Ultrafine polishing with silica nanoparticles protects teeth
Taking blood stem cells collected from an umbilical cord into the lab and expanding their number before transplanting them to replace a patient’s blood supply is as safe as a standard cord blood transplant, researchers reported at the 50th Annual Meeting of the American Society of Hematology. In a first-of-its-kind randomized clinical trial, researchers at
Full Post: Trial shows safety of pre-transplant expansion of umbilical cord blood stem cells
Clarkson University Center for Advanced Materials Processing Professor Igor Sokolov and graduate student Ravi M. Gaikwad have discovered a new method of protecting teeth from cavities by ultrafine polishing with silica nanoparticles.
The researchers adopted polishing technology used in the semiconductor industry (chemical mechanical planarization) to polish the surface of human teeth down to nanoscale roughness. Roughness left on the tooth after the polishing is just a few nanometers, which is one-billionth of a meter or about 100,000 times smaller than a grain of sand.
Sokolov and Gaikwad showed that teeth polished in this way become too “slippery” for the “bad” bacteria that is responsible for the destruction of dental enamel. As a result the bacteria can be removed fairly easily before they cause damage to the enamel.
Although silica particles have been used before for tooth polishing, polishing with nanosized particles has not been reported. The researchers hypothesized that such polishing may protect tooth surfaces against the damage caused by cariogenic bacteria, because the bacteria can be removed easily from such polished surfaces.
The Clarkson researchers’ findings were published in the October issue of the Journal of Dental Research , the dentistry journal with the top worldwide scientific impact index.
Sokolov is a professor of physics, professor of chemical and biomolecular science, and director of Clarkson’s Nanoengineering and Biotechnology Laboratories Center (NABLAB). Gaikwad is a graduate student in physics.
Read more at http://jdr.iadrjournals.org/cgi/content/short/87/10/980.
A new study addresses the growing controversy among dental health professionals regarding the best course of treatment when evaluating between a root canal or dental implant procedure. Researchers evaluated the success and failure rates of teeth treated with a root canal (endodontically treated teeth) or extracted and replaced with a dental implant. While the findings
Full Post: Researchers evaluate root canals versus extraction and dental implants
As part of a Queensland Government initiative, plans are afoot to introduce fluoride into the water supplies of a number of towns on the Tablelands, in the state’s far north by 2011. This includes towns such as Kuranda, Malanda and Yungaburra with populations of 1,000 people which will be required to provide fluoridated water under
Full Post: Tabelands towns to have fluoridated water by 2011
A University of South Carolina study of children’s dental health has found that nearly one-fourth of the nation’s children have had no dental care in at least a year. Conducted by researchers at the S.C. Rural Health Research Center at the Arnold School of Public Health, the study found that nearly 32 percent of Hispanic
Full Post: 25% of U.S. kids received no dental care in at least one year
Researchers at the University of Delaware have provided what is believed to be the first experimental evidence that plants can take up nanoparticles and accumulate them in their tissues. The laboratory study, which involved pumpkin plants, indicates a possible pathway for nanoparticles to enter the food chain. The research also reveals a new experimental
Full Post: Plants shown to accumulate nanoparticles in tissues
Researchers at the University Of Southern California, School Of Dentistry release results of clinical data that links oral bisphosphonates to increased jaw necrosis. The study is among the first to acknowledge that even short-term use of common oral osteoporosis drugs may leave the jaw vulnerable to devastating necrosis, according to the report appearing in the
Full Post: Oral bisphosphonates linked to increased jaw necrosis