Zirconium oxide full-porcelain dental repair material and its preparing method

Abstract

The present invention belongs to a ceramic material and its preparation field. In the particular, it relates to a zirconia full-porcelain dental repairing material and its preparation method. Its raw material composition contains (by wt%) 86-92% of tetragonal-phase zirconia stabilized by 3.0-5.15% of yttrium oxide, 5-10% of flux and 3-4% of adhesive, in which the flux is one kind of boron-aluminum-silicon system glass, hydroxyapatite and beta-stellite or more than one kind of them, and the adhesive is one or more than one kind of polyvinyl alcohol, carboxyl methyl cellulose and polyacrylic acid. Its preparation method includes the following steps: mixing raw materials, garanulating, cold isostatic compaction, moulding and sintering.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials and their preparation, and in particular relates to a zirconia all-ceramic dental restorative material and a preparation method thereof. Background technique [0002] The ceramic materials commonly used for restoration in clinical dentistry mainly include metal-ceramic teeth and all-ceramic teeth. [0003] Because metal porcelain teeth have the advantages of high metal strength, durability, good edge adhesion, beautiful porcelain color, good corrosion resistance, and strong self-cleaning effect, they are very popular among dentists and patients, and are widely used in developed countries. very common. However, there are still many problems to be solved for gold-ceramic restorations, such as: the enamel component is cut too much, requiring a metal casting system; In addition, non-precious metals also have corrosion problems and are harmful to the human body. Currently, Ni-Cr alloys and ...

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Problems solved by technology

However, the yttria-stabilized tetragonal zirconia materials currently prepared in China still have the disadvantages of difficult control of dimensional accuracy and low comprehensive mechanical properties, such as (1) Chinese patent with publication number CN1489988 and publication date: 2004.04.21: low cost A machinable zirconia ceramic dental restoration and a preparation method thereof, the prepared zirconia ceramics have a bending strength of 340-360MPa and a fracture toughness of 2.7-3.MPa·m 1 / 2 (2) Publication number: CN1489987, publication date: 2004.04.21 Chinese patent: polycrystalline zirconia ceramic tooth post material and its preparation method, the prepared zirconia ceramic tooth post material has a bending strength of 600MPa

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