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Tooth in Biological News

Home tooth bleaching slightly reduces enamel strength

COLUMBUS, Ohio New research shows that human teeth lost some enamel hardness after the application of several different products used in the home to whiten teeth. The study suggests that future generations of such products might be reformulated in an effort to reduce these side effects. The re...

Modern lifestyle prevents tooth decay

New research has found that modern lifestyle habits may play a bigger role than food alone, when it comes to tooth decay. A review of the scientific evidence over the past 150 years found that the effects of fluoride toothpaste, good oral hygiene and health education, may override the effects ...

Drink brewed tea to avoid tooth erosion

CHICAGO (November 25, 2008) - Today, the average size soft drink is 20 ounces and contains 17 teaspoons of sugar. More startling is that some citric acids found in fruit drinks are more erosive than hydrochloric or sulfuric acidwhich is also known as battery acid. These refined sugars and acids fo...

Blue light used to harden tooth fillings stunts tumor growth

A blue curing light used to harden dental fillings also may stunt tumor growth, Medical College of Georgia researchers say. "The light sends wavelengths of blue-violet light to the composite, which triggers hardening," says Alpesh Patel, a rising MCG School of Dentistry junior. "The light waves...

NYU dental professor discovers biological clock linking tooth growth to other metabolic processes

This clock, or biological rhythm, controls many metabolic functions and is based on the circadian rhythm, which is a roughly 24-hour cycle that is important in determining sleeping and feeding patterns, cell regeneration, and other biological processes in mammals. The newly discovered rhythm, l...

Red pandas reveal an unexpected (artificial) sweet tooth

PHILADELPHIA (April 15, 2009) -- Researchers from the Monell Center report that the red panda is the first non-primate mammal to display a liking for the artificial sweetener aspartame. This unexpected affinity for an artificial sweetener may reflect structural variation in the red panda's sweet ...

'Ancestral eve' was mother of all tooth decay

A New York University College of Dentistry (NYUCD) research team has found the first oral bacterial evidence supporting the dispersal of modern Homo sapiens out of Africa to Asia. The team, led by Page Caufield, a professor of cariology and comprehensive care at NYUCD, discovered that Streptoc...

Attacking cancer's sweet tooth is effective strategy against tumors

An ancient avenue for producing cellular energy, the glycolytic pathway, could provide a surprisingly rich target for anti-cancer therapies. A team of Harvard Medical School (HMS) researchers knocked down one of the pathway's enzymes, LDHA, in a variety of fast-growing breast cancer cells, effec...

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 cells were thought to require. Scientists have long believed a certain biochemical pathway involved in the folding and delivery of proteins to cell membranes is essential for survival. Now University of Flor...

New tooth enamel dating technique could help identify disaster victims

Remnants of above-ground nuclear testing provide a way to determine age at time of death The radioactive carbon-14 produced by above-ground nuclear testing in the 1950s and 1960s is providing forensic scientists with a more precise way to determine a person's age at the time of death. The metho...

Mechanism regulating tooth shape formulation found

One of the remaining challenges for evolutionary developmental studies of mammals, whose evolution is best known from their teeth, is how their tooth shape is altered during development. Researchers of the University of Helsinki together with their Japanese colleagues from the University of Kioto n...

UF Researchers Map Bacterial Proteins That Cause Tooth Loss

The human mouth teems with millions of enamel-eroding, gum-inflaming microbes. One of these, Porphyromonas gingivalis, is a bacterial homesteader that stakes a claim deep within the spaces between teeth and gums. It’s also the leading cause of tooth loss ?secreting proteins that destroy the soft...

Healing power of aloe vera proves beneficial for teeth and gums, too

... gained some popularity as an active ingredient in tooth gel. Similar to its use on skin, the aloe vera in tooth gels is used to cleanse and soothe teeth and gums,...GD) clinical, peer-reviewed journal. Aloe vera tooth gel is intended to perform the same function as to...

Analysis of Copernicus putative remains support identity

...me profile as the putative remains of Copernicus", says Marie Allen, researcher at Uppsala University. The Uppsala researchers also made tests of a tooth as well as bone tissue from the putative remains of Copernicus. Results from the analysis of the remains from the Institute of Forensic Research in Kr...

