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Dental colored zirconia ceramic material and its preparation method

A technology for zirconia ceramics and dentistry, which is applied in the field of colored zirconia ceramics for dentistry and its preparation, and can solve problems such as many influencing factors, different dyeing results, and uneven dyeing

Inactive Publication Date: 2014-04-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is fast and easy to operate, there are many influencing factors, which can easily cause uneven dyeing. For example, ceramics from different companies have different microstructures such as porosity, resulting in different dyeing results under the same conditions or different dyeing times. Are not the same

Method used

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  • Dental colored zirconia ceramic material and its preparation method
  • Dental colored zirconia ceramic material and its preparation method
  • Dental colored zirconia ceramic material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a preparation method of colored zirconia ceramics for dental use

[0032] (1) Zirconia raw material is 3Y-TZP, Pr 6 o 11 、Er 2 o 3 It is a coloring agent, and its specific components are shown in Table 1;

[0033] (2) Put all the raw materials into the ball milling tank, and perform ball milling with the ratio of raw materials: absolute ethanol: zirconia ball milling beads = 1:1:1, the ball milling speed is 300r / min, and the ball milling time is 12-24h; after ball milling Dry the powder in a constant temperature drying oven at 50-70°C for 12-24 hours; add 3wt% PVA to the dried powder for grinding, and the amount of polyvinyl alcohol added is 0.4-1ml / g powder Then pass through a 50-mesh sieve for granulation; dry-press the granulated powder at a pressure of 4 MPa and hold the pressure for 2 minutes; then perform cold isostatic pressing and hold the pressure at 200 MPa for 3 minutes;

[0034] (3) Heat the molded ceramic block at a heating rate of 50°C / h...

Embodiment 2

[0036] Embodiment 2, a preparation method of colored zirconia ceramics for dental use

[0037] (1) Zirconia raw material is 3Y-TZP, Pr 6 o 11 、Er 2 o 3 It is a coloring agent, and its specific components are shown in Table 1;

[0038] (2) Same as step (2) of Example 1;

[0039] (3) Same as step (3) of Example 1 to obtain colored zirconia ceramics.

[0040] The XRD spectrum, SEM figure and chromaticity value of the colored zirconia ceramics are as follows figure 1 , 2 , 3 shown.

Embodiment 3

[0041] Embodiment 3, a preparation method of colored zirconia ceramics for dental use

[0042] (1) Zirconia raw material is 3Y-TZP, Pr 6 o 11 、Er 2 o 3 It is a coloring agent, and its specific components are shown in Table 1;

[0043] (2) Same as step (2) of Example 1;

[0044] (3) Same as step (3) of Example 1 to obtain colored zirconia ceramics.

[0045] The XRD spectrum and chromaticity values ​​of the colored zirconia ceramics are as follows: figure 1 and image 3 shown.

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PUM

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Abstract

The invention discloses a dental colored zirconia ceramic material and its preparation method. The method comprises the steps of: (1) weighing ZrO2, Pr6O11 and Er2O3, employing a ball mill to conduct ball milling and drying; (2) adding a high polymer binder into the dried powder to perform granulation; (3) subjecting the granulated powder to dry-pressing molding; (4) conducting isostatic cool pressing on a molded ceramic block; and (5) sintering the ceramic block subjected to isostatic cool pressing, thus obtaining the dental colored zirconia ceramics. The dental colored zirconia ceramics provided by the invention have a color close to that of natural teeth, its chromatic value distribution can cover an entire shade guide, and the color stability is good.

Description

technical field [0001] The invention relates to zirconia ceramics, in particular to a colored zirconia ceramics for dental use and a preparation method thereof. Background technique [0002] Before the 1950s, metal materials have always been the main body of oral restoration materials. It was not until the advent of ceramic materials that can be fused to metal surfaces that ceramic materials began to be clinically used in oral restorative materials. Compared with other oral restorative materials, ceramic materials have gradually become a biomaterial with broad application prospects due to their good mechanical properties, chemical stability, biocompatibility and aesthetics. Among the numerous ceramic materials, tetragonal zirconia ceramics stand out among dental restorative materials due to their excellent performance, and become a research hotspot at home and abroad. [0003] However, pure zirconia ceramics are single white, which has a certain gap with the color of natur...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 林元华李静刘诗铭沈洋南策文
Owner TSINGHUA UNIV
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