguise; 5. When cutting a restoration with a complex shape, it may be caused by the limitation of the bur angle The preset shape of the crown cannot be obtained; 6. During the cutting process, micro-cracks may be caused, resulting in a decrease in the overall mechanical properties
However, when using light-cured resin-based ceramic slurry for molding, the solid content of the ceramic powder is low and prone to sedimentation, which affects the quality and strength of the molded crown, and the ceramic slurry is not easy to shape. More support is often required

Method used

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  • Formula of high-transmittance zirconia ceramic, preparation method of paste and manufacturing method of dental crown
  • Formula of high-transmittance zirconia ceramic, preparation method of paste and manufacturing method of dental crown
  • Formula of high-transmittance zirconia ceramic, preparation method of paste and manufacturing method of dental crown

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Experimental program
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Effect test

Embodiment 1

[0034] The embodiment of the present invention provides a composition formula of a high-transparency zirconia ceramic dental crown material for 3D printing, comprising the following raw materials in parts by weight:

[0035] 81-90 parts of yttria-stabilized zirconia ceramic powder, the yttria content in the yttria-stabilized zirconia ceramic powder is 4mol%-6mol%; the particle size of the yttria-stabilized zirconia ceramic powder is 0.1-1 micron 10-17 parts of photosensitive resin premix; 0.01-0.2 parts of defoamer; 0.01-10 parts of dispersant; 0.01-10 parts of leveling agent; 0.02-4 parts of photoinitiator; 1 -10 parts of rheology modifier.

[0036] Wherein, the photosensitive resin premix is ​​a kind of acrylic resin monomer or a mixture of multiple acrylic resin monomers; for example, 1,6-hexanediol diacrylate, dipentaerythritol hexaacrylate, acryloyl mol Aromatic urethane acrylate, tripropylene glycol diacrylate, ethoxylated pentaerythritol tetraacrylate, cyclotrimethylol...

Embodiment 2

[0040] The technical solution of the present invention also provides the method that the high-transparency zirconia ceramic crown formulation material used for 3D printing involved in embodiment 1 is prepared into a paste, and the preparation method comprises:

[0041] Sa: prepare photosensitive resin premix;

[0042]Sb: First add the dispersant to the photosensitive resin premixed solution in step Sa, mix evenly, and then gradually add the zirconia ceramic powder, the specific addition amount is 50% of the total amount of the zirconia ceramic powder added for the first time , mix evenly; add 20% of the total amount of zirconia ceramic powder for the second time, mix evenly; add 15% of the total amount of zirconia ceramic powder for the third time, mix evenly, and after adding each time, turn / min in a high-speed homogenizer for ball milling for 100 seconds; after mixing evenly, add a defoamer and cooperate with a vacuum defoamer for defoaming treatment, and finally add the re...

Embodiment 3

[0046] The technical solution of the present invention also provides a kind of manufacturing method based on SLA or DLP technology high permeability zirconia crown, it comprises the following steps:

[0047] S1: Intraoral scanning to obtain three-dimensional data of the crown, including personalized design of the crown shape based on the three-dimensional data of the dentition, and preservation of the three-dimensional data of the crown;

[0048] S2: Import the three-dimensional data of the dental crown into the typesetting software of the SLA or DLP 3D printer, set the corresponding printing parameters to establish the printing method, and set the support structure, and use the SLA or DLP method to form the zirconia ceramic paste prepared according to the above method into Plain embryo; specifically, as shown in Figure 1, the YSZ ceramic paste prepared above was prepared according to the three-dimensional data of the upper part of the structure (including single crown, bridge ...

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Abstract

The invention provides a high-permeability zirconia ceramic dental crown material and a preparation method thereof and a manufacturing method of a high-permeability zirconia dental crown. The high-permeability zirconia ceramic dental crown material is prepared from the following raw materials in parts by weight: 81-90 parts of yttria-stabilized zirconia ceramic powder, wherein the content of yttrium oxide in the yttria-stabilized zirconia ceramic powder is 4 mol%-6 mol%; 10-19 parts of a photosensitive resin premixed liquid; 0.01-0.2 part of a defoaming agent; 0.01-10 parts of a dispersant; 0.01-10 parts of a leveling agent; 0.02-4 parts of a photoinitiator; and 1-10 parts of a rheological additive. The method has the advantages of high raw material utilization rate, low process cost and high surface precision, and the prepared molded dental crown is good in quality, high in strength and good in aesthetic effect.

Description

technical field [0001] The invention relates to the field of denture processing, in particular to a high-transparency zirconia ceramic formula, a method for preparing a paste from the ceramic formula, and a method for preparing a high-transparency zirconia crown by using the paste. Background technique [0002] Zirconia is a commonly used all-ceramic restoration material because of its good mechanical properties, chemical properties, aesthetic properties and biocompatibility. To solve the problem of poor permeability of traditional zirconia, high-permeability zirconia materials with better permeability have been developed, which can be used for aesthetic restoration of anterior teeth. [0003] At present, the processing method of high-transparency zirconia crowns is mainly CAD / CAM cutting. However, there are many problems in this technology: 1. The desired shape is obtained by cutting from prefabricated ceramic blocks. The raw material utilization rate of this technology it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/638C04B35/645A61K6/15A61K6/878B33Y10/00B33Y70/10
CPCC04B35/48C04B35/622C04B35/638C04B35/645A61K6/878A61K6/15B33Y10/00B33Y70/10C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/6026C04B2235/96C04B2235/9653C04B2235/9661C04B2235/3225
Inventor 不公告发明人
Owner 江苏京科智镕新材料科技有限公司
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