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Fillers and composite materials with zirconia and silica nanoparticles

A nanoparticle, silica technology, applied in zirconia, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as lack of opalescence

Inactive Publication Date: 2011-10-19
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although silica-zirconia nanofillers can provide many beneficial properties, the lack of opalescence is seen as a disadvantage

Method used

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  • Fillers and composite materials with zirconia and silica nanoparticles
  • Fillers and composite materials with zirconia and silica nanoparticles
  • Fillers and composite materials with zirconia and silica nanoparticles

Examples

Experimental program
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example

[0105] Reagents and solvents were obtained from Sigma-Aldrich Corp., St. Louis, MO) unless otherwise noted.

[0106] As used herein,

[0107]"bisGMA" means 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]propane;

[0108] "TEGDMA" means triethylene glycol dimethacrylate, available from Sartomer Co., Inc., Exton, PA;

[0109] "UDMA" means diurethane dimethacrylate available from Rohm America LLC, Piscataway, NJ under the trade designation "ROHAMERE 6661-0";

[0110] "BisEMA6" refers to ethoxylated bisphenol A dimethacrylate available from Sartomer Co., Inc., Exton, PA;

[0111] "BHT" means butylated hydroxytoluene;

[0112] "BZT" refers to 2-(2-hydroxy-5-methacryloyloxyethylphenyl)-2H-benzotriazole available from Ciba, Inc., Tarrytown, NY;

[0113] "ENMAP" refers to ethyl-(N-methyl-N-phenyl)aminopropionate, synthesized using known methods, such as by Adamson et al.; JCSOA9; J.Chem.Soc.; 1949; spl.144, 152, which is incorporated herein by reference;

[0114] "CPQ" means ...

example E1-E3 and comparative example CE1-C

[0130] Examples E1-E3 and Comparative Examples CE1-CE2

[0131] Several different pastes were prepared by mixing together the components listed in Table 2 below.

[0132] Table 2. Paste formulations .

[0133]

[0134] Pastes E1, E2, E3 and CE2 showed a pronounced opalescence to the naked eye, appearing orange / yellow on a white background and blue / white on a black background. Paste CE1 did not show opalescent properties to the naked eye and appeared yellow to the naked eye on both black and white backgrounds. All pastes appeared translucent to transparent.

[0135] The opalescence of pastes E1, E3, CE1 and CE2 was quantitatively measured on a HunterLab Ultrascan XE (Hunter Associates Laboratory, Inc., Reston VA, USA) spectrophotometer, C ab Values ​​(opalescence) were obtained as follows by measuring a in reflectance against a black background and in transmittance mode * and b * The difference between the values ​​is measured. This is the vectorial difference in t...

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Abstract

Fillers containing silica-zirconia nanoclusters are disclosed. The fillers may be prepared by mixing a sol of silica nanoparticles with a sol of preformed, crystalline nanozirconia particles. The fillers provide desirable optical properties, such as opalescence, and are useful in dental compositions.

Description

technical field [0001] The present invention relates to nanoparticle fillers for composites, including dental composites. More particularly, the present invention relates to filler materials having silica-zirconia nanoclusters that provide desirable optical properties, such as opalescence, for use in dental compositions. Background technique [0002] Over the past few decades, dentists and dental patients have increasingly demanded more aesthetically pleasing dental restorations. The dental industry's increasing focus on aesthetic dentistry has led to the development of dental restoration compositions that more closely mimic the appearance of natural teeth. For example, composite resin materials have been developed that can be used to replace tooth-colored fillings such as metal amalgam fillings to provide more natural-looking dental restorations. In recent years, highly aesthetic composites containing silica and / or zirconia nanofillers have become available with shade sys...

Claims

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Application Information

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IPC IPC(8): C01G25/00C01G25/02A61K6/884
CPCA61K6/887B82Y30/00C01G25/00C01G25/02C01P2002/50C01P2002/52C01P2004/61C01P2004/62C01P2004/64C01P2006/60C01P2006/65C01P2006/66
Inventor B·D·克瑞格
Owner 3M INNOVATIVE PROPERTIES CO
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