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Method for preparing dental colored nano-zirconia

A nano-zirconia and nano-oxidation technology, which is applied in zirconia, dentistry, dental preparations, etc., can solve the problems of easy agglomeration of particles, large influence, and large particle surface energy, so as to achieve uniform color distribution and prevent secondary The effect of particle growth and accurate and uniform color

Inactive Publication Date: 2010-12-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of infiltrating the dyeing solution is simple to operate, but it is prone to uneven coloring, which is greatly affected by the operation, while adding colored oxides to the zirconia material during production can control the color accuracy and uniformity, and has an impact on the translucency of the material. Smaller, is an ideal color solution
It has been shown in the literature that a variety of colored oxides can be used to color zirconia, such as Fe 2 o 3 , CeO 2 , Er 2 o 3 , Bi 2 o 3 , Pr 2 o 3 , Mn 2 O and V 2 O, etc., but these oxides can not be used alone to obtain satisfactory results, and some also have a negative impact on the mechanical properties of the material, and the use of a single oxide cannot meet the color requirements of dental restorations.
There are many ways to prepare nano-zirconia. The biggest problem is that due to the small particle size of the powder, the surface energy of the particles is very large, and the particles are prone to agglomeration.

Method used

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  • Method for preparing dental colored nano-zirconia
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  • Method for preparing dental colored nano-zirconia

Examples

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Embodiment 1

[0028] The preparation of embodiment 1 dental coloring nano zirconia

[0029] First, select TritonX-100, n-hexanol, and n-octane as the surfactant, co-surfactant, and oil phase respectively, and mix 0.8mol / 1 zirconium nitrate solution, colorant and 15mol / 1 ammonia water were added to the organic mixed solution, and two parts of microemulsions were prepared, so that the volume ratio of each component was water: TritonX-100: n-hexanol: n-octane == 1: 2.1: 2.7: 15. Wherein, the concentration of soluble zirconium salt is 0.1-2.0mol / 1, and the amount of iron oxide and bismuth oxide is 1000ppm of iron oxide and 400ppm of bismuth oxide (introduced with its equimolar iron nitrate or bismuth nitrate respectively); then, at 25°C The obtained two microemulsions were mixed together under vigorous stirring, and the stirring was continued for 1 hour. The lower layer liquid in the emulsion system was centrifuged at 9000 rpm for 30 minutes. Wash with absolute ethanol, dry the obtained solid...

Embodiment 2

[0030] Preparation of Example 2 Dental Colored Nano Zirconia

[0031] In Example 1, the same experiment was carried out with the surfactant Tween-20 instead of TritonX-100 (the volume ratio of Tween-20 to n-hexanol, n-octane, and water was 3:2:15:1) to obtain zirconia Powder, after roasting at 450°C, its specific surface area is measured to be 67.4m 2 / g, the corresponding average particle size is 15.1nm.

Embodiment 3

[0032] The preparation of embodiment 3 dental coloring nano zirconia

[0033] In Example 1, the surfactant Span-80 was used instead of TritonX-100, (the volume ratio of Span-80 to n-hexanol, n-octane, and water was 3:2:15:1), and the same experiment was carried out to obtain Zirconium powder, after being calcined at 450°C, its specific surface area is measured to be 60.4m 2 / g, the corresponding average particle size is 16.8nm.

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Abstract

The invention provides a method for preparing dental colored nano-zirconia and the nano-zirconia prepared by the method. Prepared dental colored nano-zirconia powder can adopt a clinically common and general colored zirconia color scheme, so that tooth color matching becomes simple and practical, a clinical butment reserved space can be saved and good texture is achieved.

Description

technical field [0001] The invention relates to a preparation method of dental colored nano-zirconia, belonging to the technical field of nano-materials. Background technique [0002] White yttrium-stabilized zirconia ceramics have a certain degree of translucency, making it easier to simulate natural tooth color. At present, uncolored dental zirconia is mostly white to ivory, which cannot meet the clinical requirements for the color of restorations. The surface often needs to be shaded, which will cause the material to lose part of its transparency. If the color of zirconia itself is adjusted to The lightness and saturation of the teeth to be restored will make the color matching of the teeth easier, and at the same time save the space for clinical abutment preparation and obtain a good texture. Generally, there are two methods for coloring, one is to immerse pre-sintered zirconia in a dyeing solution containing metal oxides, and then sinter, such as the current practice o...

Claims

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Application Information

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IPC IPC(8): A61K6/02C01G25/02
Inventor 李伟廖运茂赵永旗
Owner SICHUAN UNIV
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