Preparation method of metal stable zirconia composite ceramics for dental restorations

A technology for stabilizing zirconia and composite ceramics, which is applied in dental preparations, dentistry, and dental prostheses. It can solve the problems of restoration performance, ceramic strength reduction, and complex process steps, so as to reduce operating steps, reduce sintering temperature, cost reduction effect

Inactive Publication Date: 2013-04-24
斯尔瑞(厦门)生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complicated and prone to cracking of veneer porcelain
One solution is to combine zirconia with other materials. Although the processability of zirconia ceramics is improved, the strength of the ceramics is greatly reduced, and the performance of the restoration is affected.
However, there are no relevant reports on restoration materials with tooth-like structures.

Method used

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  • Preparation method of metal stable zirconia composite ceramics for dental restorations
  • Preparation method of metal stable zirconia composite ceramics for dental restorations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Using micromachining technology to process micron-scale grooves on the surface of the aluminum block, the width of the grooves on the surface of the obtained aluminum template is 10 μm, the depth is 10 μm, and the spacing is 10 μm;

[0041] (2) PMMA is dissolved in N,N-dimethylformamide to form a solution with a mass concentration of 5%, and a film with a thickness of 20 μm is scraped on the glass surface. After curing, the template heated to 100 ° C is pressed on the On the ultra-thin PMMA film for 1 min, after removing the aluminum template, an ultra-thin PMMA film C with the surface structure opposite to that of the aluminum template is obtained;

[0042] (3) 20g of feldspar nanopowder with a particle diameter of 100nm is evenly dispersed in 25g of water containing polyethylene glycol to obtain a slurry, and then this slurry is coated on the surface of C, and the coating thickness is 40 μm. After drying, C Rolled into a cylindrical shape and calcined at 1200°C fo...

Embodiment 2

[0046] (1) Metal formwork is metal aluminum formwork in embodiment 1;

[0047] (2) Dissolve polystyrene (PS) in acetone to form a solution with a mass concentration of 1%, scrape-coat the glass surface into a film with a thickness of 15 μm, and press a template heated to 100°C on the PS film after curing 1min, after removing the aluminum template, an ultra-thin PS film C with a surface structure opposite to that of the aluminum template was obtained;

[0048] (3) Evenly disperse 20 g of feldspar nanopowder with a particle size of 10 nm in 50 g of water containing Tween 60 to obtain a slurry, then coat the slurry on the surface of C with a coating thickness of 20 μm, and roll the roll after drying into a cylindrical shape and calcined at 800°C for 2 hours to obtain a columnar ceramic D with a through-hole structure; the amount of Tween 60 added is 10g;

[0049] (4) 80g of cerium-stabilized zirconia nanopowders with a particle diameter of 10nm (the content of cerium oxide is 10...

Embodiment 3

[0052] (1) metal formwork is with metal aluminum formwork in embodiment 1;

[0053] (2) Under the condition of 150°C, dissolve polyethylene (PE) in liquid paraffin to form a solution with a mass concentration of 10%, scrape it on the glass surface to form a film with a thickness of 30 μm, cool and solidify, and press the template heated to 150°C On the ultra-thin PE film for 1min, after removing the aluminum template, an ultra-thin PE film C with a surface structure opposite to that of the aluminum template is obtained;

[0054] (3) Evenly disperse 30 g of feldspar nanopowder with a particle size of 50 nm in 50 g of water containing Tween 80 to obtain a slurry, then coat the slurry on the surface of C with a coating thickness of 30 μm, and roll the roll after drying into a cylindrical shape and calcined at 1000°C for 2 hours to obtain a columnar ceramic D with a through-hole structure; the amount of Tween 80 added is 15g;

[0055] (4) 60g of yttrium-stabilized zirconia nanopo...

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Abstract

The invention discloses a preparation method of metal stable zirconia composite ceramics for dental restorations, and a new template-sintering process is adopted in the preparation method. The preparation method comprises the following steps of: using a micromachining technology to process a metal template, and transferring a micro structure on the surface of the metal template on a polymer ultrathin membrane; and then coating nano feldspar powder on the polymer ultrathin membrane and sintering to obtain feldspathic porcelain with micron through hole structures; and finally filling metal stable zirconia nano powder into holes of the feldspathic porcelain and sintering to obtain the metal stable zirconia composite ceramics. The composite ceramics consist of the feldspathic porcelain and the metable stable zirconia, and have microstructures which are similar to dental enamel; and the zirconia ceramics serve as enamel prisms, and the feldspathic porcelain serves as an interprismatic substance. The composite ceramics have excellent mechanical properties and toughness; and a computer-aided design (CAD) / a computer-aided manufacturing (CAM) technology is utilized to process, and the surfaces of the composite ceramics are not veneered with ceramics, so that the ceramic fracture is avoided, and the composite ceramics can serve as materials for the dental restorations.

Description

technical field [0001] The invention relates to a method for preparing metal-stabilized zirconia composite ceramics for tooth restoration, and belongs to the field of preparation of inorganic ceramic materials. Background technique [0002] At present, 40% of people in our country have dental caries; among adults, periodontal disease and gingivitis patients also reach about 80%, which will cause a high proportion of tooth loss, so there is a huge market demand for dental restoration materials . The current dental restoration materials mainly include metal materials, resin materials, ceramic materials and composite materials. Since the base structure of the metal restoration is opaque metal, it directly affects the light transmission of the restoration, making the restoration lack the vitality of the natural tooth. At the same time, metal ions can not only discolor the restoration, but also some patients have allergic reactions to metal ions. The strength of the resin rest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622A61K6/027
Inventor 苏安静何敏刘必前
Owner 斯尔瑞(厦门)生物科技有限公司
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