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Glass ceramic for making dental prosthesis and preparation method thereof

A technology for glass ceramics and restorations, which is applied in the field of glass ceramics for making dental restorations and its preparation, can solve the problem that the balance and unity of mechanical properties and optical properties of dental aesthetics cannot be satisfied, the aesthetics and simulation properties of restorations are poor, and they are not suitable for prefabrication. Tooth aesthetic restoration and other issues, to improve the anti-crack growth ability, reduce the scattering effect, and achieve the effect of good matching

Inactive Publication Date: 2013-04-17
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, dental alumina ceramics and zirconia ceramics have the highest mechanical strength among dental all-ceramic materials, but the improvement of mechanical properties is at the expense of optical properties. The light transmittance of such materials is very small, even close to that of metals. The aesthetics and imitation of the restoration are poor, so it is not suitable for the aesthetic restoration of anterior teeth
[0005] It can be seen that the current commercial all-ceramic restoration materials cannot meet the balance and unity of mechanical and optical properties required by the principle of dental aesthetic restoration.

Method used

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  • Glass ceramic for making dental prosthesis and preparation method thereof
  • Glass ceramic for making dental prosthesis and preparation method thereof
  • Glass ceramic for making dental prosthesis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh according to mass ratio: 58% SiO 2 , 29% Li 2 CO 3 , 3.7% of K 2 CO 3 , 2.8% Al 2 o 3 , 2.4% ZrO 2 , 1.5% CeO 2 and 2.6% P 2 o 5 A total of 500g of ingredients are set aside.

[0027] The above ingredients were mixed and ball milled for 8 hours, mixed evenly, put into an oven, and dried at 80°C for 24 hours to obtain a mixed powder.

[0028] Preheat the quartz crucible in a resistance furnace, pour the mixed powder into the preheated quartz crucible, raise the temperature to 1480°C at a rate of 10°C / min, melt at 1480°C in a program-controlled resistance furnace for 2 hours, and then melt the obtained The slurry was quickly poured into deionized water and quenched to obtain glass particles.

[0029] The obtained glass particles were milled in an agate ball mill jar for 12 hours, and dried to obtain glass powder; the glass powder was put into a prefabricated box, and subjected to cold isostatic pressing at a pressure of 250 MPa to form a green body. Carr...

Embodiment 2

[0033] Weigh according to mass ratio: 59% SiO 2 , 28.2% Li 2 CO 3 , 3.7% of K 2 CO 3 , 2.7% Al 2 o 3 , 2.3% ZrO 2 , 1.6% CeO 2 , 2.5% P 2 o 5 A total of 500g of ingredients are set aside.

[0034] The above ingredients were mixed and ball milled for 8 hours, mixed evenly, put into an oven, and dried at 80°C for 24 hours to obtain a mixed powder.

[0035] The quartz crucible is preheated in a resistance furnace, the mixed powder is poured into the preheated quartz crucible, the temperature is raised to 1500 °C at a rate of 10 °C / min, and 1500 °C is melted in a program-controlled resistance furnace for 1.5 hours, and then the obtained The molten slurry is quickly poured into deionized water and quenched to obtain glass particles.

[0036]The obtained glass particles were milled in an agate ball mill jar for 12 hours, and dried to obtain glass powder; the glass powder was put into a prefabricated box, and subjected to cold isostatic pressing at a pressure of 250 MPa to...

Embodiment 3

[0040] Weigh according to mass ratio: 58% SiO 2 , 29% Li 2 CO 3 , 3.8% of K 2 CO 3 , 2.7% AL 2 o 3 , 2.4% ZrO 2 , 1.5% CeO 2 , 2.6% P 2 o 5 A total of 500g of ingredients are set aside.

[0041] The above ingredients were mixed and ball milled for 8 hours, mixed evenly, put into an oven, and dried at 80°C for 24 hours to obtain a mixed powder.

[0042] Preheat the quartz crucible in a resistance furnace, pour the mixed powder into the preheated quartz crucible, raise the temperature to 1450°C at a rate of 10°C / min, melt at 1450°C in a program-controlled resistance furnace for 2 hours, and then melt the obtained The slurry was quickly poured into deionized water and quenched to obtain glass particles.

[0043] The obtained glass particles were milled in an agate ball mill jar for 12 hours, and dried to obtain glass powder; the glass powder was put into a prefabricated box, and subjected to cold isostatic pressing at a pressure of 250 MPa to form a green body. Carry ...

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Abstract

The invention discloses a glass ceramic for making a dental prosthesis and a preparation method thereof. The glass ceramic comprises the following components in percentage by weight: 56 to 59 percent of SiO2, 28 to 30 percent of Li2CO3, 3.7 to 4.0 percent of K2CO3, 2.7 to 3.0 percent of Al2O3, 2.3 to 2.4 percent of ZrO2, 1.5 to 1.6 percent of CeO2 and 2.5 to 3.0 percent of P2O5. The preparation method of the glass ceramic comprises the following steps of: uniformly mixing and ball-milling the components, and drying after uniformly mixing so as to obtain mixed powder; pouring the mixed powder into a quartz crucible to carry out founding, then pouring molten powder into deionized water and carrying out cold quenching to obtain glass particles; placing the glass particles into an agate jar and carrying out ball milling and drying to obtain glass powder; filling the glass powder into a prefabricated box to carry out cold isostatic pressure forming so as to obtain a glass powder blank; and finally, carrying out two-section crystallization thermal treatment on the glass powder blank to obtain the glass ceramic.

Description

technical field [0001] The invention relates to a dental restoration of glass ceramics, in particular to a glass ceramic used for making a dental restoration and a preparation method thereof. Background technique [0002] With the continuous improvement of living standards, people have higher and higher requirements for the visual effect of dental restorations. The semi-permeability of the material has an extremely important influence on the visual effect of the restoration. The semipermeability of dental all-ceramic materials is considered to be the main factor controlling the aesthetic effect of restorations, and it is one of the key references for the selection of restoration materials. This puts forward new requirements for the performance of all-ceramic restoration materials, that is, the restoration materials must have high mechanical strength to withstand the occlusal force without fragmentation; on the other hand, they must have excellent optical properties and be a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04
Inventor 王富袁坤高婧陈吉华
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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