Glass used as dental veneering porcelain, preparation method and application thereof

A technology for veneering porcelain and glass, which is applied in glass production and other fields, and can solve problems such as the performance difference of leucite glass-ceramic veneering porcelain

Active Publication Date: 2014-07-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be pointed out that although the components contained in various patents are the same, that is, they all contain SiO 2 、Al 2 o 3 、K 2 O, Na 2 O and B 2 o 3 , but because small changes in the content of these components may cause significant differences in the performance of leucite glass-ceramic veneered porcelain, the original glass composition protected by each patent has its own uniqueness

Method used

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  • Glass used as dental veneering porcelain, preparation method and application thereof
  • Glass used as dental veneering porcelain, preparation method and application thereof
  • Glass used as dental veneering porcelain, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1～11

[0059] The preparation of embodiment 1~11 leucite glass-ceramics

[0060] According to each component mass percent of each embodiment listed in table 2, take respectively a certain amount of analytically pure SiO 2 , B 2 o 3 、Al 2 o 3 、Na 2 CO 3 and K 2 CO 3 , respectively with a planetary ball mill to fully mix and grind, take out and dry; respectively put the powder in a platinum alloy crucible, place it in a box-type resistance furnace, raise the temperature to 1200 ° C ~ 1400 ° C in an air atmosphere, and keep the temperature for 2 hours ~ After 5 hours, take it out at 1100°C and pour it into cold water for rapid cooling to form small pieces of glass clinker; after the glass is pulverized by a ball mill, pass through a 200-300-mesh standard sieve to obtain glass powder for dental veneering porcelain . The powder is heat-treated at 700°C to 1100°C to obtain leucite glass-ceramics. figure 2 It is the XRD spectrum of the glass-ceramic corresponding to Example 1. ...

Embodiment 12

[0064] Example 12 Thermal expansion matching test of leucite glass-ceramics

[0065] Two kinds of glasses used as dental veneer porcelain were prepared according to the composition of Example 3 and Example 11 respectively, and then the two kinds of glasses used as dental veneer porcelain were respectively ball-milled into powder and passed through a 200-mesh standard sieve. The two kinds of glass powders are processed at 700°C to 1100°C respectively to form corresponding glass-ceramics, and then the two kinds of glass-ceramic balls are ground into powder and passed through a 200-mesh standard sieve for later use. Take 1 gram of the two types of glass-ceramic powders respectively, dry-press them under a pressure of 400 MPa, and then hold them under a vacuum condition of 850°C for 1 min to sinter and compact them. Cut the two glass-ceramics into cuboids with a length of 15 mm and a width of 4 mm, and use a high-temperature dilatometer (L75 / 1550, LINSEIS, Germany) to test the the...

Embodiment 13

[0066] Example 13 Leucite glass-ceramics thermal stability test:

[0067] Two kinds of glasses used as dental veneer porcelain were prepared according to the composition of Example 3 and Example 11 respectively, and then the two kinds of glasses used as dental veneer porcelain were respectively ball-milled into powder and passed through a 200-mesh standard sieve. The two kinds of glass powders are processed at 700°C to 1100°C respectively to form corresponding glass-ceramics, and then the two kinds of glass-ceramic balls are ground into powder and passed through a 200-mesh standard sieve for later use. Take 1 gram of the two types of glass-ceramic powders respectively, dry-press them under a pressure of 400 MPa, and then hold them under a vacuum condition of 850°C for 1 min to sinter and compact them. Test the thermal expansion coefficient of the glass-ceramics as a function of the number of times of porcelain firing: Cut the glass-ceramics corresponding to Example 3 into a re...

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Abstract

The invention relates to a glass used as a dental veneering porcelain. The glass comprises, by mass, 50%-70% of SiO2, 6%-17% of B2O3, 6%-25% of Al2O3, 1%-10% of Na2O, and 17%-30% of K2O. The glass undergoes heat treatment at 700DEG C-1100DEG C, and leucite microcrystalline glass with different thermal expansion coefficients can be obtained. The microcrystalline glass only contains tetragonal phase leucite crystals, the size of which is less than 4 micrometers. The leucite microcrystalline glass has very good thermal stability, after experiencing a porcelain fusing program 10 times, the thermal expansion coefficient change of the leucite microcrystalline glass is less than 2%, and in a 120min process of heat preservation at a porcelain fusing temperature of 850DEG C, the size and number of the leucite crystals do not have obvious change. The leucite microcrystalline glass can be used as a transparent porcelain and incisal porcelain in the veneering porcelain, and also can be used as a body porcelain if a pigment is added.

Description

technical field [0001] The invention relates to a glass used as dental veneer porcelain, a preparation method and an application thereof, belonging to the field of biological materials. Background technique [0002] Teeth are prone to diseases in the human body. If a large area of ​​teeth is damaged due to disease or trauma, it is necessary to restore the function of the teeth with an artificial crown. At present, artificial crowns are mainly divided into two types: Porcelain fused to metal restoration (PFM) and all-ceramic restoration. Metal-ceramic teeth use metal as the base, while all-ceramic teeth use ceramics as the base. Both of them need to be fused with veneering porcelain to provide aesthetic performance. Veneer porcelain can usually be divided into three layers, namely transparent porcelain, incisal porcelain and body porcelain. figure 1 It is a typical schematic diagram of porcelain fused to metal. It should be pointed out that the body porcelain presents diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C10/00C03B32/02
CPCY02P40/57
Inventor 彭练朱庆山
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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