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Dental glass-ceramic with color gradient change combined by frit + colorant

A glass-ceramics and color gradient technology, applied in the field of dental glass-ceramics and dental glass-ceramics, can solve the problems that the product color is difficult to meet the color requirements of different teeth, and the preparation process is complicated, so as to achieve process controllability and operability Strong, guaranteed mechanical properties, and stable performance of dentures

Inactive Publication Date: 2016-02-24
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the technical defects that the preparation process of the existing dental restoration materials is complicated, and the color of the prepared product is difficult to meet the color requirements of different teeth, the present invention provides a kind of glass-ceramic for teeth with simple and feasible process, and its appearance color can be adjusted according to different Gradient changes in the cloth method to adjust the color of dentures to meet the color requirements of different teeth

Method used

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  • Dental glass-ceramic with color gradient change combined by frit + colorant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The white glass-ceramic frit is smelted from the following raw materials in parts by weight: SiO 2 46 copies, Al 2 o 3 3.3 parts, CaO13 parts, BaO2 parts, MgO3.6 parts, B 2 o 3 2 parts, Na 2 O+K 2 O13 parts, CaF 2 0.6 parts, P 2 o 5 4.5 parts, ZnO3 parts, Sb 2 o 3 1 copy;

[0027] The yellow pigment is calcined from the following raw materials in parts by weight: ZrO 2 91 copies, V 2 o 5 9 parts, Al 2 o 3 0 copies;

[0028] The specific preparation method is as follows:

[0029] (1) Preparation of white glass-ceramic frit powder:

[0030] ① Weigh the white frit raw materials according to the above weight parts, mix them and pour them into a blender, and stir for 1 hour;

[0031] ② Pour into a kiln at 1550°C, melt for 2 hours, quench in water, dry, and crush into powder;

[0032] (2) Preparation of yellow pigment:

[0033] ① Weigh the raw materials of the yellow colorant according to the above weight parts, mix them and pour them into a blender, and s...

Embodiment 2

[0042] Compared with Example 1, Embodiment 2 is to change the mutual mixing ratio of the white glass-ceramic frit and the yellow pigment and the ratio of each component in the pigment; the microstructure of the prepared glass-ceramics is shown in figure 1 .

[0043] The white glass-ceramic frit is smelted from the following raw materials in parts by weight: SiO 2 46 copies, Al 2 o 3 3.3 parts, CaO13 parts, BaO2 parts, MgO3.6 parts, B 2 o 3 2 parts, Na 2 O+K 2 O13 parts, CaF 2 0.6 parts, P 2 o 5 4.5 parts, ZnO3 parts, Sb 2 o 3 1 copy;

[0044] The yellow pigment is calcined from the following raw materials in parts by weight: ZrO 2 91.5 copies, V 2 o 5 8 parts, Al 2 o 3 0.5 copies;

[0045] The mixing ratios of white glass-ceramic frit powder and yellow pigment are 99.5:0.5, 99:1, 98.5:1.5, 98:2, 97.5:2.5, 97:3 respectively.

[0046] The bending strength tested on the WDW3100 electronic universal testing machine is 87.4MPa, and the Vickers hardness tested on t...

Embodiment 3

[0050] Embodiment 3 Compared with Embodiment 2: increase the number of mixing ratio groups of frit and colorant and reduce the cloth thickness.

[0051] The mixing ratios of white glass-ceramic frit and yellow pigment are 99.5:0.5, 99:1, 98.5:1.5, 98:2, 97.5:2.5, 97:3, 96.5:3.5, 96:4; The laying thickness of mixed frit powder is 4mm.

[0052] The bending strength tested on the WDW3100 electronic universal testing machine is 85.1MPa, and the Vickers hardness tested on the FM-700 microhardness tester is 5.96GPa (HV 0.5 ), the appearance color presents a gradient change from white to yellow.

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Abstract

The invention discloses frit-pigment compounded tooth microcrystalline glass with a colour gradient change. The frit-pigment-compounded tooth microcrystalline glass with the colour gradient change is obtained by founding a white microcrystalline glass frit and yellow pigment respectively, paving white microcrystalline glass frit powder on a forming die, then sequentially paving a plurality of groups of mixed frit powder thereon according to a principle that the ratio of the yellow pigment is increased, and finally carrying out sintering treatment in a crystallization furnace. According to the frit-pigment compounded tooth microcrystalline glass with the colour gradient change, which is disclosed by the invention, the microcrystalline glass approximating to the tooth colours of different people can be prepared by changing the mixing ratio of the two powders in the mixed powder on the premise of no need of re-preparing the white microcrystalline glass frit and the yellow pigment; the preparation process is few in containment factors, high in controllability and operability, flexible in colour regulation, and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a dental glass-ceramic with a color gradient change between yellow and white, and specifically relates to a method of mixing white glass-ceramic frit and yellow color material according to a certain proportion and sintering The glass-ceramics prepared by the method can be applied to teeth. Background technique [0002] Glass-ceramics is used as a tooth restoration material because of its good mechanical strength, chemical stability, and biocompatibility, and it is playing an increasingly important role in clinical medicine. [0003] "Journal of Liaoning University (Natural Science Edition)" in the third issue of 2006 Yang Donghui published an article "Application of glass-ceramics in tooth restoration materials", the conclusion is: tooth glass-ceramic restoration materials started relatively late in my country , but it has become one of the jointly developed topics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00
Inventor 姚树玉董亚群韩野邵丹张伟伟
Owner SHANDONG UNIV OF SCI & TECH
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