OJ worse for teeth than whitening says Eastman Institute researchers

... out to learn if there are negative effects on the tooth from using whitening products. Eastman Institut...edly decreased hardness and increased roughness of tooth enamel. Unlike ever before, researchers were ab...anning microscope. "The acid is so strong that the tooth is literally washed away," said Ren, whose finding...

Structural biology scores with protein snapshot

...AGK may be a therapeutic target for certain types of bacterial infections. It is a virulence factor in the bacteria Streptococcus mutans, which causes tooth decay. Sanders selected DAGK as a model for studying membrane enzymes when he started his own research lab 17 years ago. DAGK is the smallest known ...

CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness

...topic signatures of carbon from enamel layers that form sequentially during tooth eruption allowed the team to pinpoint the types of plant materials consumed...Eberle said. "We were able to use carbon signatures preserved in the tooth enamel to show that these mammals did not migrate or hibernate," said Eberl...

Newly discovered reactions from an old drug may lead to new antibiotics

...loping a new line of antibiotics for bacteria that commonly cause diarrhea, tooth decay and, in some severe cases, death. The trace mineral selenium is fo...ad already established that stannous salts are more effective at preventing tooth decay and inhibiting growth of T. denticola, but the mechanism of this inhi...

Is vitamin D deficiency linked to Alzheimer's disease and vascular dementia?

...ose with higher serum 25(OH)D levels had greatly reduced risk of incidence or death from cardiovascular diseases. Several studies have correlated tooth loss with development of cognitive impairment and Alzheimer's disease or vascular dementia. There are two primary ways that people lose teeth: dental ...

A combined tooth-venom arsenal revealed as key to Komodo dragon's hunting strategy

... them, leaving the prey to bleed to death from the horrific wounds inflicted. We have now shown that it is the combined arsenal of the Komodo Dragon's tooth and venom that account for their hunting prowess," said Dr Fry from the Department of Biochemistry and Molecular Biology, Bio21 Institute at the Unive...

Genital stimulation opens door for cryptic female choice in tsetse flies

...gs, and so on. With Daniel Briceo, professor of biology at the University of Costa Rica, Eberhard modified male genital structures by cutting off a tooth that is typical of this species of tsetse fly and by smoothing a bristly surface by applying a coat of nail polish. In addition, they modified the sen...

True grit

...t another amazing structural feature of sea urchin tooth design. They found that all the crystalline elements that make up the tooth are aligned in two different arrays, and that thes...he fingers of folded hands, just at the tip of the tooth where most of the wear occurs. The scientists beli...

Sugar on bacteria surface serves as base for a web of resistance

...ons beyond medicine. Fortified by the moist environment, plentiful nutrients and easy access to the human mouth, biofilms are also responsible for tooth decay. These microcolonies, when they are able to contact water or soil, also attach to certain industrial surfaces, causing corrosion and other damag...

April 2009 Geology and GSA Today media highlights

... and habitat preferences were impacted by climate change and, in turn, how these ecological changes correlate with diversity patterns for this region. tooth enamel was sampled by Clementz et al. from 57 specimens of sirenians from the Tethys-Mediterranean and adjacent seas spanning the Eocene to Pliocene. ...

Teeth of Columbus' crew flesh out tale of new world discovery

...e leader of the team conducting an analysis of the tooth enamel of three individuals from a larger group ex...rent carbon isotope ratio profiles locked in their tooth enamel. "Heavy carbon means you were eating tro...lants and animals. The strontium isotopes found in tooth enamel, the most stable and durable material in th...

Tufts University professor receives IADR Pharmacology/Therapeutics/Toxicology Award

...vary flow, and understanding why patients with dry mouth are susceptible to tooth decay. She has spearheaded numerous other areas of therapeutic research that have included studies on tooth sensitivity, effects of implants in restoring nutrition in the elderly, and...

Dr. King receives IADR Craniofacial Biology Research Award

...ty of investigations in basic science and some clinical areas related to craniofacial biology, with a primary interest in bone biology and orthodontic tooth movement. He has more than 90 publications to his credit and has served on myriad committees at national and international levels. Supported by Unil...

