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Preparing method for coloring zirconium oxide powder and multilayer and multicolor dental ceramics

A zirconia powder and dental technology, which is applied in the field of zirconia powder, can solve the problems of complex process, increased difficulty, and inability to match VITA16 colors, etc., and achieve the effect of simple operation by technicians, simple operation by technicians, and rich colors

Active Publication Date: 2016-01-27
AIDITE (QINHUANGDAO) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color powder used in this method is only yellow and orange, and the color is monotonous. The prepared complex color ceramics cannot meet the general VITA16 color of dentistry, and further external dyeing is required, which is troublesome to operate.
[0005] The existing technology is complicated in process, and the prepared color is single, which cannot match the general VITA16 color, and the technicians in the later stage need to carry out external dyeing, which makes it more difficult and the overall cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare raw materials according to the following mass percentages:

[0030] Cerium nitrate 10%, high-transparency dental zirconia powder 90%

[0031] A preparation method of colored zirconia powder, comprising the following steps:

[0032] Step 1. Dissolve cerium nitrate in water until it is completely dissolved to obtain a solution. The amount of water used is 70% of the mass of the solution. Add high-transparency dental zirconia powder to the solution, stir evenly, and pour it into the oven. in the tray;

[0033] Step 2, put the above-mentioned drying tray in a cool and ventilated place, and dry it naturally to obtain dry powder;

[0034] Step 3, put the dry powder into the ball mill tank for ball milling, the ball milling time is 50 minutes; then sieve with a 120-mesh sieve to obtain a small powder with uniform particle size; the remaining powder with a larger particle size needs to be returned to the ball mill The tank is ball milled again, and repeated several t...

Embodiment 2

[0038] Prepare powder small material raw materials according to the following mass percentages:

[0039] 25% of cerium nitrate, 2% of erbium nitrate, 73% of dental zirconia powder

[0040] A preparation method of colored zirconia powder, comprising the following steps:

[0041] Step 1. Dissolve cerium nitrate and erbium nitrate in ethanol until they are completely dissolved to obtain a solution. The amount of ethanol is 50% of the mass of the dissolved liquid. Add medium-permeable dental zirconia powder to the solution and stir evenly , poured into the baking pan;

[0042] Step 2, put the above-mentioned drying tray in a cool and ventilated place, heat and dry at 200°C for 5 hours; obtain dry powder;

[0043] Step 3, put the dry powder into the ball mill tank for ball milling, the ball milling time is 35 minutes; then sieve with a 150-mesh sieve to obtain a small powder with uniform particle size; the remaining powder with a larger particle size needs to be returned to the b...

Embodiment 3

[0047] Prepare powder small material raw materials according to the following mass percentages:

[0048] 15% of cerium nitrate, 1% of erbium chloride, 0.5% of praseodymium nitrate, 1% of terbium sulfate, 72.5% of low permeability dental zirconia powder

[0049] A preparation method of colored zirconia powder, comprising the following steps:

[0050] Step 1, cerium nitrate 15%, erbium chloride 1%, praseodymium nitrate 0.5%, terbium sulfate 1% are dissolved in the mixed solution of water and ethanol, after fully dissolving, obtain solution, the consumption of water and ethanol is dissolved 90% of the solution quality, wherein in the mixed solution, the mass percentage of water is 80%, and the mass percentage of ethanol is 20%. Add 72.5% of low-permeability dental zirconia powder to the solution, stir evenly, and pour it into the baking tray middle;

[0051] Step 2, put the above-mentioned drying tray in a cool and ventilated place, heat and dry, the temperature of heating and dr...

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PUM

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Abstract

The invention discloses a preparing method for coloring zirconium oxide powder and a preparing method for multilayer and multicolor dental ceramics. The preparing method comprises the steps that 1, salt colorant of soluble rare earth is dissolved into water, or ethyl alcohol or mixed liquor of the water and ethyl alcohol, high-transparency or medium-transparency or low-transparency dental zirconium oxide powder is added, and the mixture is stirred and poured into a baking disc; 2, the baking disc is placed in a shady and cool place and dried to obtain dry powder; 3, ball milling is carried out, and screening is carried out through a 60-300-mesh separating sieve to obtain small powder; 4, the small powder and one or more kinds of high-transparency, medium-transparency and low-transparency dental zirconium oxide powder are mixed uniformly according to different proportions to obtain the coloring zirconium oxide powder. According to the preparing method for the multilayer and multicolor dental ceramics, three to seven kinds of the coloring zirconium oxide powder of the same tone are pressed in a layering and dry pressing mode, pressed in an isostatic pressing mode, and presintered according to the color sequence from dark to light and transparency from small to big to obtain a multilayer and multicolor zirconium oxide blank. The preparing method can prepare dental prosthesis with the transparency and the chromaticity being similar to those of natural teeth.

Description

technical field [0001] The present disclosure relates generally to zirconia powders, and more particularly to methods of making colored zirconia powders and multilayer multicolor dental ceramics. Background technique [0002] In prosthodontics, the problem of color reproduction is an important indicator that affects the aesthetics of restorations and teeth. The color of uncolored zirconia ceramics is mostly white to ivory, and the color of the prepared restorations is single, which is difficult to meet the clinical requirements for material color. Complexity requirements, so it needs to rely on internal dyeing, external dyeing or use colored zirconia ceramic blocks to complete. [0003] The internal dyeing of dental zirconia restorations will be affected by human factors, and the process stability is poor. The length of soaking time and the number of brushing times have a great influence on the color of the final restoration. There is no fixed operation standard for externa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626
Inventor 陈莹莹吴海艳王丁李洪文
Owner AIDITE (QINHUANGDAO) TECH CO LTD
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