Articles tagged with Teeth
A rare tooth discovery in Mississippi, USA, has revealed that horned dinosaurs, closely related to Triceratops, roamed freely across eastern North America during the Late Cretaceous period. The fossil, dated to around 68-66 million years ago, challenges previous assumptions about the separation of western and eastern continents.
Women who become caregivers after intimate partner violence experience increased depressive symptoms and stress. They also have worse physical health than other women, with nearly one in 20 middle-aged women in this position.
A new method in dentine analysis reveals permanent records of Vitamin D deficiency, shedding light on human adaptation and health conditions. The study offers a valuable resource for understanding rickets, affecting over 1 billion people worldwide.
Scientists have discovered the remains of a previously unknown mammal, Baidabatyr, in Western Siberia. The animal is believed to be a herbivore and lived during the Early Cretaceous period, with its species going extinct around 20 million years ago.
Researchers found T. rex could generate forces equal to three small cars while simultaneously applying world-record tooth pressures. The dinosaur's long conical teeth allowed it to drive open cracks in bone and produce catastrophic explosions.
Researchers at the University of Illinois Chicago have discovered a natural compound in grape seed extract that can strengthen dentin and increase the life of resin fillings. The study found that the extract can make composite-resin fillings stronger, allowing them to last longer.
A study published in Cell Metabolism found that a liver hormone called FGF21 may play a role in determining who has a sweet tooth. The researchers discovered two variants of the FGF21 gene associated with increased intake of sweets and candies.
The research team will test a combination of new technologies that release antibacterial agents in response to acid presence, promising longer service life and improved dental applications. The novel materials aim to inhibit oral biofilm formation and have excellent physical and mechanical properties.
Researchers discovered that signals from surrounding tissue trigger dental stem cells to proliferate and differentiate into mature tooth tissue. The findings have implications for understanding tissue renewal and could lead to improved therapies for cancer treatment.
A study by Vanderbilt University researchers reveals that man-eating lions' actions were not driven by desperation, but rather a solution to a problem. The analysis found that the lions' teeth showed wear patterns similar to those of zoo lions fed soft foods.
A new study analyzing the teeth of Tsavo's famous man-eaters reveals that dental disease played a significant role in their unusual behavior. The researchers found that the lions' teeth showed less wear and tear than expected, contradicting the hypothesis that they turned to human prey due to food shortages.
Gum disease and tooth loss are linked to a higher risk of death in postmenopausal women, according to new research. The study, which analyzed data from over 57,000 women, found that history of periodontal disease was associated with a 12% higher risk of death from any cause.
A new device called SafeRoot uses florescent dyes and fluorescence microscopy to detect minute amounts of residual live bacteria in root canals. This allows dentists to identify persistent or secondary infections and reduce the need for further treatments, potentially saving the NHS millions of pounds.
The researchers created a synthetic version of tooth enamel to improve resilience in rigid structures. They successfully mimicked its properties through layering and polymerization, demonstrating that this material can absorb vibrations effectively.
A study found that early preventive dental care among Medicaid-enrolled children in Alabama was associated with increased tooth decay-related treatment, visits, and dental expenditures. In contrast, preventive care delivered by primary care providers showed no significant association with these outcomes.
Researcher Brenda Heaton found that social networks play an overlooked role in oral health care, influencing behavior and disease prevention. She aims to use network maps to introduce health resources into communities, changing long-term behaviors and preventing tooth decay through prevention.
Mutations in specific proteins affect tooth enamel formation, leading to increased risk of caries. The study's findings open up new possibilities for preventing caries in patients with defective tooth enamel.
The AAAS/Subaru SB&F Prizes for Excellence in Science Books recognize recent publications that promote high-quality science writing and illustration, engaging readers of all ages. Winners include Sara Levine's 'Tooth by Tooth' and Pamela S. Turner's 'Crow Smarts', which explore fascinating topics like animal teeth and crow intelligence.
A team of researchers at King's College London has discovered a method to stimulate the renewal of living stem cells in tooth pulp using an Alzheimer's drug. This novel approach aims to promote natural tooth repair and potentially reduce the need for fillings or cements.
Researchers found that brain size evolved at different rates for different species, especially during Homo's evolution, while chewing teeth evolved at similar rates. This challenges the classic view that larger brains led to smaller teeth as a result of tool use.
