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A functionally graded zirconia ceramic material partially infiltrated with dental glass

A technology of zirconia ceramics and functional gradient, applied in the application field of biomedical materials, can solve the problems of insufficient bonding force between zirconia ceramics and veneering porcelain, and achieve good biological compatibility

Active Publication Date: 2017-04-12
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of insufficient bonding force between existing zirconia ceramics and veneer porcelain, the purpose of the present invention is to provide a functionally graded zirconia ceramic material with a uniform elastic modulus and hardness and a gradually changing gradient that is partially infiltrated with dental glass, thereby Improving the bonding strength of zirconia ceramics and facing porcelain

Method used

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  • A functionally graded zirconia ceramic material partially infiltrated with dental glass
  • A functionally graded zirconia ceramic material partially infiltrated with dental glass
  • A functionally graded zirconia ceramic material partially infiltrated with dental glass

Examples

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Embodiment 1

[0028] A method for preparing partially infiltrated functionally graded zirconia ceramic material for dental glass, such as figure 1 As shown, including the following steps:

[0029] (1) Preparation of permeable glass material: according to formula La 2 O 3 15wt%, ZrO 2 5wt%, Y 2 O 3 5wt%, SiO 2 20wt%, B 2 O 3 15wt%, BaO 15wt%, Al 2 O 3 15wt%, TiO 2 4wt%, CaO 4wt%, CeO 2 1wt%, Fe 2 O 3 1wt%, weigh the powder of each component, put it into a ball mill tank, and use deionized water as the medium to ball mill for 6 hours and mix thoroughly; after ball milling, pour the slurry into a porcelain dish and dry it in an oven at 87°C for more than 24 hours until The moisture completely evaporates; put the powder into a platinum crucible, place it in a muffle furnace, heat up to 1300°C in an air atmosphere, keep it at a constant temperature for 2h, and cool to room temperature with the furnace; add the glass particles to a water ball mill according to a 2:1 ball-to-material ratio, After dryi...

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Abstract

The invention discloses a dental partially-glass-infiltrated functionally-gradient zirconia ceramic material. The dental partially-glass-infiltrated functionally-gradient zirconia ceramic material is composed of three layers, i.e., (1) a glass layer with a thickness of 0.2 mm, (2) a glass-infiltrated zirconia functionally-gradient layer with a thickness of 0.3 mm and (3) a compact zirconia layer with a thickness of 0.5 mm, wherein glass comprises, by mass, 15% of La2O3, 5% of ZrO2, 5% of Y2O3, 20% of SiO2, 15% of B2O3, 15% of BaO, 15% of Al2O3, 4% of TiO2, 4% of CaO, 1% of CeO2 and 1% of Fe2O3. The bonding strength between the dental partially-glass-infiltrated functionally-gradient zirconia ceramic material and veneering porcelain is increased by 2.5 times compared with the bonding strength of a traditional zirconia material. The dental partially-glass-infiltrated functionally-gradient zirconia ceramic material has good biocompatibility and accords with standards prescribed in ISO-7405 and ISO-7406 Technical Reports--Biological Assessment of Dental Materials.

Description

Technical field [0001] The invention belongs to the application field of biomedical materials, and specifically relates to a functionally graded zirconia ceramic material partially penetrated by dental glass. Background technique [0002] Metal porcelain restoration materials were once considered the "gold standard" of restoration dentistry. However, in the past ten years, metal porcelain restoration materials have gradually been replaced by all-ceramic restoration materials with better aesthetics and biocompatibility. Current zirconia restorations mostly adopt a double-layer porcelain structure, that is, sintered veneer porcelain on a strong base material to achieve a beautiful and firm effect. Yttrium stabilized tetragonal zirconia (Y-TZP) base material has high strength and toughness, can withstand greater occlusal pressure, and becomes an ideal substitute material for metal ceramic restorations. However, the bonding strength between the zirconia substrate and the veneer por...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B41/86
Inventor 孙挺邵龙泉刘若宇
Owner JINAN UNIVERSITY
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