Scientists discover why teeth form in a single row

...eting one gene caused the activation of a complete tooth developmental program outside of the normal tooth row in those mice. Finding out how the extra teeth developed will reveal how nature makes a tooth from scratch, which will guide...

Childhood chicken pox could affect oral health years later

...ult, the jaw bone suffers severe damage and/or death, eventually leading to tooth loss. While the exact reason for tooth loss is unknown, it has been noted that restricted blood flow and inflammat...

Toothsome research: Deducing the diet of a prehistoric hominid

...eter Lucas came in handy. Driven by an interest in tooth restoration materials, they had been studying teet... this enables us to determine trends for different tooth sizes, different food sizes, different food hardne...ght the most important part of the survival of the tooth is wear, but its now becoming evident that the fra...

February 2009 Geology and GSA Today media highlights

...bate; support for the Snowball Earth hypothesis; what nine-million-year-old tooth enamel says about vegetation in an ancient sub-Himalayan ecosystem; anthrop.... use stable carbon isotope ratios measured in 9-million-year-old mammalian tooth enamel from northern Pakistan to reveal how the landscape and vegetation va...

Early humans had 'jaws of steel'

... with another specimen with teeth to make the virtual model of the bone and tooth structure. "Then we looked at chimpanzees, who share common features wit...ecialized diet," said Spencer. "The enlargement of the premolars, the heavy tooth enamel and the evidence now that they were loading forcefully on the molars...

Tom Cruise smile comes with a sunburn price

... UV light-enhanced tooth bleaching is not only a con, but is dangerous to your eyes and skin, says a...eeth. These grooves make the teeth more vulnerable to mechanical stress. tooth bleaching is one of the most popular cosmetic dental treatments available. ...

Scientists uncover evolutionary keys to common birth disorders

... the human MSX1 gene in two different birth disorders: either cleft lip and palate or skin derivative disorders ('ectodermal dysplasias') that include tooth and nail malformations. The mutations associated with the more severe clefting disorder are found within unique portions of the MSX protein, thus prov...

Girls have superior sense of taste to boys

...h and do not think of themselves as being fussy eaters. Boys have a sweeter tooth than girls. And teenagers taste differently. The findings of the world's l...ther hand, tend to like the more extreme flavours. Boys also have a sweeter tooth than girls most of the boys preferred the super sweet soft drink variety. ...

Pitt researchers use fluorescence to develop method for detecting mercury in fish

... researchers also tested for mercury leaching from dental amalgam, a common tooth filling composed primarily of mercury mixed with smaller amounts of other m... in the United States). To test for leaching, the team pressed a cloth to a tooth with an amalgam filling for one minute; the sample glowed when exposed to t...

Eastman Dental Center awarded $1.6 million to find ways to prevent cavities

...uces polymers, using sucrose to help them, and other pathogens, to cling to tooth surfaces, forming biofilms, known as dental plaque. Basically, once the bacteria are firmly attached on the tooth surface, it creates cavities by eating sugars and then excreting acids that...

Vitamin D a key player in overall health of several body organs, says UC Riverside biochemist

... and two-thirds of the rest of the world are not getting enough vitamin D to maintain healthy bone density, lower their risks for fracture and improve tooth attachment. "There needs to be a sea change by various governmental agencies in terms of the advice they present to citizens about how much vitam...

October 2008 GEOLOGY and GSA TODAY media highlights

...ld scavenging by bismuth melts coexisting with hydrothermal fluids Blake tooth et al., Geology and Geophysics, School of Earth and Environmental Sciences,...ch metallic melts are observed in many magmatic-hydrothermal gold deposits. tooth et al. illustrate the importance of this additional liquid phase during ore...

Gene enhancer in evolution of human opposable thumb

... us different from chimpanzees and other apes. Thus, the many observable differences between humans and chimpanzees, such as brain size, hair density, tooth patterns, pelvic structure and hand and foot modifications, could have arisen partly through changes in the way developmental genes are turned on. ...
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