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Sintering method of colored zirconia denture and colored zirconia denture

A sintering method and zirconia technology, applied in the field of stomatology, can solve the problems of density, toughness and uneven coloring, and achieve the effects of better aesthetics, improved density and reduced porosity

Active Publication Date: 2022-02-08
深圳市一诺牙科技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the above-mentioned prior art by providing a sintering method for colored zirconia dentures, which can effectively solve the problems of compactness, toughness and uneven coloring caused by the existing sintering process of colored zirconia dentures.

Method used

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  • Sintering method of colored zirconia denture and colored zirconia denture
  • Sintering method of colored zirconia denture and colored zirconia denture
  • Sintering method of colored zirconia denture and colored zirconia denture

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Embodiment 1

[0037] refer to Figure 1-2 A method for sintering colored zirconia dentures, comprising the following specific steps:

[0038] S1: Place a double-connected graphite sintering mold in the sintering furnace. The double-connected graphite sintering mold is provided with two identical sintering chambers, namely sintering chamber A and sintering chamber B, and the sintering chamber A and sintering chamber B are connected through air holes. Place the zirconia denture body in the sintering chamber A;

[0039] S2: After placing the zirconia denture body, use a vacuum pump to vacuumize the sintering chamber A, sintering chamber B and the inner chamber of the sintering furnace. After reaching the set vacuum degree, fill the sintering furnace with protective gas to normal pressure;

[0040] S3: After repeating step S2 for 3 to 5 times, the sintering chamber A and the sintering chamber B are respectively closed by the graphite piston;

[0041] S4: Apply a constant pre-pressure to the z...

Embodiment 2

[0052] refer to Figure 1-2 A method for sintering colored zirconia dentures, comprising the following specific steps:

[0053] S1: Place a double-connected graphite sintering mold in the sintering furnace. The double-connected graphite sintering mold is provided with two identical sintering chambers, namely sintering chamber A and sintering chamber B, and the sintering chamber A and sintering chamber B are connected through air holes. Place the zirconia denture body in the sintering chamber A;

[0054] S2: After placing the zirconia denture body, use a vacuum pump to vacuumize the sintering chamber A, sintering chamber B and the inner chamber of the sintering furnace. After reaching the set vacuum degree, fill the sintering furnace with protective gas to normal pressure;

[0055] S3: After repeating step S2 for 3 to 5 times, the sintering chamber A and the sintering chamber B are respectively closed by the graphite piston;

[0056]S4: Apply a constant pre-pressure to the zi...

Embodiment 3

[0067] refer to Figure 1-2 A method for sintering colored zirconia dentures, comprising the following specific steps:

[0068] S1: Place a double-connected graphite sintering mold in the sintering furnace. The double-connected graphite sintering mold is provided with two identical sintering chambers, namely sintering chamber A and sintering chamber B, and the sintering chamber A and sintering chamber B are connected through air holes. Place the zirconia denture body in the sintering chamber A;

[0069] S2: After placing the zirconia denture body, use a vacuum pump to vacuumize the sintering chamber A, sintering chamber B and the inner chamber of the sintering furnace. After reaching the set vacuum degree, fill the sintering furnace with protective gas to normal pressure;

[0070] S3: After repeating step S2 for 3 to 5 times, the sintering chamber A and the sintering chamber B are respectively closed by the graphite piston;

[0071] S4: Apply a constant pre-pressure to the z...

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Abstract

The invention relates to the technical field of stomatology and discloses a sintering method for colored zirconia dentures. It includes the following steps, S1: placing the denture body in the sintering cavity; S2: filling the sintering furnace with protective gas; S3: closing the sintering cavity; S4: applying a constant pre-pressure; S5: keeping warm for the first time; S6: Continue to heat up until the inner cavity temperature of the sintering furnace is 1350°C; S7: second heat preservation; S8: during the process of applying oscillating pressure, carry out the third heat preservation; S9: cool down the sintering furnace; S10: release the pressure and cool naturally to room temperature. The colored zirconia denture sintering method provided by the present invention provides an oscillating pressure process during the sintering process of ceramic dentures, which can quickly transfer local high heat to the inner particle center of the material, so that the density of the sintered zirconia denture reaches 99.2 %, because it can reduce the sintering temperature and reduce the volatilization of colorants at high temperatures, so that the colored zirconia dentures are more uniform in color.

Description

technical field [0001] The patent of the present invention relates to the technical field of stomatology, in particular, to a sintering method for colored zirconia dentures. Background technique [0002] In the field of oral restoration, removable dentures are widely used restoration products. Generally, cobalt-chromium alloy and titanium alloy stents are used, and new ceramic composite materials such as polyether ether ketone are also emerging. Zirconia all-ceramic dentures are the most widely used restoration dentures. At present, the method of preparing colored zirconia ceramic dentures is mainly through solid-phase mechanical mixing methods, such as ball milling, stirring, kneading and other techniques, to mix colorants with ceramic powders. , after forming and sintering. [0003] The shortcoming of prior art is to adopt hot pressing sintering or isostatic pressing sintering, and the porosity of ceramic denture, compactness and fracture toughness all exist deficiency; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/645A61K6/818A61K6/78A61K6/70
CPCC04B35/48C04B35/622C04B35/6455A61K6/818A61K6/78A61K6/70C04B2235/6562C04B2235/6567C04B2235/661C04B2235/9661C04B2235/77C04B2235/785
Inventor 郭科宏
Owner 深圳市一诺牙科技术有限公司