Novel dental zirconium oxide prosthesis and its preparing process

A technology of zirconia and prosthetics, which is applied in the field of dental colored zirconia prosthetic materials and its preparation, can solve the problems of little research on colored zirconia prosthetics and insufficient strength, and achieve the goal of controlling production costs and product quality Effect

Inactive Publication Date: 2007-04-11
温宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of nano Y by chemical co-precipitation method 2 O 3 -CeO 2 -ZrO 2 Powder

[0026] 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 as a dispersant in the mixed solution, and then an excessive amount of ammonia is added for precipitation, and the pH value is controlled to be greater than or equal to 10. The colloidal precipitate is washed with deionized water to remove chloride ions (with AgNO 3 Instruction), disperse with ultrasonic 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, where Y 2 O 3 : CeO 2 : ZrO 2 The molar ratio of is 1.5:3:95.5. Use the same method to take 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 make other Y-Ce-TZP powder, where Y 2 O 3 : CeO 2 : ZrO 2 The molar ratio of 1.5~3...

Embodiment 2

[0027] Example 2 Manufacturing of dental products

example 1

[0029] Using 871.71g of nanometer (1.5mol% Y 2 O 3 +3mol% CeO 2 +95.5mol%ZrO 2 )Y-Ce-TZP powder and 127.24g nano Al 2 O 3 (Hangzhou Dayang Nano Technology Co., Ltd.) and 0.97g colorant 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 of is 1.5:3:95.5:15:0.025. Ball mill the above mixture in deionized water containing 20% ​​(volume) of ethanol for 24 hours, then add polyvinyl alcohol (PVA) to make the concentration of PVA reach 1% (volume), ball mill for 2 hours, and perform spray granulation at 200°C , Obtain 60-80μm particles, use this particle powder to isostatically press under 200MPa pressure, and then cut into green bodies, put them in an electric furnace at 1050℃ for preliminary sintering for 2h, and both the heating and cooling speeds are 2℃ / min. Then sinter at 1500℃ for 2h, and cut the finished sample into Φ10×1mm for L * , A * , B * Optical testing.

[0030] Result: The color custard yellow, L * = 73.2; a * =1.9; b * = 16.2; make 30×4×3m...

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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 present invention belongs to the field of dental materials. Specifically, the present invention relates to a dental colored zirconia restoration material and a preparation method thereof. Background technique [0002] Zirconia restorations made of tetragonal zirconia (the zirconia also contains yttrium oxide or cerium oxide 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 silicate. Their main disadvantage is insufficient strength. The flexural strength of the restoration is usually only about 500MPa, while the fracture toughness is 5MPa·m 1 / 2 about. For this reason, people use non-silicate ceramic materials for research. However, as disclosed in the Chinese patent application CN1695591A, the use of alumina cer...

Claims

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Application Information

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