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Method for preparing zirconia ceramic denture

A technology of zirconia ceramics and dentures, which is applied in the direction of dentures, etc., can solve the problems of large grinding head wear, increased difficulty in denture processing, and high cost, and achieve product size correction, increased cost input, and high production efficiency.

Inactive Publication Date: 2017-07-25
DONGGUAN HUAJING POWDER METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, zirconia ceramics are the most promising materials for dentures due to their high strength, high hardness, and high toughness. The current method of making ceramic teeth is to build a CAD model through scanning information and then process it with a CNC machine tool. This method uses sintered Zirconia ceramics are directly ground into a model shape. Due to the high hardness of zirconia ceramics, the grinding process takes a long time and is difficult. Processing into complex tooth structures not only wastes a lot of materials, but also increases the difficulty of denture processing, resulting in high manufacturing costs of dentures

Method used

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0026] In one embodiment, a method of manufacturing a zirconia ceramic denture, comprising the steps of:

[0027] S1. Using a standard blank phantom, the zirconia ceramic feed material used to make the denture is injection molded into a standard green body that is larger than the denture to be manufactured;

[0028] S2. Pre-sintering the standard green body to obtain a pre-sintered body, removing at least part of the binder;

[0029] S3, processing the calcined billet into the shape of the denture to be manufactured, and the processed product size is the size of the denture to be manufactured in equal proportion;

[0030] S4. High-temperature sintering the processed product at a temperature higher than the pre-sintering temperature in step S2, so that...

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Abstract

The invention discloses a method for preparing a zirconia ceramic denture. The method comprises S1, injecting a zirconia ceramic feed for preparing a denture into a standard blank mold and carrying out molding to obtain a standard green blank bigger than the desired denture, S2, pre-sintering the standard green blank to obtain a presintered blank and discharging at least one part of a binder, S3, processing the presintered blank to obtain a denture shape having the size is magnified proportionally than the desired denture, S4, sintering the processed product at a high temperature higher than the presintering temperature in the step S2 so that the presintered blank is further compacted so that the presintered blank is shrunk to the size the same to that of the desired denture, and S5, grinding and polishing the compacted product to obtain a desired denture. The method reduces a denture production cost and improves a product yield.

Description

technical field [0001] The invention relates to a method for manufacturing zirconia ceramic dentures. Background technique [0002] In medical dentures, nickel-chromium porcelain teeth are widely used now, but nickel-chromium alloys will rust in long-term use, which will affect the appearance. Therefore, ceramic materials are mostly used to make dentures now. Ceramics are widely used because of their stable physical and chemical properties and good biocompatibility, and their color is closer to the natural color of teeth. Among them, zirconia ceramics are the most promising materials for dentures due to their high strength, high hardness, and high toughness. The current method of making ceramic teeth is to build a CAD model through scanning information and then process it with a CNC machine tool. This method uses sintered Zirconia ceramics are directly ground into a model shape. Due to the high hardness of zirconia ceramics, the grinding process takes a long time and is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/81A61C13/083
CPCC04B35/48A61C13/083C04B35/803C04B2235/3206C04B2235/3217C04B2235/3225C04B2235/5276C04B2235/6022C04B2235/608C04B2235/612
Inventor 周锐谢庆丰彭毅萍
Owner DONGGUAN HUAJING POWDER METALLURGY
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