Color-masking zirconia veneer

A zirconia and opaque technology, which is used in compression mold cups, dental prostheses, dentistry, etc., can solve problems such as reducing the reliability of zirconia restorations, achieve good aesthetic restoration effects, and improve specific surface and surface roughness. , the effect of high strength and toughness

Active Publication Date: 2018-08-07
HANGZHOU ERRAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second generation of cast porcelain IPS EmpressII, the bending strength is 300-400MPa, which can express the color and texture of teeth well, but external staining is still required
However, mechanical trauma to the material introduced by this method has been shown to reduce the reliability of zirconia restorations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0071] 2. Preparation of veneer raw materials:

[0072] 2.1 white zirconia

[0073] The slurry used for veneer molding is made by liquid phase co-precipitation method or hydrothermal-hydrolysis method.

[0074] 2.1.1 The liquid-phase co-precipitation method is specifically:

[0075] Slowly drop the precursor body fluid containing yttrium and zirconium into the precipitant, stir vigorously to make it fully react, and age for more than 8-12 hours after the reaction, quickly separate with a centrifuge, vacuum filter the precipitate, and use distilled water, ethanol After washing and drying, a precursor of yttrium partially stabilized zirconia with a yttrium content of 2-6mol% is obtained as the main phase; the precursor is mixed with a dispersant accounting for 1-3% of the weight of the precursor, and deionized water is added to form a solid phase Slurry with a content of 2-15vol%, adjust the pH to 3-6, stir and mix, and then add it to the planetary mill for ball milling for 10...

manufacture example

[0107] Alumina-doped Y Partially Stabilized ZrO 2 The sol preparation method is: alumina (1-5mol%) doped with Y (2-6mol%) to partially stabilize ZrO 2 The example of sol manufacturing is as follows: The method of reverse dripping is used to prepare alumina-doped Y-stabilized ZrO 2 Sol, the prepared precipitant NH 4 HCO 3 (10-50%)+NH 3 ·H 2 O solution (50-90%) is placed in the Erlenmeyer flask, and the Erlenmeyer flask is placed in a magnetic stirrer or a constant temperature water bath reactor with stirring, and the prepared Al-containing 3+ , Y 3+ 、Zr 4+ The mother liquor includes zirconium hydroxide (ZrO(OH) 2 ·nH 2 O≥99%), zirconium oxychloride (ZrOCl 2 ·8H 2 O≥99%), zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 One of O≥99%); Yttrium nitrate Y (NO 3 ) 3 ·6H 2 O, yttrium chloride (YCI 3 ·6H 2 One of O≥99.99%); aluminum chloride (AlCl 3 ≥99%), aluminum nitrate (Al(NO 3 ) 3 9H 2 One of O), slowly drop into the precipitant, and vigorously stir to make it fully rea...

Embodiment 1

[0126] Example 1. Abutment tooth A2 color veneer restoration one

[0127] Using one of the slurries recorded in 2.1.1-2.1.3 as a raw material, based on the pure-form manufacturing principles of computer-aided design (CAD) and computer-aided manufacturing (CAM), the white oxide was prepared by layer-by-layer additive method of colloidal deposition The zirconium restoration body is milled on the bonding surface (or wearing tooth surface) of the zirconia veneer green body for bonding with natural teeth to form micro-textures for improving the specific surface area and surface roughness: use SUM3D is used for processing programming, and the grid tool path is set to be vertically staggered, the grid depth is 0.03mm, the grid spacing is 0.3mm, and the grid range is 2mm from the edge, such as Figure 5 . The tool is a 0.6mm carbide ball end milling cutter, the spindle speed is 15000rpm, the milling feed is 1000mmpm, and the processing program is generated. Import the processing pro...

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Abstract

The invention discloses a color-masking zirconia veneer. The color-masking zirconia veneer is prepared by the steps of carrying out color masking after micro-sculptures of a zirconia veneer are processed, and finally carrying out sand blasting or processing a flake zirconia film. According to the color-masking zirconia veneer, micron-scale sculptures are prepared on the surface without mechanically damaging the material, and a porous flake surface from a nano scale to a micron scale is obtained by virtue of repeated film plating techniques before and after sintering, so that a mechanical interlocking structure between the specific surface area of the zirconia veneer and an adhesive, the adhesion bonding between the zirconia veneer and a natural tooth is enhanced, and the zirconia veneer can meet the clinical requirements on the adhesive property. The color-masking zirconia veneer has the beneficial effects that a color-masking function is considered, meanwhile, the strength of the zirconia veneer is guaranteed, and a very good aesthetic repairing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of making dental ceramic materials, in particular to a color-shielding zirconia veneer. Background technique [0002] Veneers are a widely used product in clinical aesthetic restoration. Porcelain restoration materials have been used in clinical practice for 100 years. At present, all-ceramic veneer materials with more clinical applications can be divided into leucite-based all-ceramic, Lithium disilicate-based all-ceramic, alumina-based all-ceramic, zirconia-based all-ceramic and other systems; can be divided into feldspar and non-feldspar according to clinical treatment methods, and can be divided into powder slurry coating according to different production processes Plastic, cast porcelain and cutting ceramics. The strength of alumina porcelain powder sintered veneer and zirconia porcelain block cutting veneer is better than that of silicate cast porcelain veneer, but compared with the translucency of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/488C04B35/622C04B35/64C04B41/89C04B41/87B24C1/08A61K6/02A61K6/00
CPCC04B35/488C04B35/4885C04B35/622C04B35/64C04B41/5027C04B41/5031C04B41/5036C04B41/5041C04B41/5042C04B41/5045C04B41/5063C04B41/52C04B41/87C04B41/89B24C1/08C04B2235/3229C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/9653C04B2235/9661C04B2235/785C04B2235/6562C04B2235/6567C04B2235/6583A61K6/813A61K6/816A61K6/824A61K6/822A61K6/802A61K6/818A61K6/20C04B41/455C04B41/4535C04B41/0072C04B41/4539C04B41/522C04B41/4537
Inventor 沈志坚李廷凯赵武元刘文广
Owner HANGZHOU ERRAN TECH
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