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Dental partially-glass-infiltrated functionally-gradient zirconia ceramic material

A zirconia ceramic and functional gradient technology, which is applied in the application field of biomedical materials, can solve the problems of insufficient bonding force between zirconia ceramics and veneer ceramics, and achieve the effect of good biological compatibility.

Active Publication Date: 2015-07-15
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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  • Dental partially-glass-infiltrated functionally-gradient zirconia ceramic material
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  • Dental partially-glass-infiltrated functionally-gradient zirconia ceramic material

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Embodiment 1

[0028] A preparation method of a functionally graded zirconia ceramic material infiltrated with dental glass, such as figure 1 shown, including the following steps:

[0029] (1) Preparation of permeable glass material: according to the 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 1 wt%, weigh the powder of each component, put it into a ball mill jar, and use deionized water as the medium to ball mill for 6 hours, and mix thoroughly; The water is completely evaporated; the powder is put into a platinum crucible, placed in a muffle furnace, heated to 1300°C in an air atmosphere, kept at a constant temperature for 2 hours, and cooled to room temperature with the furnace; Pass through a 200-mesh sieve after drying to make glass powder;

[0030] (2) Preparation of zirconia green body by pre-sintering: the zirconia powder is pressed into a green body by cold pressing...

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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, in particular to a functionally graded zirconia ceramic material partially infiltrated by dental glass. Background technique [0002] Metal-ceramic restorative materials were once considered the "gold standard" in restorative dentistry. However, in the past ten years, metal-ceramic restoration materials have been gradually replaced by all-ceramic restoration materials with better aesthetics and biocompatibility. The current zirconia restorations mostly adopt a double-layer porcelain structure, that is, the veneering porcelain is sintered 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 high occlusal pressure, and becomes an ideal substitute material for metal-ceramic restorations. However, the bonding strength between the zirconia substrate and the veneerin...

Claims

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Application Information

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