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Pyrochlore phase-lithium disilicate glass ceramic, preparation method thereof and dental restoration

A technology of lithium disilicate and glass ceramics, which is applied in the field of dental ceramic materials, can solve the problems that the chemical corrosion resistance of dental ceramics needs to be improved, and achieve the effect of anti-cavity aesthetics, easy processing, and good resin luster

Active Publication Date: 2022-05-13
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Dental materials used in the oral cavity will be corroded by various fluids in the oral cavity. At present, the chemical corrosion resistance of dental ceramics needs to be improved

Method used

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  • Pyrochlore phase-lithium disilicate glass ceramic, preparation method thereof and dental restoration
  • Pyrochlore phase-lithium disilicate glass ceramic, preparation method thereof and dental restoration
  • Pyrochlore phase-lithium disilicate glass ceramic, preparation method thereof and dental restoration

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Embodiment 1-7

[0032] Embodiment 1-7 provides a kind of pyrochlore phase-lithium disilicate glass-ceramic, and its matrix component is shown in Table 1 respectively, and its preparation method step is as follows:

[0033] SiO2 , Li 2 O, Nb 2 o 5 , CaO, TiO 2 , ZrO 2 、Al 2 o 3 、K 2 O, F, P 2 o 5 Mix in proportion, at T S lower melt t S , and then pour the molten glass into water to obtain granules. The granules after water quenching are ground into powder, the granules are prepared, and the coloring agent or fluorescent agent is added and pressed into blanks to obtain powder green compacts. The powder green compact is sintered, the first stage is a certain degree of vacuum, T 烧结1 lower sintering 烧结1 , in order to realize the crystallization of lithium disilicate; the second stage is a certain degree of vacuum, T 烧结2 lower sintering 烧结2 , to form a pyrochlore phase, and finally obtain a pyrochlore phase-lithium disilicate glass-ceramic.

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Abstract

The invention provides a pyrochlore phase-lithium disilicate glass ceramic and a preparation method thereof, and a dental restoration, the pyrochlore phase-lithium disilicate glass ceramic comprises the matrix components of SiO2, Li2O, ZrO2, CaO, TiO2, Al2O3, K2O and P2O5, and also comprises Nb2O5 and F, the mass percentage of Nb2O5 is 15-30%, the mass percentage of CaO is 5-10%, and the mass percentage of F is 0.5-2%. By forming a microstructure with lithium disilicate as a primary crystal phase and a pyrochlore phase as a secondary crystal phase, the glass ceramic with high chemical resistance is obtained, the glass ceramic can be easily processed into a dental restoration, and the obtained dental restoration not only has very good chemical stability, but also has relatively good resin gloss, can improve the aesthetic effect, and has a good application prospect. And moreover, glazing is not needed, the product can be directly used in a polishing and grinding mode, contains fluorine, and can reduce decayed teeth.

Description

technical field [0001] The invention relates to the field of dental ceramic materials, in particular to a pyrochlore phase-lithium disilicate glass ceramic, a preparation method thereof, and a dental restoration. Background technique [0002] Over time or improper use of teeth will cause pathological phenomena such as dental caries, wear and periodontal disease, and timely treatment or restoration is required at this time. Dental ceramics are glass-ceramic materials and products used in dental treatment and restoration. [0003] In the lithium oxide-silica system, lithium disilicate (Li 2 Si 2 o 5 ) Glass-ceramic is currently the most commonly used dental ceramic material. Under a certain process, crystallization can be caused by the lithium metasilicate phase. Lithium metasilicate ceramics are in the middle stage and have very low strength, so that the associated glass ceramics can be easily processed by CAD / CAM. By subsequent conversion to lithium disilicate in a sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03B11/00C03B32/02A61C13/08A61C13/083
CPCC03C10/00C03B11/00C03B32/02A61C13/08A61C13/083A61C13/0835Y02P40/57
Inventor 朱恒徐姗姗宋锡滨何玲玲焦英训崔莉莉
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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