tooth 2 2

Tag: "tooth" at biology news

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...

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...

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...

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...

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...

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 ...

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. ...

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...

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...

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...

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...

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...

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...

1 2