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Zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method

A technology of gel injection molding and dental ceramics, applied in dentistry, dental prosthesis, medical science, etc., can solve the problems of unsatisfactory promotion, complicated equipment, high technical requirements, etc., achieve good reinforcement and toughness, and small change in sintered volume , Easy and fast operation

Inactive Publication Date: 2009-11-18
温州医科大学附属口腔医院
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Problems solved by technology

In order to make ceramic-based crowns with better sintering properties, there are various molding technologies such as ultra-high pressure molding, inkjet molding, ceramic moldless molding, and gel direct molding, but these methods require complex equipment and high technical requirements. The promotion of clinical use in dentistry is not ideal

Method used

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Embodiment

[0016] Ceramic slurry must be used when making the inner core of an all-ceramic crown. Generally, the ceramic slurry is prefabricated and ready for use. The steps for preparing the slurry are as follows:

[0017] First configure the organic monomer acrylamide (AM) solution with a mass percentage of 15 wt%, and then add the cross-linking agent methylenebisacrylamide (MBAM) to form a premix solution, wherein the organic monomer acrylamide (AM) and the cross-linking agent methylene The mass ratio of base bisacrylamide (MBAM) is 24:1;

[0018] Prepare micron-sized alumina and nano-sized zirconia powders in a mass ratio of 4:1, and use micron-sized magnesia and nano-sized titania powders as auxiliary sintering agents. The auxiliary sintering agent in this embodiment accounts for all the above-mentioned powders 2% of the total mass;

[0019] Disperse the above powder in the above premix, and add an appropriate amount of dispersant. In this example, SD-07 is used, and the pH value o...

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Abstract

The invention discloses a zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method; the method comprises the following steps: dipping a special provided ceramic slurry by a stack porcelainsmall brush to compost all ceramic crown inner core on a dental die surface of a clinical patient and standing the dental die; absorbing the water content on the surface of the slurry and densifying to form embryonic core, and then drying the embryonic core at a constant temperature, taking off the all ceramic crown from the dental die, and sintering the all ceramic crown at a high temperature to prepare the ceramics substrate crown. In the invention, gel systems composed of organic monomer and crosslinker are used, high solid content and strongly plastic core biscuit is obtained by the free radical polymerization reaction, nano-ceramic particles are used as dispersed phase to introduce micron ceramic matrix to prepare a nano-composite ceramic, and the nano-composite ceramic has good strenghing and toughing effect, high strength material and high toughness, small change of sintering volume, moreover the forming method of the invention is easy and fast to operate, and can prepare dental ceramics substrate crown into various complicated shapes and approach net size forming.

Description

Technical field: [0001] The invention relates to a molding method of a dental ceramic base crown. Background technique: [0002] Because the transparency and refractive index of ceramic materials are close to those of enamel, the appearance effect is similar to natural teeth, and they have good biocompatibility, which makes ceramic-based crowns more and more widely used in oral restoration. In-Ceram Zirconia (ICZ), LAVASystem, Precident-DCS-System, Cerec Sirona Dental System and other zirconia-toughened alumina composite ceramics used in dentistry have high strength and high toughness, but the volume changes greatly after high-temperature sintering , and the production cost is also higher. In order to make ceramic-based crowns with better sintering properties, there are various molding technologies such as ultra-high pressure molding, inkjet molding, ceramic moldless molding, and gel direct molding, but these methods require complex equipment and high technical requirements...

Claims

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Application Information

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IPC IPC(8): A61C13/01
Inventor 麻健丰李旭东王思钱杜若茜王晓飞金琼
Owner 温州医科大学附属口腔医院
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