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Casting embedding material for dental cast porcelain and preparation method of casting embedding material

An embedding material, dental technology, used in dental preparations, dentistry, dental prostheses, etc., can solve problems such as mismatching expansion rates

Pending Publication Date: 2022-04-19
浙江丹斯登生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the expansion rate of the existing metal-ceramic embedding material does not match that of glass ceramics for casting, the present invention proposes an embedding material for dental ceramic casting and its preparation method, mainly through component design and particle size of raw materials. Adjust the comprehensive expansion rate of the embedding material to match the shrinkage rate of glass ceramics

Method used

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  • Casting embedding material for dental cast porcelain and preparation method of casting embedding material
  • Casting embedding material for dental cast porcelain and preparation method of casting embedding material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Prepare several raw materials such as ammonium dihydrogen phosphate, quartz, cristobalite, magnesium oxide and ammonium aluminum carbonate, and dry all raw materials at 90°C for 12h. Then, in a workshop with a humidity less than 30%, pass the dried ammonium dihydrogen phosphate through 200-mesh, 250-mesh, and 400-mesh sieves continuously. For feeding ammonium dihydrogen phosphate 250-mesh sieve and for ammonium dihydrogen phosphate 400-mesh sieve unloading; in a workshop with a humidity less than 30%, pass the dried quartz continuously through 250-mesh and 300-mesh sieves, and take 300-mesh The sieve material of the sieve is marked as quartz 300-mesh sieve material; in a workshop with a humidity less than 30%, the dried cristobalite is continuously passed through a 300-mesh sieve and a 400-mesh sieve, and the 400-mesh sieve material is taken. Marked as cristobalite 400-mesh sieve feeding; in a workshop with a humidity less than 30%, pass the dried magnesia through a 400...

Embodiment 2～5

[0022] Examples 2-5 Prepare the embedding material for dental ceramic casting of the present invention, the preparation method is completely consistent with Example 1, wherein the mass ratio of each component in the powder material, the drying process parameters of each raw material in the powder material , powder material mixing process parameters, and the mass concentration of silica sol in the liquid material are shown in Table 1 for details.

[0023] Component design and preparation process parameters of the embedding material for dental casting porcelain in Table 1 Example 1-5

[0024]

[0025]

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Abstract

An embedding material for dental cast porcelain comprises a powder material and a liquid material, and the powder material is composed of the following components in percentage by mass: 10%-30% of ammonium dihydrogen phosphate, 35%-55% of quartz, 5%-25% of cristobalite, 3%-15% of magnesium oxide and 1%-20% of ammonium aluminum carbonate; the liquid material is a silica sol aqueous solution with the mass concentration of 20-50%. The preparation process of the powder material is as follows: under the condition that the humidity of a working environment is controlled to be less than 30%, the technological processes of raw material drying, raw material particle size matching, raw material mixing and the like are sequentially performed. Ammonium aluminum carbonate is added into a powder material, the ammonium aluminum carbonate is decomposed into amorphous aluminum oxide at about 400 DEG C to generate expansion, then is converted into gamma-aluminum oxide at about 600 DEG C to generate expansion, and finally reacts with magnesium oxide at about 800 DEG C to generate magnesium aluminate spinel to generate expansion again; the expansion coefficient of the embedding material is synergistically adjusted.

Description

technical field [0001] The invention relates to the field of dental treatment auxiliary materials, in particular to a casting embedding material for dental ceramic casting and a preparation method thereof. Background technique [0002] With the improvement of human living standards, people pay more and more attention to oral care, and teeth whitening is also more and more popular. Traditional tooth whitening mainly uses physical or chemical methods to remove tooth stains, plaque or pigment deposits on the surface of the teeth from the teeth, thereby restoring the original color of the teeth to achieve the whitening effect. But for more serious tetracycline teeth, dental fluorosis, discolored teeth, etc., the traditional whitening effect is not ideal. At present, the discolored teeth and tooth stains, dental plaque, pigment deposits, etc. on the surface of the teeth are covered by glass ceramic veneers, which has good aesthetic effects and high bending strength, and has been...

Claims

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Application Information

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IPC IPC(8): A61K6/19A61K6/807A61K6/802C03B19/02
CPCA61K6/19A61K6/807A61K6/802C03B19/02
Inventor 王焕平裴魏魏杨清华赵思源曹永盛陈超
Owner 浙江丹斯登生物材料有限公司