Dyeing liquor for dental ceramics

Abstract

The invention provides dyeing liquor for dental ceramics. The dyeing liquor for dental ceramics comprises a solvent, a coloring agent and an organic addition agent. Compared with the conventional dyeing liquor in the prior art, the dyeing liquor for dental ceramics, provided by the invention, has the characteristics as follows: (1), the dyeing liquor self needs to be stabilized, is harmless to human bodies or causes less damage; (2), the depth of penetration of the dyeing liquor to dental ceramics needs to be sufficient, and the depth of dyeing penetration to pre-sintering green bodies needs to be greater than 5mm; (3), the dyeing liquor needs to be uniform in dyeing the dental ceramics in the surface or in the direction perpendicular to the surface, that is, the dental ceramics, after being subjected to localized grinding or finishing at different parts with different grinding amounts, can still be uniform in color; (4), at the same time, inorganic ions are added to the dyeing liquor, so that an optical effect of the dental ceramics is obviously improved, and a sense of quality similar to that of natural teeth is achieved.

Description

technical field [0001] The invention relates to a ceramic staining solution, in particular to a dental ceramic staining solution with super strong penetrability, and belongs to the field of inorganic chemistry. Background technique [0002] 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. As the most important dental all-ceramic crown material, zirconia is mostly ivory white to ivory-colored after sintering. Although it has a certain degree of translucency, it cannot meet the clinical requirements for the color of the restoration. In order to meet the actual needs of clinical denture restoration, it is often necessary to color the all-ceramic base crown to make it lose part of its transparency, and adjust the color of zirconia itself to be consistent with the chroma, lightness and saturation of the tooth to be restored,...

AI Technical Summary

Problems solved by technology

In addition, when a variety of coloring ions are matched, due to the inconsistent penetration depth of different ions, there will be color differences in the direction perpendicular to the surface after the ceramics are made into porcelain. , there will be a difference in color, resulting in uneven color

At the same time, the above-mentioned prior art can adjust the color by adding different coloring substances in the staining solution, but it has no anti-reflection effect, so the texture of the dental ceramics after sintering is poor

[0010] The dyeing solution has a shallow penetration depth on the pre-sintered ceramic body and the color is uneven along the direction vertical to the surface. The reason is that ① the surface tension of the dyeing solution is not suitable, and its wetting effect on the surface / interface of dental ceramics is poor; ② soaking in the dyeing solution When infiltrating or brushing infiltrates, there are unsaturated groups on the surface interface of dental ceramics or Lewis acidity and alkalinity. During the infiltration and coloring process of dental pre-sintered green bodies, the accumulation of coloring ions in the pore structure will hinder the further penetration of coloring ions. At the same time, the enrichment degree of different coloring ions is different, resulting in the difference in the concentration of coloring ion diffusion, which leads to the difference in the penetration depth of different coloring ions, and finally leads to the shallow penetration of the dyeing solution on the pre-sintered ceramic body and the uneven coloring along the vertical direction of the ceramic surface. question

The above patents only focus on the stability of the dyeing solution, the uniformity of coloring on the ceramic surface, and the difficulty in flowing after the dyeing solution is adsorbed on the surface of the pre-sintered ceramics.

Only CN101778807A describes the use of organic dyes to test the penetration depth of 5mm. According to the analysis of this patent, the penetration depth only represents the penetration depth of organic dyes, and cannot represent the penetration depth of colorants.

The depth of the staining solution penetrating into the pre-sintered ceramic body after soaking or brushing, and the color uniformity perpendicular to the surface are not involved. At the same time, the light transmission performance of the zirconia dental restoration is adjusted by adding inorganic substances in the staining solution , so as to obtain the same texture as natural teeth, there is no relevant patent mention

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