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Dental complex color machinable zirconia ceramics and preparation method

A zirconia ceramic, zirconia technology, applied in dental preparations, dentistry, dental prostheses, etc., can solve the problems of unfavorable abutment retention and protection, increased light scattering, restoration failure, etc. The effect of repairing success rate, improving machining efficiency and accuracy, and reducing the effect of translucency

Inactive Publication Date: 2011-12-21
PEKING UNIV SCHOOL OF STOMATOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of laminated all-ceramic restoration based on zirconia substrate-thick veneer has the following disadvantages: (1) In order to ensure the thickness of veneer, a large amount of tooth preparation is required, which is not conducive to the preservation and protection of abutment teeth; ( 2) It requires a laboratory to complete the external dyeing and porcelain decoration, the color matching steps are cumbersome, and the processing technology is complicated, and the biggest advantage of CAD / CAM cannot be fully utilized-simplified processing technology, saving time and cost; (3) thicker porcelain decoration and The interface between zirconia-based porcelain will increase the scattering of light and further reduce the translucency of the restoration; (4) The interface state and mechanical compatibility between decorated porcelain and zirconia-based porcelain are poor, and porcelain chipping and delamination are prone to occur. Phenomenon in which the porcelain or porcelain layers are completely fractured, leading to failure of the restoration
However, there are no reports on the research, processing and application of complex color gradient translucent zirconia ceramics

Method used

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  • Dental complex color machinable zirconia ceramics and preparation method
  • Dental complex color machinable zirconia ceramics and preparation method
  • Dental complex color machinable zirconia ceramics and preparation method

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Embodiment Construction

[0022] Preparation of machinable zirconia ceramics with a main color of light yellow and five saturations, and dental CAD / CAM system for the production of full crown restorations of maxillary central incisors:

[0023] Raw materials of zirconia powder: white and yellow magenta zirconia powder, the main components are (wt%): Y 2 o 3 5.2±0.5, Al 2 o 3 0.1~0.4, and trace Na 2 O, SiO 2 , Fe 2 o 3 , the rest is ZrO 2 , the actual particle size is about 90nm.

[0024] Preparation of colored zirconia powder: white zirconia powder and yellow magenta zirconia powder are respectively: 60%: 40%, 70%: 30%, 80%: 20%, 90%: 10%, 95%: 5% were weighed and mixed, and the total mass of each mixed powder was 10 g; put it into a sealed tube, mark it as No. 1, 2, 3, 4, and 5 according to the above ratio, and mix well.

[0025] Preparation of multi-color machinable zirconia ceramic green body: according to the order of 1 to 5, weigh the colored zirconia mixed powder with an electronic balan...

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Abstract

A dental multi-color machinable zirconia ceramic and its preparation method. The zirconia ceramic has the characteristics of translucence and color gradient, and contains more than five porcelain layers with the same hue and different saturation. The lightness gradually decreases from the top of the ceramic to the bottom layer, and the saturation The density gradually increases, and the color transitions naturally with a sense of hierarchy; the pre-sintered porous ceramic body of the zirconia ceramic is easy to cut and shape, and can be used to make personalized and beautiful dental zirconia all-ceramic restorations through the CAD / CAM system, which is conducive to preserving the abutment teeth. Improve the repair success rate. The preparation method of the dental complex color machinable zirconia ceramic is simple, effective and easy to popularize.

Description

technical field [0001] The invention relates to dental zirconia ceramics, in particular to a dental complex color machinable zirconia ceramics and a preparation method thereof. Background technique [0002] Bioceramic materials have good aesthetic effects and biocompatibility, and are often used in the production of metal-ceramic restorations and all-ceramic restorations in the field of dental restoration. Metal-ceramic restorations effectively combine the strength of metal with the aesthetic effect of ceramics, but there are disadvantages such as metal corrosion in the oral environment, causing discoloration and inflammation of the gums, and poor light transmission of the metal base, which will affect the final aesthetic effect of the restoration. Therefore, metal-free all-ceramic restorations (all-ceramic veneers, inlays, onlays, all-ceramic crowns, etc.) are welcomed by more and more doctors and patients. [0003] The ceramic materials used to make all-ceramic restoratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622A61K6/027
Inventor 王新知王鸿娟赵静
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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