 |
|
Nanospheres that block pain of sensitive teeth
September 02, 2005Nanospheres could help dentists fill the tiny holes in our teeth that make them incredibly sensitive, and that cause severe pain for millions of adults and children worldwide.
Preliminary research presented today at the Institute of Physics conference EMAG-NANO 2005 shows that creating tiny spheres of a ceramic material called hydroxyapatite could be a long term solution or cure for sensitive teeth.
Sensitive teeth or 'dental hypersensitivity' is a condition that arises when the dentine of the tooth is exposed. The dentine is made up of thousands of tiny fluid-filled channels which radiate outwards from the nerve endings at the centre of the tooth. Heat, some chemicals, and physical contact can cause the fluid in these channels to move - in or out - triggering the nerve endings and causing sharp pain.
If these channels (or 'tubules') are fully or partially blocked, the flow can be reduced and the pain stopped or significantly reduced. Currently, the only way to treat this condition is through good dental hygiene - using special toothpastes and fluorine mouthwashes which encourage re-mineralization of the dentine coating.
Jonathan Earl, David Wood and Steve Milne from the Institute of Materials Research at the University of Leeds have found that the most successful particle shape for filling these channels is a 'nanosphere' and are now trying to synthesize nanospheres of hydroxyapatite. Hydroxyapatite is a ceramic material which is highly compatible with teeth and bone and so is widely used by medics for bone grafts or dental coatings (because it binds strongly with the bone material).
Earl and his colleagues grew hydroxyapatite at various pH levels to vary the size of the particles it is made up of. At normal pH, it is composed of long rod-like structures but at high pH levels the particles of hydroxyapatite become smaller and more rounded, better for fitting inside the tiny channels in teeth.
To see whether nanospheres would be successful at filling the channels they used commercially available silica nanospheres of around 40nm in diameter.
Earl said: "We found these tiny spheres are really good at filling the channels in teeth, packing inside them quite evenly and going down the holes to a good depth. They'd be the perfect shape of particle for filling these channels and reducing or preventing the pain caused by sensitive teeth".
The next stage of their research will be to work out how to synthesize nanospheres of hydroyapatite or a combination of hydroxyapatite and fluorine which would fill the holes and encourage re-mineralization at the same time and so be an incredibly powerful repair tool for dentists.
Institute of Physics
If these channels (or 'tubules') are fully or partially blocked, the flow can be reduced and the pain stopped or significantly reduced. Currently, the only way to treat this condition is through good dental hygiene - using special toothpastes and fluorine mouthwashes which encourage re-mineralization of the dentine coating.
Jonathan Earl, David Wood and Steve Milne from the Institute of Materials Research at the University of Leeds have found that the most successful particle shape for filling these channels is a 'nanosphere' and are now trying to synthesize nanospheres of hydroxyapatite. Hydroxyapatite is a ceramic material which is highly compatible with teeth and bone and so is widely used by medics for bone grafts or dental coatings (because it binds strongly with the bone material).
Earl and his colleagues grew hydroxyapatite at various pH levels to vary the size of the particles it is made up of. At normal pH, it is composed of long rod-like structures but at high pH levels the particles of hydroxyapatite become smaller and more rounded, better for fitting inside the tiny channels in teeth.
To see whether nanospheres would be successful at filling the channels they used commercially available silica nanospheres of around 40nm in diameter.
Earl said: "We found these tiny spheres are really good at filling the channels in teeth, packing inside them quite evenly and going down the holes to a good depth. They'd be the perfect shape of particle for filling these channels and reducing or preventing the pain caused by sensitive teeth".
The next stage of their research will be to work out how to synthesize nanospheres of hydroyapatite or a combination of hydroxyapatite and fluorine which would fill the holes and encourage re-mineralization at the same time and so be an incredibly powerful repair tool for dentists.
Institute of Physics
Nanospheres Current Events and Nanospheres News RSSSpecial gold nanoparticles show promise for 'cooking' cancer cells
Researchers are describing a long-awaited advance toward applying the marvels of nanotechnology in the battle against cancer. They have developed the first hollow gold nanospheres - smaller than the finest flecks of dust - that search out and "cook" cancer cells.
Hollow gold nanospheres show promise for biomedical and other applications
A new metal nanostructure developed by researchers at the University of California, Santa Cruz, has already shown promise in cancer therapy studies and could be used for chemical and biological sensors and other applications as well.
Targeted nanospheres find, penetrate, then fuel burning of melanoma
Hollow gold nanospheres equipped with a targeting peptide find melanoma cells, penetrate them deeply, and then cook the tumor when bathed with near-infrared light, a research team led by scientists at The University of Texas M. D. Anderson Cancer Center reported in the Feb. 1 issue of Clinical Cancer Research.
Engineering Nanoparticles for Maximum Strength
Because they are riddled with defects, bulk crystalline materials never achieve their ideal strength; nanocrystals, on the other hand, are so small there's no room for defects.
Gold nanostars outshine the competition
Novel nanoparticles being tested at the National Institute of Standards and Technology (NIST) have researchers seeing stars. In a recent paper, NIST scientists used surface-enhanced Raman spectroscopy (SERS) to demonstrate that gold nanostars exhibit optical qualities that make them superior for chemical and biological sensing and imaging.
New technique sees into tissue at greater depth, resolution
By coupling a kicked-up version of microscopy with miniscule particles of gold, Duke University scientists are now able to peer so deep into living tissue that they can see molecules interacting.
Turning Waste Material into Ethanol
Say the word "biofuels" and most people think of grain ethanol and biodiesel. But there's another, older technology called gasification that's getting a new look from researchers at the U.S. Department of Energy's Ames Laboratory and Iowa State University. By combining gasification with high-tech nanoscale porous catalysts, they hope to create ethanol from a wide range of biomass, including distiller's grain left over from ethanol production, corn stover from the field, grass, wood pulp, animal waste, and garbage.
