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High-toughness zirconia ceramic block and preparation method thereof

A zirconia and porcelain block technology, applied in the field of high-toughness zirconia ceramic blocks, can solve problems such as rework, inability to meet consumers' aesthetic needs for dentures, and unsatisfactory improvement effects.

Active Publication Date: 2019-09-17
CHENGDU BESMILE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After market feedback, it is found that the existing ST products for all-ceramic dentures on the market have a common defect: during the preparation of dentures by denture processing factories, long bridge breaks, thin teeth and edge collapse are prone to occur, resulting in rework
[0004] Although there are some methods to improve the toughness of zirconia ceramic blocks in the prior art, such as adding stabilizers, these methods either have unsatisfactory improvement effects, or sacrifice the semi-permeability of zirconia ceramic blocks. Unable to meet the aesthetic needs of consumers for dentures

Method used

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  • High-toughness zirconia ceramic block and preparation method thereof
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  • High-toughness zirconia ceramic block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Two, the preparation method of the zirconia porcelain block that the present invention relates to

[0028] In the case of not adding a titanium nitride protective film, the preparation method of the zirconia ceramic block is: weighing each component except titanium nitride, mixing, pre-pressing and forming, and then isostatic pressing, Then pre-sintering and high-temperature sintering are carried out to complete the preparation.

[0029] If it is necessary to add a titanium nitride protective film, the specific preparation method is as follows:

[0030] (1) After the pre-sintering is completed, the zirconia ceramic block is taken out, machined to the desired shape and size, and then the zirconia ceramic block is ultrasonically cleaned and dried with acetone and alcohol in sequence.

[0031] (2) Sputtering the cleaned zirconia ceramic block with a low-energy ion beam.

[0032] (3) In a vacuum environment and an Ar atmosphere, Ti particles with a purity of 99.99% are us...

Embodiment 1

[0035] Example 1: Performance demonstration of zirconia ceramic block without titanium nitride coating

[0036] 1. Prepare 39 groups of zirconia ceramic blocks according to the above formula and method, with 20 repetitions for each group. The specific formulations of each group of zirconia ceramic blocks are shown in Table 1. The values ​​in the table are all mass fractions, and the balance is all zirconia powder. The ST zirconia block purchased from Changsha Pengdeng Bio-porcelain Block Co., Ltd. was used as the control group. It should be noted that the applicant did not only conduct the experiments in Table 1, but because of space limitations, only selected the most representative sets of data for display.

[0037] The specific preparation method of each group of zirconia ceramic blocks is as follows: weigh each component, mix well, hold the pressure at 150MPa for 10 minutes, and carry out isostatic pressing; then hold the temperature at 1050°C for 2 hours, and carry out p...

Embodiment 2

[0046] Example 2: Performance demonstration of zirconia ceramic block with titanium nitride added

[0047] 1. Select the formula of Group 19 in Example 1 to prepare 20 groups of zirconia ceramic blocks: after pre-sintering according to the method of Example 1, take out 10 groups of zirconia ceramic blocks, machine them to the desired shape and size of the denture, and another 10 groups Group is not machined. Subsequently, each group of zirconia ceramic blocks was sequentially immersed in acetone and absolute alcohol, ultrasonically cleaned and dried.

[0048] 2. Use a low-energy ion beam to perform sputter cleaning on each group of zirconia ceramic blocks after cleaning. The specific sputtering cleaning conditions are as follows: the zirconia ceramic block is sputtered for 5 minutes with a low-energy ion beam of 300eV and 50mA.

[0049] 3. Use an electron beam evaporation coating machine to perform Ti coating on the sputtered zirconia ceramic block. Control the vacuum degre...

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Abstract

The invention belongs to the field of biological materials, and particularly relates to a high-toughness zirconia ceramic block and a preparation method thereof. According to the specific technical scheme, the zirconia ceramic block comprises the following components in percentage by mass: 0-3% of lanthanum oxide, 1.5-12% of yttrium oxide, 0-2.5% of silicon carbide nano-whiskers and the balance of zirconia. A titanium nitride thin film is further deposited on the surface of the zirconia ceramic block in situ. The zirconia ceramic block obtained by using the formula and method provided by the invention is high in fracture toughness and excellent in semi-permeability, and is an ideal biological ceramic material for oral cavities.

Description

technical field [0001] The invention belongs to the field of biological materials, and in particular relates to a high-toughness zirconia porcelain block. Background technique [0002] Zirconia ceramic block is a kind of bioceramic material, which belongs to the category of green economy. According to the classification of medical device registration methods, zirconia ceramic blocks for all-ceramic dentures belong to the second class of medical devices. Ideal denture restoration material. With the improvement of people's living standards and the enhancement of health awareness, demetallization of oral denture restoration has become a development trend, and all-ceramic restoration has been praised by more and more doctors and patients. [0003] The fracture toughness of the most widely used and best-performing zirconia denture products on the market is 4.6MPa·m 1 / 2 ~5.2MPa·m 1 / 2 (ST products), ST products have the advantages of good performance, high strength, and moistne...

Claims

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Application Information

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IPC IPC(8): C04B35/81C04B41/87
CPCC04B35/803C04B41/009C04B41/5068C04B41/87C04B2235/3225C04B2235/3227C04B2235/3826C04B2235/5276C04B2235/96C04B2235/9646C04B41/4558
Inventor 罗友明鄢新章刘谋山马勤冯崇敬
Owner CHENGDU BESMILE BIOTECH
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