Researchers at Tufts University School of Dental Medicine have successfully regenerated dental pulp-like tissues in animal model experiments using a collagen-based biomaterial to deliver stem cells. The approach shows promise in restoring normal tooth function and may offer an alternative to traditional endodontic treatments.
A UK soft drinks industry levy is estimated to have significant health benefits, especially among children. The study finds that reducing sugar content and increasing prices of high-sugar drinks will have the greatest impact on health.
A study of 1.2-million-year-old tartar reveals that ancient humans used a kind of toothpick to clean their teeth, while consuming a balanced diet of meat and starchy foods. The analysis also suggests they ate grass seeds and had access to forests.
Researchers found a benign tumor, called a compound odontoma, in a fossilized gorgonopsian jaw from 255 million years ago. The discovery suggests that this type of tumor may have existed before the first mammals evolved.
Researchers discovered a 255-million-year-old tumor in a gorgonopsian mammalian ancestor, revealing an ancient condition that resembles compound odontoma. This finding challenges the current understanding of vertebrate evolution, suggesting that this condition may have evolved much earlier than previously thought.
Researchers have found overwhelming evidence of malaria's existence in ancient Rome dating back to the Roman Empire. The study analyzed human remains from three Italian cemeteries and confirmed the presence of Plasmodium falciparum, a parasite responsible for nearly 450,000 deaths worldwide each year.
A Disney Research team has developed a model-based method to realistically reconstruct teeth for digital actors and medical applications, even with obscured teeth in photos or videos. The new method uses statistical modeling to create natural variations in tooth shape and spacing.
Using lead isotope analysis, UF archaeologist Ashley Sharpe has created a map to determine the birthplace of ancient people and animals in Central America. This method can help track the movement of prehistoric Maya and potentially solve mysteries surrounding their origins and demise.
Researchers found that tooth shape influenced diet and feeding biomechanics, with selection favoring maximum damage, not just force or energy. The study used 3D-printed replicas of ancient mammal teeth to test the impact of different diets on early mammals.
A team of researchers used synchrotron x-ray tomography to study a 424 million-year-old fossil fish's jawbone, providing new insights into the origin of tooth replacement. The findings suggest that the process evolved independently in two different groups of early vertebrates, using distinct mechanisms.
A new study reveals the existence of a non-proliferative signaling center in tooth development, which drives epithelial invagination and instructs neighboring cells to proliferate. The initiation knot is identified as a critical regulator of tooth morphogenesis and size determination.
A new imaging device uses long-wavelength infrared imaging to detect small thermal radiation emitted from dental caries, allowing for earlier diagnosis and potential reversal. The tool has the benefits of being noncontact, noninvasive, and low-cost, with great potential as a commercially viable diagnostic imaging device.
Researchers studied placodont teeth to understand how evolution shaped traits for survival. They found that despite predictions, later placodonts developed unique and complex teeth structures, possibly similar to early human molars.
A new study using hippo enamel isotopes reveals a shift from C4 to C3 plants in Uganda's Queen Elizabeth National Park, associated with the loss of elephants. The results provide insight into ecological crises and vegetation changes in African grasslands.
A University of Washington study found that shark teeth shape influences biting performance, with some species' teeth cutting better and dulling faster than others. The research used a reciprocating saw and glue to test tooth performance under realistic conditions.
Researchers from the University of Sydney have created three-dimensional maps showing the positions of atoms critical in the decay process using atom probe tomography. The study reveals magnesium-rich regions between hydroxyapatite nanorods, which play a key role in governing tooth behavior.
A new study found that recording smartphone videos of tooth-brushing can improve oral health care techniques, increasing accuracy and skill mastery by 8%. The study suggests using video-based monitoring apps to provide feedback from dental professionals.
University of Pennsylvania researchers have created nanoparticles that use the acidity of tooth decay to kill bacteria in dental plaque and prevent cavities. The treatment, which combines hydrogen peroxide with acid-sensitive nanoparticles, was shown to be highly effective at disrupting biofilms and killing bacteria.
Scientists at McMaster University have discovered a clear way to measure past changes in vitamin D deficiency, which affects over 1 billion people worldwide. They analyzed the microscopic structure of ancient teeth to reveal anomalies formed in dentin layers during periods of low sun exposure.
University of California, Berkeley paleontologists discover inherited dental features in primates that shed light on a mysterious increase in monkey species during climate change 8 million years ago. The traits will help track genes controlling tooth development and aid scientists in regrowing teeth.
