Dental complex color machinable zirconia ceramics and preparation method

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...

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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

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