Killer pulses help characterize special surfaces
Detecting deadly fumes in subways, toxic gases in chemical spills, and hidden explosives in baggage is becoming easier and more efficient with a measurement technique called surface-enhanced Raman scattering. To further improve the technique's sensitivity, scientists must design better scattering surfaces, and more effective ways of evaluating them.
Platinum nanocrystals boost catalytic activity for fuel oxidation, hydrogen production
A research team composed of electrochemists and materials scientists from two continents has produced a new form of the industrially-important metal platinum: 24-facet nanocrystals whose catalytic activity per unit area can be as much as four times higher than existing commercial platinum catalysts.
UC Davis researchers use heated nanoprobes to destroy breast cancer cells in mice
In experiments with laboratory mice that bear aggressive human breast cancers, UC Davis researchers have used hot nanoprobes to slow the growth of tumors — without damage to surrounding healthy tissue. The researchers describe their work in the March issue of the Journal of Nuclear Medicine.
More Nanospheres Current Events and Nanospheres News Articles
 |
Nanovor: Welcome to the Nanosphere: A Nanovor Field Guide by Smith & Tinker (Creator) Increase your knowledge of the Nanovor world with this comprehensive field guide! Get a first-hand glimpse into the Nanosphere and the epic battles that take place within. Each character is dissected in this guide to provide an in-depth look into the anatomy and behavior of the critters that keep our world in balance. |
 |
Silver Bugs Nanosphere (Primary Contributor) |
 |
Dog Gone Smart Jacket with Ecru Piping for Dogs, 24-Inch, Red by Dog Gone Smart Bed Dog Gone Smart is proud to introduce nanotechnology to the pet industry. We have developed the most technologically advanced dog apparel on the market. Dog Gone Smart Technology uses the performance fabric finish NanoSphere and a state-of-the-art bacteriostatic. These newly designed jackets stay clean naturally, reduce the spread of bacteria and stand up to the wear and tear of the most active dog. These fabrics are non-toxic, pet safe and environmentally friendly. The NanoSphere finish even carries the label bluesign approved. |
 |
Chakra Green Song and artist list: 1. El Nino COP 2. Drums Don't Stop ATMOS 3. Another World ASTRAL PROJECTION 4. Nanosphere Courier BYPASS UNIT 5. The Future Is Now SHAKTA 6. Pathfinder CHI-A.D. 7. Zwork S.U.N. PROJECT 8. Lunar Church MITTELSTANDSKINDER OHNE STROM and 9. Ouija OUIJA. |
 |
Hydralane Ultra Moisturizing Day Cream with Nanospheres by Hydralane Hydralane Ultra Moisturizing Day Cream with Nanospheres Rich in marine collagen, high performance, deep moisture. Ultra-Moisturizing Day Cream with Nanospheres is a high performance cream which acts on 2 fundamental principles: - Immediate hydration, thanks to DNA with marine collagen - Long-lasting miniaturization synergy, thanks to nanospheres which gradually release the active concentrates of the cream. A concentrated, light texture which is immediately absorbed, leaving the skin moisturized, soft, supple and silky. A day cream which forms an ideal make-up base. Avoid the eye contour. 50ml 1.7 oz. |
|
Ultrasound Creates Hollow Nanospheres.: An article from: High Tech Ceramics News by Business Communications Company, Inc. (Publisher) This digital document is an article from High Tech Ceramics News, published by Business Communications Company, Inc. on March 1, 2005. The length of the article is 350 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser. Citation Details Title: Ultrasound Creates Hollow Nanospheres. Publication: High Tech Ceramics News (Newsletter) Date: March 1, 2005 Publisher: Business Communications Company, Inc. Volume: 16 Issue: 10 Page: NA Distributed by Thompson... | |
|
|
Silver Bugs Nanosphere (Primary Contributor) |
![Self-assembling gold nanoparticles on thiol-functionalized poly(styrene-co-acrylic acid) nanospheres for fabrication of a mediatorless biosensor [An article from: Analytica Chimica Acta]](http://ecx.images-amazon.com/images/I/415FBN4EPVL._SL160_.jpg) |
Self-assembling gold nanoparticles on thiol-functionalized poly(styrene-co-acrylic acid) nanospheres for fabrication of a mediatorless biosensor [An article from: Analytica Chimica Acta] by S. Xu (Author), G. Tu (Author), B. Peng (Author), X. Han (Author) This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: A novel strategy to construct a sensitive mediatorless sensor of H"2O"2 was described. At first, a cleaned gold electrode was immersed in thiol-functionalized poly(styrene-co-acrylic acid) (St-co-AA) nanosphere latex prepared by emulsifier-free emulsion polymerization St with AA and function with dithioglycol to assemble the nanospheres, then gold nanoparticles were chemisorbed onto the thiol groups and formed monolayers on the surface of poly(St-co-AA) nanospheres. Finally, horseradish peroxidase (HRP) was... |
 |
Dog Gone Smart Quilted Jacket for Dogs, 12-Inch Red by Dog Gone Smart Bed Dog Gone Smart is proud to introduce nanotechnology to the pet industry. We have developed the most technologically advanced dog apparel on the market. Dog Gone Smart Technology uses the performance fabric finish NanoSphere and a state-of-the-art bacteriostatic. These newly designed jackets stay clean naturally, reduce the spread of bacteria and stand up to the wear and tear of the most active dog. These fabrics are non-toxic, pet safe and environmentally friendly. The NanoSphere finish even carries the label bluesign approved. |
 |
Nanosphere Acropod (Primary Contributor) |
| © 2009 BrightSurf.com |