Novel dental zirconium oxide prosthesis and its preparing process

A zirconia and restoration technology, applied in the field of dental colored zirconia restoration materials and their preparation, can solve the problems of few researches on colored zirconia restorations and insufficient strength, and achieve the goal of controlling production costs and product quality. Effect

Inactive Publication Date: 2009-05-06
温宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent applications CN1103283A, CN1489988A, CN1678251A and Chinese patent CN1073840C disclose dental restorations made of glass-zirconia ceramic materials, which contain glass components mainly composed of silicates. Their main disadvantage is that they are not strong enough. The bending strength of the prosthesis usually can only reach about 500MPa, while the fracture toughness is 5MPa m 1 / 2 about
Although there are also pairs of Y-Ce-TZP (including Y 2 o 3 and CeO 2 zirconia) system research, but little research on colored zirconia restorations

Method used

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  • Novel dental zirconium oxide prosthesis and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of Nano Y by Chemical Co-precipitation 2 o 3 -CeO 2 -ZrO 2 Powder

[0027] Take 3mol Y(NO 3 ) 3 ·5H 2 O, 3molCe(NO 3 ) 3 ·6H 2 O and 95.5mol ZrOCl 2 ·8H 2 O is dissolved in water and mixed, a small amount of polyethylene glycol is added to the mixed liquid as a dispersant, and excess ammonia water is added to precipitate, and the pH value is controlled to be greater than or equal to 10, and the colloidal precipitate is washed with deionized water to remove chloride ions (using AgNO 3 Instructions), disperse by ultrasonic wave for 10 minutes. After the precipitate was dried at 110°C, it was calcined at 800°C for 1 hour, then ground and spray-dried to obtain Y-Ce-TZP powder, wherein Y 2 o 3 : CeO 2 : ZrO 2 The molar ratio is 1.5:3:95.5. Use the same method to get the corresponding amount of Y (NO 3 ) 3 ·5H 2 O, Ce(NO 3 ) 3 ·6H 2 O and ZrOCl 2 ·8H 2 O can produce other Y-Ce-TZP powders, where Y 2 o 3 : CeO 2 : ZrO 2 The mol...

Embodiment 2

[0028] Example 2 Manufacture of dental articles

example 1

[0030] With 871.71g the nanometer (1.5mol% Y 2 o 3 +3mol% CeO 2 +95.5mol% ZrO 2 )Y-Ce-TZP powder and 127.24g nanometer Al 2 o 3 (Hangzhou Dayang Nano Technology Co., Ltd.) and 0.97g coloring agent Bi 2 o 3 mixed, where Y 2 o 3 : CeO 2 : ZrO 2 :Al 2 o 3 : Bi 2 o 3 The molar ratio is 1.5:3:95.5:15:0.025. The above mixture was ball milled and mixed in deionized water containing 20% ​​(volume) ethanol for 24 hours, then polyvinyl alcohol (PVA) was added to make the concentration of PVA reach 1% (volume), ball milled for 2 hours, and spray granulation was carried out at 200°C , to obtain 60-80μm particles, use this particle powder to form isostatic pressing under 200MPa pressure, then cut into blanks, put them in an electric furnace for initial sintering at 1050°C for 2h, and the heating and cooling speeds are both 2°C / min. Then sinter at 1500°C for 2h, and cut the sample into Φ10×1mm for L * 、a * , b * optical test.

[0031] Result: naked eye color creamy yellow...

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Abstract

The invention relates to a dental prosthesis of zirconia material with tetragonal nanometer-sized ZrO2-CaO powder and much added amount of alumina. Said invention also relates to tooth body and false tooth prepared by said above tetragonal nanometer-sized ZrO2-CaO powder and zirconia material for prosthesis, so that making color transparency L*=64-81,colority a*=-1.04- 5.63 and b*=6.95-21.88,thus natural color.

Description

technical field [0001] The invention belongs to the field of dental materials, in particular, the invention relates to a dental colored zirconia restoration material and a preparation method thereof. Background technique [0002] Zirconia restorations made of tetragonal zirconia (zirconia also contains yttria or ceria or both) have been widely used in the preparation of dental restoration materials. Chinese patent applications CN1103283A, CN1489988A, CN1678251A and Chinese patent CN1073840C disclose dental restorations made of glass-zirconia ceramic materials, which contain glass components mainly composed of silicates. Their main disadvantage is that they are not strong enough. The bending strength of the prosthesis usually can only reach about 500MPa, while the fracture toughness is 5MPa m 1 / 2 about. For this reason, researches have been conducted on silicate-free ceramic materials. However, as disclosed in the Chinese patent application CN1695591A, the use of alumina c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/02C04B35/48A61C13/00
Inventor 温宁田杰谟伊元夫
Owner 温宁
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