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Lithium silicate glass ceramic restoration and preparation method thereof

A glass ceramic and lithium silicate technology, which is applied in glass manufacturing equipment, glass pressing, glass production, etc., can solve problems such as low production efficiency, improve production efficiency, save crucible maintenance costs, and save production line change time. Effect

Pending Publication Date: 2022-02-01
SHENZHEN UPCERA DENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this production method based on changing the light transmittance by changing the raw material composition needs to consider the influence of different raw materials on the light transmittance when mixing ingredients, and the production line needs to be changed when producing lithium disilicate glass-ceramic restorations with different light transmittance The production process has the problem of low production efficiency

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  • Lithium silicate glass ceramic restoration and preparation method thereof
  • Lithium silicate glass ceramic restoration and preparation method thereof
  • Lithium silicate glass ceramic restoration and preparation method thereof

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preparation example Construction

[0033] The invention provides a method for preparing a lithium silicate glass-ceramic restoration, comprising the following steps:

[0034] A base glass frit is prepared, wherein the base glass frit comprises components of the following mass:

[0035]

[0036] The basic glass frit is melted and water-quenched into a glass frit;

[0037] In the present invention, water quenching refers to the process of pouring the molten base glass components into cold water. The melting temperature of the present invention is 1250-1650 DEG C, which can fully melt the basic glass frit.

[0038] The glass frit is dried and ground into a basic glass powder with an average particle size of 1-50 μm, mixed with a colorant and / or fluorescent agent, and then dry-pressed or isostatically pressed to make a green ceramic block;

[0039] The basic glass powder of the present invention can be mixed with a colorant, a fluorescent agent, or both, as long as the purpose of the present invention can be a...

Embodiment 1

[0068] According to formula 1 in Table 1, mix all components well and put them into a platinum crucible, put the platinum crucible into a heating furnace, control the melting temperature to 1250°C, and pour the melted glass into cold water , to obtain a glass frit. Dry the glass frit and grind it into a basic glass powder with an average particle size of 3 μm, pour it into a press mold, and make a green ceramic block after dry pressing with a pressing pressure of 50 MPa. Soak the green porcelain block in the high-transparency dyeing solution for 0.5 minutes. The formula of high light transmittance dyeing solution is: HCl (hydrochloric acid): 1% wt, HO (CH 2 CH 2 O) NH (polyethylene glycol): 16%wt, deionized water: 82.5%wt, SrCl 2 (Strontium chloride): 0.5% wt. Dry the soaked green ceramic block and sinter it in a vacuum atmosphere with a vacuum degree of 50 Pa and a sintering temperature of 750°C to obtain a green body; the obtained green body is die-cast by a hot die-cast...

Embodiment 2

[0070] Except that the green ceramic block is soaked in the low light transmittance dyeing solution, the others are the same as in Example 1. The formula of the staining solution is: HCl (hydrochloric acid): 1% wt, HO (CH 2 CH 2 O) NH (polyethylene glycol): 16%wt, deionized water: 82.5%wt, MgCl 2 (magnesium chloride): 0.5%wt.

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Abstract

The invention provides a lithium silicate glass ceramic restoration and a preparation method thereof. The preparation method comprises the following steps: preparing a basic glass material, melting the basic glass material, and carrying out water quenching to obtain a glass frit; drying the glass frit, grinding the glass frit into basic glass powder with an average particle size of 1-50 [mu] m, mixing the basic glass powder with a pigment and / or a fluorescent agent, and carrying out a dry pressing or isostatic pressing process to prepare a green ceramic block; soaking the green ceramic block in a high-transmittance staining solution or a low-transmittance staining solution for 0.5-5 minutes; drying the soaked green ceramic block, and sintering the green ceramic block in a vacuum atmosphere to obtain a green body; carrying out die casting on the obtained green body through a hot die casting process to obtain the lithium silicate glass ceramic restoration; or washing and cutting the obtained green body, and finally sintering to obtain the lithium silicate glass ceramic restoration. The production line changing time of the glass ceramic restoration and the maintenance cost of the crucible are saved, the production efficiency is improved, and the lithium silicate glass ceramic restoration is more suitable for large-scale production of factories.

Description

technical field [0001] The invention relates to the technical field of dental materials, in particular to a lithium silicate glass ceramic restoration and a preparation method thereof. Background technique [0002] Lithium disilicate glass-ceramic is a polycrystalline material with uniform distribution of crystal phase and glass phase. It has both the light transmission of glass and the strength of ceramics, and is widely used in the field of dental restoration. [0003] Dental lithium disilicate glass-ceramic restorations based on lithium disilicate glass-ceramic are usually produced by casting or sintering. In order to produce lithium disilicate glass-ceramic restorations with different light transmittances, the light transmittance of lithium disilicate glass-ceramics is generally changed by changing the raw material composition no matter whether the casting method or the sintering method is adopted. However, this production method based on changing the light transmittanc...

Claims

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Application Information

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IPC IPC(8): C03C10/04C03C17/00C03B11/00C03B23/00C03C4/02C03C4/12A61C13/083
CPCC03C10/0009C03C17/009C03C4/12C03C4/02C03B11/00C03B23/0013A61C13/083Y02P40/57
Inventor 韩成玮陈拥庆郑海峰金天罡邓宏达
Owner SHENZHEN UPCERA DENTAL TECH
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