Dental glass-ceramic with adjustable color and performance and preparation method thereof

Abstract

The invention discloses a novel dental glass ceramic with adjustable color and performance and a preparation method thereof. Wollastonite glass ceramic frit powder and apatite glass ceramic frit powder, which have the same glass matrix, are mixed, then the mixture is mixed with a yellow pigment, and sintering is conducted to obtain the novel dental glass ceramic. According to the invention, if the color and performance of the novel dental glass ceramic need to be changed, by change of the mixing ratio of the frits in the mixed powder to the pigment, glass ceramics with different colors and performances can be prepared, without preparing glass ceramic frits and the yellow pigment again; the restricting factors of the preparation process are few; the preparation process is high in controllability and operability; therefore, the preparation method is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the field of inorganic material processing, and relates to a novel dental glass-ceramic with adjustable color and mechanical properties, in particular to a single wollastonite (A, apatite) and single apatite ( W, wollastonite) crystal phase glass-ceramic frit, mixed with yellow pigment and prepared by sintering method, has wollastonite-apatite composite crystal phase, color gradient change, adjustable performance, and can be used A glass-ceramic for medical use in teeth and a preparation method thereof. Background technique [0002] Glass-ceramics is used as a tooth restoration material because of its good mechanical strength, chemical stability, and biocompatibility, and it is playing an increasingly important role in clinical medicine. [0003] "Journal of Liaoning University (Natural Science Edition)" in the third issue of 2006 Yang Donghui published an article "Application of glass-ceramics in tooth restoration materials",...

AI Technical Summary

Problems solved by technology

Although this technology overcomes the defects in the preparation of AW bioactive glass-ceramics by the fusion method, because the wollastonite and apatite crystal phases are prepared in the same formula and at the same time during preparation; the defects that result: a. The performance of the final product is poorly controllable. Once the performance of the product does not meet the requirements, it needs to be re-prepared, and the risk is high; the second is that the process requirements are relatively strict. If the distribution ratio of a certain group needs to be adjusted, the ratio of the entire system must be adjusted. , affect the whole body, which is not conducive to the promotion and application of industrialization; the third is: when using this method to prepare glass-ceramic for teeth, the mechanical properties of the final product cannot be adjusted in time, and there is no color, so it cannot be used by different groups of people.

Although this technology can prepare dental glass-ceramics of different colors, it also has the following defects: because the molded body is formed by pressing or bonding a plurality of intermediate molded bodies of different colors, and then sintered, the technology exists. The following defects: one, when used as a dental restoration material, because everyone's teeth are different in color, even the teeth of the same person also have color differences, which leads to the need to prepare an indefinite number of intermediate moldings in advance, and then multiple The moldings are arranged and formed according to the required gradient changes, and the process is complicated. In reality, it is difficult to be used as a dental restoration material. Second, the interface between each intermediate molding is a weak link, and the compatibility of the two materials at the interface is poor. , resulting in a performance gradient change at the interface of the final molded body, just like a broken bowl, which is bonded together by an adhesive and sintered and made into a whole before sintering, and the performance of the final product is not uniform

[0008] The present invention proposes an AW dental glass-ceramics with controllable content of apatite and wollastonite crystal phases and gradient color change, which is a glass-ceramics using single wollastonite and single apatite as crystal phases respectively The frit is mixed, and then mixed with the yellow pigment. According to the required ratio, it is prepared by sintering after mixing. It has a wollastonite-apatite composite crystal phase; after searching, there is no such composite material in China at present. Patents and paper reports

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