Material for repairing lithium-based ceramic oral cavity and preparation thereof

Abstract

The invention belongs to the field of inorganic non-metal materials and the preparation technology thereof, particularly relates to a lithium base cast porcelain oral repair material and the preparation method thereof. The chemical composition ingredients of the material are as follows (weight percent): 17-24 percent of Li2O, 10-15 percent of Al2O3, 55-65 percent of SiO2, 4-6 percent of K2O, 0.5-3 percent of Na2O, 0.5-4 percent of ZrO2 and 0.5-3 percent of colorant oxide, wherein, the mol ratio between the SiO2 and the Li2O is 1.2 to 1.8:1, the colorant oxide is one or more than one of Fe2O3, MnO2 and CeO2. The preparation method of the cast porcelain oral repair material includes the following steps of material preparing, founding, water quenching, crashing, sponging drying, molding and sintering. Compared with the prior art, the invention has the advantages of low cost, high size precision, good product repetitiveness, stable product quality, fine mechanical combination property and suitability to commercial process.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials and their preparation, and in particular relates to a lithium-based cast porcelain oral restorative material and a preparation method thereof. Background technique [0002] Cast porcelain is cast glass ceramics, and its essence is glass-ceramics. This kind of cast glass-ceramic restoration uses the castability of glass, and uses the glass frit to obtain the prototype of the required restoration by the lost-wax casting method, and then the glass body is subjected to crystallization heat treatment (that is, porcelain, within a certain temperature range). Make crystal nuclei appear in the inner part of the glass, and further grow and crystallize, and finally make part or all of the glass phase of the product transform into a crystalline phase) to form a ceramic-like restoration. The composition of glass ceramics is similar to that of ordinary ceramics, and has certain charac...

AI Technical Summary

Problems solved by technology

However, because the products of Ivoclar Vivadent and Vita are expensive, the current repair price is about 3,000 yuan per tooth, and the above two companies tend to join hands to monopolize and control the domestic market

At present, the clinical application is mainly based on the products of Ivoclar Vivadent, accounting for about 90%, and its product composition is SiO 2 (57.0~80.0)%, Li 2 O(11.0~19.0)%, P 2 o 5 (0.0~11.0)%, ZnO (0.0~8.0)%, other oxides (0.0~33.0)%, colorant (0.0~8.0)%, which is characterized by high strength and stable performance, but expensive

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