Preparation of multilayer semitransparent zirconia full-porcelain dental repair material

A restoration material and zirconia technology, which is applied in the field of multi-layer translucent zirconia all-ceramic dental restoration materials and their preparation, and achieves the effects of good process repeatability, high molding density and stable product quality

Inactive Publication Date: 2013-05-29
ZXTGY BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dental bodies and dentures made of this zirconia restorative material overcome the defects of the prior art, solve the color problem of zirconia powder, and at the same time improve its translucency, making the tooth color more beautiful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of MgO partially stabilized zirconia powder by hydrothermal method

[0022] Configure a mixed solution of 0.95mol / l ZrOCl2 and 0.05mol / l Mg(NO3)2, add ammonia water as a precipitant under stirring conditions, and control the pH value to 8~9. The precipitate was then filtered and washed until the washes were free of Cl - (It can be detected with 0.1mol / l silver nitrate solution). Mix the obtained precipitate with an appropriate amount of deionized water (about (2~3) times the weight of the precipitate) and place it in a hydrothermal reaction kettle, heat up in a closed manner, the heating rate is 4°C / min, the reaction temperature is 180°C, and the pressure is 1MPa , reaction time 2h, get MgO-ZrO 2 Powder suspension, filtered and dried at 120°C for 24 hours to obtain ZrO partially stabilized by MgO 2 Powder. It can be observed through a transmission electron microscope that the particle size of the powder is about 18nm.

Embodiment 2

[0023] Example 2 Preparation of translucent dental zirconia restoration material

[0024] Partially stabilized tetragonal zirconia powder, 4gZnO and colorant 0.5g CeO, 0.5g Er obtained by the method of embodiment 1 with 123g 2 o 3 , mixed with 0.2g MnO, then added 3wt%PVA, carried out rapid ball milling for 2h, and sprayed and granulated at 180°C to prepare a dental zirconia restoration material with a particle diameter of about 50μm.

Embodiment 3

[0025] Example 3 Preparation of Translucent Dental Zirconia Restoration Material

[0026] Partially stabilized tetragonal zirconia powder, 4g ZnO and colorant 0.05g CeO, 0.05g Er obtained by the method of embodiment 1 with 123g 2 o 3 , mixed with 0.02g MnO, then added 4wt% PVA, carried out rapid ball milling for 2.5h, and sprayed and granulated at 200°C to obtain a dental zirconia restoration material with a particle diameter of about 48μm.

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Abstract

The invention belongs to the field of porcelain materials and preparation thereof, and in particular relates to a multilayer semitransparent zirconia full-porcelain dental repair material and a preparation method thereof. The material comprises the chemical ingredients such as magnesium oxide and part stable square-phase zirconia, wherein the molecular contents of the magnesium oxide and the zirconia are respectively 2-10% and 90-98%; the part stable square-phase zirconia is added with a modifying agent to be modified, wherein the molar ratio of the modifying agent and the part stable square-phase zirconia is 1: (0.01-0.1); and a coloring agent is added into the modified zirconia repair material, and the coloring agent and the modified zirconia repair material respectively account for 0.1-1% and 99-99.9%. The method comprises the following steps of power preparing, mixing and granulating, two-step forming, plastic discharging and sintering. Compared with the prior art, the material has the advantages of good producing technology repeatability, stable quality, reliable performance and convenience in production.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials and its preparation, and in particular relates to a multi-color translucent zirconia all-ceramic dental restorative material and a preparation method thereof. Background technique [0002] Zirconia all-ceramic materials have high mechanical properties (flexural strength up to 1100MPa, fracture toughness 5MP m 1 / 2 The above) and good biocompatibility have been widely used in the preparation of crown and bridge materials for oral restoration in recent years. The currently used zirconia material is tetragonal zirconia partially stabilized by yttrium oxide or cesium oxide. Its sintered body is opaque white, which is not beautiful in the oral environment, so it is usually necessary to add a layer of opaque porcelain on its surface. to hide its chalky color, but the effect is not ideal. Another method is to soak the zirconia body in the coloring solution for coloring and then sintering, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 胡永刚
Owner ZXTGY BEIJING TECH
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