Dyeing agent and accelerator for high-precision dyeing of zirconia porcelain blocks

Abstract

The invention discloses a dyeing agent for high-precision dyeing of zirconia porcelain blocks. The dyeing agent comprises the following components in percentages by weight: 1000 parts of deionized water, 10-50 parts of nitrate and 1-10 parts of hydrochloride. The invention relates to an accelerator for high-precision dyeing of the zirconia porcelain blocks. The accelerator mainly comprises water glass, wherein the effective components of the water glass are HSiO3- and H2SiO3, the water glass is easily adsorbed on the surface of zirconia to form a hydrophilic film, the hydrophilicity of the surface of the zirconia is improved, and the hydrophilic film is accelerated. The invention discloses the dyeing agent and the accelerator for high-precision dyeing of the zirconia porcelain blocks, andin the dyeing process, a sintered block is dissolved in water to form a paste colloid which is adsorbed on the zirconia and can accelerate combination of the zirconia and the dyeing agent; during processing of the zirconia porcelain blocks, the water glass as the accelerator can be in gradient change in different concentrations, thus, different layers of the zirconia absorb the dyeing agent differently, the absorption effects are different, and uniform color change can be shown under the condition that the time is sufficient.

Description

technical field [0001] The invention relates to the technical field of zirconia porcelain blocks, in particular to a dye and accelerator for high-precision dyeing of zirconia porcelain blocks. Background technique [0002] Currently, in prosthodontics, color and light transmission are an important indicator affecting the objectivity of restorations and teeth. The use of dental CAD / CAM technology to make all-ceramic restorations has opened up a new way for the automatic processing of restorations and the production of high-strength all-ceramic crowns and bridges. The color of uncolored zirconia porcelain blocks is mostly white to ivory. Although it can simulate the color of natural teeth to a certain extent, it cannot meet the clinical requirements for the color of restorations. Only by coloring zirconia and adjusting the color and light transmittance of zirconia to be close to the color and light transmittance of the tooth to be restored can the needs of customers be met. ...

AI Technical Summary

Problems solved by technology

However, the dip-dyeing process will lead to changes in some physical and chemical characteristics of the porcelain block body, and the physical properties such as the strength of the finished porcelain block will be greatly affected.

Therefore, there is still no reliable solution to the technical problem of making zirconia ceramic blocks with uniform gradient colors in the prior art.