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Light transmission gradually changed zirconium oxide material for dental surgery and preparation process thereof

A technology of permeating zirconia and preparation process, which is applied in the field of oral materials of zirconia ceramic blocks, can solve the problems that the light transmittance of zirconia materials cannot meet the requirements of light transmittance and the cost is low, and achieves a wide range of use and low cost. , the effect of stable quality

Inactive Publication Date: 2011-11-02
SHENZHEN UPCERA DENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides a dental high-transparency zirconia material with gradually changing light transmittance, which solves the problem that the light transmittance of the zirconia material in the prior art cannot meet the requirements of the anterior incisors of young patients on the material transparency. The problem of optical requirements, and the present invention has low cost and stable quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] From 5.36wt%Y 2 o 3 Stabilized tetragonal zirconia polycrystalline powder 3Y-TZP with 6.4wt%Y 2 o 3 The stable partially stabilized zirconia polycrystalline powder 4Y-PSZ is prepared from two raw materials with a mass ratio of 4:1.

[0016] First, weigh the 3Y-TZP powder and 4Y-PSZ powder according to the above mass percentage, pour the weighed 5Y-PSZ powder into the mold for 2MPa dry pressing, then pour the 3Y-TZP powder into the mold 5Y- 60MPa dry pressure on the PSZ powder, and then 100MPa isostatic pressing after demoulding, pre-sintering the ceramic blocks prepared by the method, and then processing the pre-sintered ceramic blocks according to needs, and finally putting them into the box-type high-temperature resistance furnace. Sinter at 1400~1600°C and keep warm for 2 hours to get the finished product. .

[0017] The technical indicators of the above-mentioned finished products are tested as follows:

[0018] ⑴Three-point bending strength

[0019] Equi...

Embodiment 2

[0024] It is prepared from the following two raw materials, 3Y-TZP and 5Y-PSZ, at a mass ratio of 4:1.

[0025] Its preparation process is with embodiment 1.

[0026] The test method is the same as in Example 1, and the test result: the three-point bending strength is 968MPa.

Embodiment 3

[0028] It is prepared from the following two raw materials, 3Y-TZP and 5.5Y-PSZ, at a mass ratio of 2:1.

[0029] Its preparation process is with embodiment 1.

[0030] The test method is the same as in Example 1, and the test result: the three-point bending strength is 912 MPa.

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Abstract

The invention relates to an oral material, in particular to a light transmission gradually changed zirconium oxide material for dental surgery and a preparation process thereof, the light transmission gradually changed zirconium oxide material is an oral material of a zirconium oxide porcelain block used for repairing porcelain tooth in dental surgery and is prepared from following two raw materials of 3Y-TZP and (4-6) Y-PSZ according to a mass ratio of 4: 1 to 2: 1. In the invention, the requirements of anterior teeth cutting end of a young patient on light transmission of the light transmission gradually changed zirconium oxide material can be satisfied. Moreover, after processing into dental corona, porcelain is not required to be applied, therefore, a porcelain fracture phenomenon caused by different expansion coefficients between zirconium oxide and decorative porcelain can be avoided. Meanwhile, the preparation method is simple, the cost is low and the quality is stable.

Description

technical field [0001] The invention relates to an oral cavity material, in particular to a dental translucent graded zirconia material and a preparation process thereof, and is an oral cavity material for dental restoration of zirconia porcelain blocks for all-ceramic teeth. Background technique [0002] Since yttrium-stabilized tetragonal zirconia ceramics have good biocompatibility and excellent mechanical properties, especially the fracture toughness is much higher than that of alumina ceramics, zirconia ceramics have been used as the base of dental fixed restorations since the 1990s. crown material. However, due to its single light transmittance, it is generally necessary to put porcelain on the processed inner crown to simulate the natural tooth when it is used for the aesthetic restoration of the anterior teeth of young patients. The difference in thermal expansion coefficient of decorative porcelain and the low bonding strength between decorative porcelain and zirco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/027
Inventor 王鸿娟司文捷严庆云何玲玲
Owner SHENZHEN UPCERA DENTAL TECH
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