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Strength and color uniform transition dentistry zirconium oxide repairing material and preparing method thereof

A technology for repairing materials and uniform color, applied in dental preparations, dentistry, dental prosthesis, etc., can solve problems such as jaw and tooth damage, achieve high neck strength and reduce wear and tear

Active Publication Date: 2017-09-19
AIDITE (QINHUANGDAO) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the color and transparency of zirconia are basically studied. Although the aesthetic performance of zirconia dental restoration materials has been improved, the impact of zirconia dental restorations on adjacent teeth during chewing is ignored. and damage to the opposing teeth

Method used

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  • Strength and color uniform transition dentistry zirconium oxide repairing material and preparing method thereof
  • Strength and color uniform transition dentistry zirconium oxide repairing material and preparing method thereof
  • Strength and color uniform transition dentistry zirconium oxide repairing material and preparing method thereof

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preparation example Construction

[0019] The invention provides a preparation method of dental zirconia repair material with uniform transition in strength and color, comprising the following steps:

[0020] (1) Pour the colored zirconia powder into the dry pressing mold in the order of the intensity of each layer from high to low and the color from dark to light;

[0021] (2) Cold isostatic pressing is carried out after dry pressing;

[0022] (3) pre-sintering after cold isostatic pressing to obtain a blank;

[0023] (4) CAD / CAM (Computer Aided Design / Computer Aided Manufacturing) is used to cut the raw embryo, and finally, final sintering is performed to obtain a dental zirconia repair material.

[0024] The invention can not only meet the clinical requirements for the color of the zirconia restoration, but also the strength from the neck to the incisal end is gradually reduced, which can greatly reduce the damage to the adjacent teeth and the opposite teeth during the chewing movement, so that the zirconia...

Embodiment 1

[0046] A method for preparing a dental zirconia restorative material with uniform strength and color transition, comprising the following steps:

[0047] (1) Pour the colored zirconia powder into the dry pressing mold in the order of strength from high to low and color from dark to light for each layer, and dry press molding. The dry pressing molding pressure is 10MPa, and the pressing time is 15s;

[0048] (2) After dry pressing, cold isostatic pressing is carried out, the pressure of cold isostatic pressing is 180MPa, and the pressure is maintained for 150s;

[0049] (3) Pre-sintering is carried out after cold isostatic pressing to obtain a plain embryo. The pre-sintering temperature is 1000°C and the time is 150 minutes;

[0050] (4) CAD / CAM cutting is used for the plain blank, and final sintering is carried out in the final process to obtain dental zirconia restorative materials. The final sintering temperature is 1530° C. and the time is 120 minutes.

Embodiment 2

[0052] A method for preparing a dental zirconia restorative material with uniform strength and color transition, comprising the following steps:

[0053] (1) Pour the colored zirconia powder into the dry pressing mold in order of strength from high to low and color from dark to light for each layer, and dry press molding. The dry pressing molding pressure is 15MPa, and the pressing time is 5s;

[0054] (2) After dry pressing, cold isostatic pressing is carried out, the pressure of cold isostatic pressing is 270MPa, and the pressure is maintained for 60s;

[0055] (3) Pre-sintering is carried out after cold isostatic pressing to obtain a plain embryo. The pre-sintering temperature is 800°C and the time is 180 minutes;

[0056] (4) CAD / CAM cutting is used for the plain blank, and final sintering is carried out in the final process to obtain dental zirconia restorative materials. The final sintering temperature is 1450° C. and the time is 60 minutes.

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Abstract

The invention discloses a strength and color uniform transition dentistry zirconium oxide repairing material and a preparing method thereof. The preparing method comprises the following steps that firstly, coloring zirconium oxide powder is poured into a dry pressure die to be subjected to dry pressure forming according to the each-layer strength sequence from high to low and the color sequence from deep to shallow; secondly, after dry pressure forming, cold isostatic compaction is conducted; thirdly, after cold isostatic compaction, pre-sintering is conducted, and a raw blank is obtained; and fourthly, the raw blank is cut through CAD / CAM, finally, final sintering is conducted, and the dentistry zirconium oxide repairing material is obtained. The strength and color uniform transition dentistry zirconium oxide repairing material is formed through layering pressing of various coloring zirconium oxide powder different in strength; and the strength of a repairing body can be gradually increased from the cut end to the neck part, abrasion to adjacent teeth and jaw teeth is reduced, the strength of the neck part is high, and long bridge repairing can be conducted.

Description

technical field [0001] The present disclosure generally relates to the field of dentistry, and in particular relates to a dental zirconia restoration material with uniform transition of strength and color and a preparation method thereof. Background technique [0002] Ceramic materials have become one of the main materials to replace the hard tissue of natural teeth due to their excellent simulated aesthetic effects and biocompatibility. Among them, zirconia ceramics are currently the most popular choice. With the improvement of the preparation process of dental zirconia materials, its Transparency, color and other properties have reached the aesthetic needs. However, due to the great difference between the basic mechanical parameters of zirconia and natural teeth, especially the hardness and elastic modulus are significantly greater than those of enamel, zirconia ceramic restorations are different from natural teeth. During the process of chewing, friction and wear occur, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B28B1/29B28B3/00B28B11/14B28B11/24C04B35/48C04B35/622
CPCB28B1/00B28B1/29B28B3/003B28B11/14B28B11/243C04B35/48C04B35/622C04B2235/9661C04B2235/60A61C13/0022A61C13/0003C04B35/486C04B2235/61C04B2235/6567C04B2235/75C04B2235/96A61C13/083C04B2235/612C04B2235/661A61K6/818C04B35/645C04B2235/3244
Inventor 李洪文吴海艳陈莹莹
Owner AIDITE (QINHUANGDAO) TECH CO LTD
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