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Raw material for all-ceramic dental restoration system and rapid prototyping method of raw material

A technology of oral restorative and raw materials, applied in dental preparations, dental prostheses, pharmaceutical formulations, etc., can solve problems such as large porosity, low solid content of ceramic raw materials, cracking, etc., and achieve high strength and fewer defects in ceramic products

Inactive Publication Date: 2015-10-28
谢宝军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because more resin is used, the solid content of ceramic raw materials is low, and the porosity is large, which is easy to cause problems such as cracking and deformation after processing, so high-quality ceramic products cannot be obtained.
Therefore, all-ceramic dental restorations cannot be directly processed by mainstream rapid prototyping technology.

Method used

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  • Raw material for all-ceramic dental restoration system and rapid prototyping method of raw material
  • Raw material for all-ceramic dental restoration system and rapid prototyping method of raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 50g of zirconia ultrafine powder (average particle size 1 micron), add it to 50g of sodium alginate (anionic water-soluble polymer) solution containing 2% by weight, disperse vigorously with an ultrasonic pulverizer for 10 minutes to form a colloid, and then add A small amount of 10% hydrochloric acid was used to adjust the pH to 5 to make the colloid gel, and then homogenized 3 times with a three-roll mill to finally obtain a rapid prototyping raw material with a solid content of 50%. After the raw material is rapidly formed into an embryo body, it is put into a microwave oven and dried and sintered at a temperature of 1600 degrees Celsius for 10 minutes to obtain a finished product.

Embodiment 2

[0043] Take 45g of zirconia ultrafine powder and 5g of alumina ultrafine powder (average particle size 1 micron), add it to 50g of sodium alginate (anionic water-soluble polymer) solution containing 2% by weight, and disperse vigorously with an ultrasonic pulverizer Form a colloid in 10 minutes, then add a small amount of 10% hydrochloric acid to adjust the pH to 5 to gel the colloid, homogenize it with a three-roll mill for 3 times, and finally obtain a rapid prototyping raw material with a solid content of 50%. After the raw material is used for rapid molding into an embryo body, it is first treated with cold isostatic pressing for 10 minutes, and then put into a microwave oven for drying and sintering at a temperature of 1600 degrees Celsius for 10 minutes to obtain a finished product.

Embodiment 3

[0045] Ultrafine ceramic powder 75g, colorant 5g, fluorescer 5g, dispersant 5g, coagulant 20g, thickener 5g, flow aid 5g, strengthening aid 10g, the average particle size of described ultrafine ceramic powder is 10 microns , to prepare raw materials. The rest are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a raw material for an all-ceramic dental restoration system and a rapid prototyping method of the raw material, which belongs to the technical field of materials and preparation methods thereof. The raw material comprises the following components in weight part: 20 to 75 parts of ultrafine ceramic powders, 0.1 to 5 parts of coloring agent, 0.1 to 5 parts of fluorescent agent, 0.1 to 5 parts of dispersant, 0 to 20 parts of flocculating agent, 0 to 5 parts of thickening agent, 0 to 5 parts of flow promoting agent and 0 to 10 parts of strengthening auxiliary. According to the technical scheme of the invention, embryo bodies can be directly molded without the need of adding any binder. Therefore, dental restorations are high in strength after the later sintering process.

Description

technical field [0001] The invention belongs to the technical field of materials and preparation methods thereof, in particular to a raw material for making all-ceramic oral restorations and a rapid prototyping method thereof. Background technique [0002] There are two reasons why people are eager to restore the oral cavity, one is functional restoration, and the other is cosmetic effect. Therefore, oral restorations not only require high dimensional accuracy, but also must meet a series of mechanical properties (strength, hardness, toughness), optical properties (transparency, color, fluorescence), physical and chemical properties (corrosion resistance, water resistance, stability) , and biological properties (compatibility), etc. Ceramic material is considered to be the best material to match the appearance of human teeth, and its excellent aesthetics, wear resistance, and color stability make it the most common oral restoration material. At present, ceramics are mainly...

Claims

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Application Information

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IPC IPC(8): A61K6/027A61C13/083A61C13/08
Inventor 谢宝军
Owner 谢宝军
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