tooth

U-M scientist to talk about tissue engineering at AAAS

...ists have a long tradition of finding ways to fill tooth cavities that will not heal on their own, Krebsbach said, and that has led to research in biomaterials, bone and connective tissue function, and then tissue engineering. At Michigan, tissue engineering collaboration includes dentists, M.D.s and engi...

Dinosaur DNA? New Patent Covers Degraded DNA recovery

...year. "We don't plan to turn house cats into saber tooth cats or create a Jurassic Theme Park anytime soon. But we do think this breakthrough has many applications yet to be discovered and we look forward to working with our colleagues to thoroughly examine all the possibilities," says Dr. Ensley. Dr. Ens...

UF Researchers Map Bacterial Proteins That Cause Tooth Loss

...een teeth and gums. It’s also the leading cause of tooth loss ?secreting proteins that destroy the soft tis...ptoms ranging from mild gum irritation to complete tooth loss. People with periodontal disease also are at increased risk of stroke and heart attack, and th...

Great White shark evolution debate involves WSU Lake Campus geology professor

...place their teeth, it is relatively easy to obtain tooth samples through fossil field work along the Atlant...that Great White and mako sharks have very similar tooth growth trajectories, while those of the great white and megladon are not similar. Analysis of both t...

Gene therapy promising for growing tooth-supporting bone

...a patient with a sizeable mouth wound, replacing a tooth takes more than simply implanting a new one---the ...nt also needs the bone structure to anchor the new tooth in place. Such reconstructive surgery today involves either taking a bone graft from the patient's c...

Bacteria feed on smelly breath (and feet)

...ylotrophic bacteria were isolated from the tongue, tooth plaques (supra-gingival plaques) and gum edge (sub-gingival plaques) of volunteers. They include strains of Bacillus, Brevibacterium casei, Hyphomicrobium sulfonivorans1, Methylobacterium, Micrococcus luteus and Variovorax paradoxus. The composition...

Neandertal femur suggests competition with hyenas and a shift in landscape use

... bones showing both cut marks from human tools and tooth marks from hyenas. Additionally, the human femur was gnawed by carnivores, probably hyenas. This shows that close competition for food and space persisted through the Middle Paleolithic among these Neandertals. ...

Mechanism regulating tooth shape formulation found

...ution is best known from their teeth, is how their tooth shape is altered during development. Researchers o...of induction' mechanism directing the placement of tooth shape features called cusps. Position and shape of cusps determine whether a tooth shape belongs to ...

Molecular miners find pain relief drugs from the sea

...paling them with a harpoon styled barb (a modified tooth called a radula) loaded with toxic venom. Associate Professor Livett says there are up to 200 components in each venom and there are over 500 species of cone snail, each with a different cocktail of venom peptides. Fortunately, most cone snails hunt...

Neanderthal teeth grew no faster than comparable modern humans'

...rsity of Newcastle . They found that the rate of tooth growth present in the Neanderthal fossils they exa...ulations of modern humans. And since the rate of tooth growth has become a more-accepted tool for estimating the length of childhood among hominids, the fi...

New tooth enamel dating technique could help identify disaster victims

...e in Sweden, determines the amount of carbon-14 in tooth enamel. Scientists can relate the extensive atmospheric record for carbon-14 to when the tooth was formed and calculate the age of the tooth, and its owner, to an accuracy of within about 1.6 yea...

New technology shows our ancestors ate…everything!

...crowear, the microscopic pits and scratches on the tooth surface caused by use, offers a more accurate meas...sensitive fractal analysis," to analyze fossilized tooth surfaces through a confocal microscope, which allows three-dimensional analysis of an object. "You p...

Give thanks for the cranberry, say dental researchers

...for the bacteria that causes cavities to cling to tooth surfaces. Stickiness is everything for the microbe..., quickly forming a gunky fortress that covers the tooth and gives bacteria a safe haven to munch on sugar, thrive, and churn out acid. Koo's team found that...

'Nanospheres' that block pain of sensitive teeth

...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 ou...

Ancient anthropoid origins discovered in Africa

...es whose mouths they once occupied. For example, a tooth root from the species Biretia megalopsis is truncated, indicating that it had to make room for the larger eyesocket of a nocturnal animal. "These finds seem to indicate that Biretia megalopsis must have had very large eyes, and so was likely nocturn...

Bare metal stents deliver gene therapy to heart vessels with less inflammation in animal studies

... pins and rods, pacemaker electrodes, and titanium tooth implants. "The results of our study may have broader implications for other diseases in which implantable medical devices may be used to deliver gene therapy," said Dr. Levy. Dr. Levy's co-authors included Ilia Fishbein, M.D., Ivan S. Alferiev, M.D....

Bacteria that cause tooth decay able to survive without important biochemical pathway

Leave it to the bacteria that cause tooth decay to be able to live without something all cel...icult for other helpful bacteria and demineralizes tooth enamel, causing decay. According to the U.S. Centers for Disease Control and Prevention, 95 percent...

