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Bionic enamel zirconia ceramic material block, dental prosthesis and preparation method

A technology of zirconia ceramics and bionic teeth, applied in dental preparations, dental prostheses, dentistry, etc., can solve problems such as excessive wear of jaws and teeth, achieve the effects of reducing stress, improving user experience, and prolonging service life

Pending Publication Date: 2021-05-07
PEKING UNIV SCHOOL OF STOMATOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present disclosure is to provide a bionic enamel zirconia ceramic material block, a dental restoration and a preparation method, at least to a certain extent, to overcome the excessive wear of the opposing teeth caused by the single-layer full zirconia dental restoration in the related art The problem

Method used

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  • Bionic enamel zirconia ceramic material block, dental prosthesis and preparation method
  • Bionic enamel zirconia ceramic material block, dental prosthesis and preparation method
  • Bionic enamel zirconia ceramic material block, dental prosthesis and preparation method

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preparation example Construction

[0099] Such as figure 2 As shown, the preparation method of the bionic enamel zirconia ceramic material block according to the embodiment of the present disclosure includes:

[0100] Step S202, processing the zirconia nanocrystals to obtain zirconia ceramic powder including a stabilizer.

[0101] In the above examples, the processing of zirconia nanocrystals includes three steps of hydrothermal reaction, hydrolysis reaction and powder acquisition:

[0102] (1) Hydrothermal reaction

[0103] Prepare a mixed aqueous solution of zirconium oxychloride and carbonamide with a certain volume and concentration to form [Zr 4+ ]=0.4mol / L, [CO(NH 2 ) 2 ]=1mol / L reaction liquid. The reaction feed liquid is placed in a polytetrafluoroethylene-lined hydrothermal synthesis reactor, and reacted at a temperature of 150°C±10°C for 3 hours to form a gel.

[0104] (2) Hydrolysis reaction

[0105] Take out the gel obtained after the hydrothermal reaction, add a certain amount of the origin...

Embodiment 1

[0147] A method for preparing a bionic enamel zirconia ceramic material block of the present disclosure has the following steps:

[0148] (1) Design a zirconia material block composed of a three-layer material of a functional wear layer, a stress buffer layer and a flexural base layer.

[0149] (2) The zirconia ceramic powders used for the functional wear layer, the stress buffer layer and the anti-bending base layer are prepared respectively by hydrothermal method; wherein, the functional wear layer is 10mol% cerium oxide, and the anti-bending base layer is 3mol% cerium oxide Yttrium, the stress buffer layer is 10 mol% cerium oxide and 3 mol% yttrium oxide.

[0150] (3) layered pressing material block / disc by isostatic pressing method, wherein the thickness of the functional wear layer is 0.3mm, the thickness of the stress buffer layer is 0.1mm, and the thickness of the anti-bending base layer is 0.5mm; the material block / The three-layer structure of the disc is from top to...

Embodiment 2

[0152] A method for preparing a bionic enamel zirconia ceramic material block of the present disclosure has the following steps:

[0153] (1) Design a zirconia material block composed of a three-layer material of a functional wear layer, a stress buffer layer and a flexural base layer.

[0154] (2) The zirconia ceramic powders for the three layers of functional wear layer, stress buffer layer and anti-fracture base layer were prepared respectively by hydrothermal method. Wherein, the functional wear layer is 8 mol% magnesia, the anti-bending base layer is 5 mol% yttrium oxide, and the stress buffer layer is 12 mol% cerium oxide and 10 mol% magnesia.

[0155] (3) The material block / disk is laminated and pressed by isostatic pressing, wherein the thickness of the functional wear layer is 0.4 mm, the thickness of the stress buffer layer is 0.18 mm, and the thickness of the anti-folding base layer is 1.2 mm. The three-layer structure of the material block / disk is respectively fro...

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Abstract

The invention relates to a bionic enamel zirconia ceramic material block, a dental prosthesis and a preparation method. The bionic enamel zirconia ceramic material block comprises a functional wearing layer; the functional wearing layer comprises zirconia and a stabilizer used for stabilizing the zirconia; the zirconia is formed by zirconia nano crystallites; intragranular defects are formed in the nano crystallites; the outer surface of the functional wearing layer is used for forming an occlusal surface; and the functional wearing layer is used for simulating the straight enamel rod layer of natural tooth enamel. According to the technical scheme disclosed by the invention, the situation that the dental prosthesis excessively abrades jaw teeth can be relieved; the obtained zirconia ceramic material block has the advantages of high strength, low hardness and low elastic modulus; the probability of breaking of the bionic enamel zirconia ceramic material block and the dental prosthesis is reduced; the service lives of the tooth prosthesis and the jaw teeth are prolonged; in addition, the appearance of the bionic enamel zirconia ceramic material block and the appearance of the dental prosthesis are very similar to the appearance of natural teeth; and the bionic enamel zirconia ceramic material block and the dental prosthesis have excellent light transmission, transparency and polishing degree.

Description

technical field [0001] The present disclosure relates to the technical field of dental restorations, in particular, to a bionic enamel zirconia ceramic material block, a method for preparing a bionic enamel zirconia ceramic material block, and a bionic enamel zirconia ceramic material block. A restoration preparation method and a dental restoration of a bionic enamel zirconia ceramic material. Background technique [0002] When people chew, the upper and lower teeth will form a pair of special wear pairs, that is, tooth wear pairs. Under the control of the central nervous system, the masticatory muscles are used as the driving force, and the occlusion is the program, and the chewing cycle is repeated, with an average of 900-1000 times per meal, and the complex chewing function is completed. The contact mode of the upper and lower teeth is mainly friction and collision, and the corresponding wear types are abrasive wear and fatigue wear. The two wear modes occur alternately,...

Claims

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Application Information

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IPC IPC(8): A61K6/818A61K6/17A61K6/71A61K6/15C04B35/48C04B35/622
CPCA61K6/15A61K6/17A61K6/71A61K6/818C04B35/48C04B35/622C04B2235/3225C04B2235/3229C04B2235/96
Inventor 孙玉春周永胜王勇李洪文李伟伟陈虎刘云松张磊翟文茹
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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