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

A zirconia-permeable, dental technology, applied in the field of oral materials for zirconia porcelain blocks, can solve the problems of low cost and the light transmittance of zirconia materials can not meet the requirements of light transmittance, and achieve low cost, wide range of use, The effect of stable quality

Inactive Publication Date: 2013-03-06
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 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. It is prepared from the following two raw materials, 3Y-TZP and (4~6)Y-PSZ, at a mass ratio of 4:1~2:1. The present invention can meet the light transmittance requirements of the anterior incisors of young patients. Moreover, after being processed into a crown, there is no need to apply porcelain, thereby avoiding the phenomenon of porcelain collapse caused by the difference in expansion coefficient between zirconia and decorative porcelain. Simultaneously, the operation method of the invention is simple, low in cost and stable in quality.

Description

Technical field [0001] The present invention involves a oral material, especially for a dental use of light transmittoma and preparing process. It is a oral material for oxidation porcelain for dental foster porcelain. Background technique [0002] Because 钇 stable square phase oxide ceramics have good biocompatible and excellent mechanical properties, especially the fracture toughness is much higher than the alumina ceramics. From the 1990s, the oxidation 锆 锆 ceramics began to be used for dental fixed repair body bottom.Crown material.However, due to its single light transmission rate, the aesthetics of the front teeth of young patients generally need to be porcelain in the inner crown after processing to simulate natural teeth and increase the increase in base teeth.The difference between the thermal expansion coefficient of porcelain, the combination of porcelain and oxidation is low, which can easily lead to peeling porcelain; that is, collapsed porcelain.The clinical results...

Claims

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Application Information

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Patent Type & Authority Patents(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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