'Banana-jawed' fossil mammal linked to rare sound-producing skill

... In order to gain answers, the Duke team measured tooth samples from the newly available fossils. "We looked first at molar teeth, which are used for grinding food, and found that all of them in our specimens were identical, so we were pretty sure they were from the same species," DeBlieux said. "But onl...

Birds that make teeth

...n of chicken harbors a genetic change that permits tooth formation in both the upper and lower jaw of embryonic birds. These teeth show similar developmental position as mammalian teeth and are associated with similar molecular instructions. Furthermore, when comparing the initial development of the struct...

Tetracycline plus teeth equal gray smile

..., AGD member and clinician, will explain how a new tooth whitening procedure he used on a patient helped si...thout the costly procedures. Dr. Capehart's new tooth whitening treatment protocol involves placing the patient on a prescription dose of fluoride toothpa...

Ultrasound may help regrow teeth

...egrow the teeth root, a patient could have his own tooth rather than foreign objects in his mouth." The device is aimed at those experiencing dental root resorption, a common effect of mechanical or chemical injury to dental tissue caused by diseases and endocrine disturbances. Mechanical injury from wea...

First human study confirms that immune cells can be a primary cause of bone loss in gum disease

...ts in soft tissue and bone destruction, leading to tooth loss. Dr. Kawai and his colleagues had found that B cells (B and T lymphocytes are immune cells) can contribute to increased periodontal bone loss coordinating with activated T-cells. Both cell types had previously been found to manifest a host imm...

Friendly bacteria in chewing gum that bites back

...teria that can destroy the bad bacteria that cause tooth decay could be in the shops soon reports Marina Mu...trepptococcus mutans, the bacteria responsible for tooth decay. S. Mutans sticks to the surface of teeth, where it produces an aggressive acid that breaks do...

Protein-coated dental implants could improve bone regeneration

...one formation may be a key advancement in treating tooth loss due to gum disease, researchers say. In lab...e in place, regeneration of the tissues around the tooth may occur within a week or two," he says. "After that, it's a matter of the wound maturing ?going t...

Report focuses on the role good microbes play in future medicine

...and inflammatory bowel disease, oral diseases like tooth decay and periodontal disease, and various other infections, including vaginal infections and possibly skin infections. Probiotics could also conceivably be put to use in preventing disease or thwarting autoimmune disorders. A number of these possi...

Researchers give name to ancient mystery creature

... of small mammals. Based on careful examination of tooth and jaw fragments that have been unearthed over the past 30 years, the University of Alberta researchers have now determined Horolodectes was a small fur-bearing animal that measured 10 centimetres in length and due to its powerful jaws, likely had a...

Artificial cornea offers better results for infants, some blind patients

...ay, physicians enshroud the implant in a patient's tooth socket, stash the mix in the patient's cheek for a few months to encourage the growth of new tissue ?all in an effort to help a patient's body accept the new device?and then implant the whole structure in the patient's eye Traditional corneas stil...

A buffet for early human relatives

...tubers and perhaps grazing animals. "By analyzing tooth enamel, we found that they ate lots of different t... common carbon-12. "The previous way to sample tooth enamel was to take a dental drill with a diamond-impregnated bit and basically grind away at the too...

Scientists re-grow dental enamel from cultured cells

...d by a layer of cells that is lost by the time the tooth appears in the mouth. The enamel spends the remain...scaffolds, along with cells from the middle of the tooth (dental mesenchymal cells). The scaffolds were then transferred into the abdominal cavities of rats,...

Xylitol reduces risk of cavities

...logy of the oral cavity and its role in preventing tooth decay (caries). In a series of studies on childre...nded as a supplement for patients at high risk for tooth decay. Xylitol products that actively stimulate the secretion of saliva should be the first choic...

Ancient amphibians evolved a bite before migrating to dry land

...ate. Living fish exhibit an incredible array of tooth and jaw shapes, suggesting that, ironically, direct analysis of fossil jaws would be a less precise means of determining the feeding methods of extinct species, Markey says. "Analysis of the sutures of the early amphibian species Acanthostega rev...

From the deep -- Researchers find new species of sea anemone

...t the size of a human molar, and even looks like a tooth with small tentacles on one side. Daly and Luciana Gusmão, a doctoral student in Daly's laboratory, describe A. pearseae in detail in a recent issue of the Journal of Natural History. The two assigned the anemone to the genus Anthosactis primarily...

Study offers clues to 'Broken Heart Syndrome'

..., ranging from armed robbery to a heated argument, tooth extraction, or preparation for a colonoscopy. "We don't know why some women develop this syndrome after what appears to be minimal stress, while other women experience severely stressful events but don't develop Takotsubo cardiomyopathy," Dr. Reg...