A study reveals that Botox toxin targets neurons through its affinity for glycans, and mutating a single amino acid can abolish toxicity. This mechanism also inspires the design of anti-toxin inhibitors.
Researchers found that dentin's mechanical coupling between collagen protein fibers and mineral nanoparticles allows it to withstand extreme forces. The nanostructure design enables dentin to last longer than synthetic filling materials.
Dental drill fragments made of bio-incompatible materials are found in teeth and under fillings, posing a potential risk to patients. Further studies are needed to determine the extent of this biohazard.
A study published in Climatic Change found that emphasizing the collective causes of climate change significantly increases willingness to donate, whereas personal responsibility framing has little effect. The researchers surveyed over 1,500 participants and found a consistent increase in donations when framing the issue collectively.
Scientists are exploring the potential of bioceramic silicon nitride to treat severe gum disease, which can lead to tooth loss and increase the risk of heart attack or stroke. The material's surface has been shown to degrade bacteria responsible for periodontitis, offering a promising therapeutic aid.
A systematic review and meta-analysis published by the International Association for Dental Research reveals an association between tooth loss and reduced cognitive function in adults. Individuals with less than 20 teeth were found to be at a 20% higher risk of developing cognitive decline and dementia compared to those with more teeth.
A study of 6,885 adults found that tooth loss and untreated caries are associated with limited food intake, affecting quality of life. Researchers used NHANES data to examine the relationship between dentate status and number of teeth with untreated decay on reported limited food intake.
A new Harvard University study suggests that early humans processed meat with stone tools to reduce chewing effort, allowing for a higher-quality diet and eventual emergence of hunting and gathering. By slicing meat and pounding vegetables, researchers found a significant reduction in the number of chews required per day.
A new study led by Alistair Evans of Monash University found that molars follow the inhibitory cascade rule, simplifying human tooth evolution. The team can now predict the size of missing fossil teeth using this rule.
A study led by Dr Alistair Evans from Monash University has simplified the understanding of human tooth evolution, allowing for predictions on missing teeth. The 'inhibitory cascade' rule reveals a pattern in tooth size that was previously thought to be more complex.
A new study found that a single embryonic rule regulates hominin tooth size, with variations in the expression of this rule accounting for differences in tooth size throughout human evolution. The researchers discovered that the inhibitory cascade pattern for adult molars is directly linked to the size of milk molars.
Scientists at the University of Sheffield have identified a network of genes that enables sharks to regenerate their teeth throughout their lifetime. Humans possess similar cells, but with limited tooth regeneration ability.
Researchers at Oregon State University have made promising findings about the use of bioactive glass in composite tooth fillings, showing a significant reduction in bacterial penetration. The study suggests that bioactive glass could help slow down secondary tooth decay and provide minerals to replace those lost due to tooth decay.
Researchers have successfully multiplied teeth in mice by splitting tooth germ cells and implanting them into the jaw. This discovery could lead to new treatments for people born with missing teeth or who lose teeth due to accidents or disease.
A recent study published in the European Journal of Preventive Cardiology found that levels of tooth loss are linearly associated with increasing death rates among coronary heart disease patients. Patients with no teeth had a nearly double risk of death compared to those with all their teeth.
A University of Sydney study found that 'no-drill' dentistry can stop and reverse tooth decay without traditional fillings. The Caries Management System (CMS) reduces decay risk and need for fillings by 30-50%, partnering patients with dentists for successful treatment.
Researchers have developed a new computed tomography method that uses scattering to visualize nanostructures in objects measuring just a few millimeters. This technique allows for the precise three-dimensional visualization of collagen fibers in human teeth, revealing their detailed structure for the first time.
Researchers at USC discover enzyme MMP-20 that can regrow tooth enamel, reducing lesions by up to 70%. The breakthrough could lead to a new treatment option for tooth decay and sensitivity.
A large study of UK professional footballers found that nearly 4 out of 10 have active tooth decay, while 1 in 20 has irreversible gum disease. This poor dental health is affecting performance and wellbeing among players, highlighting the need for regular screening and preventive approaches.
Paleontologist Matthew McLain discovered a tyrannosaur bone with teeth marks indicating it was gnawed by another tyrannosaur. The grooves found on the bone suggest that the eating occurred after the animal had died, adding to evidence of cannibalism among tyrannosaurs.