Articles tagged with Teeth
Researchers at NYU College of Dentistry discovered that excessive fluoride causes dental fluorosis by altering calcium signaling, mitochondrial function, and gene expression in tooth enamel cells. This understanding provides a promising mechanistic view of how fluorosis arises.
A new study by West Virginia University researchers links higher concentrations of perfluorodecanoic acid in children's blood to increased tooth decay rates. The chemical, found in some drinking water systems, may disrupt the healthy development of enamel, making teeth more susceptible to cavities.
A new skeleton discovered in Tulum's submerged caves provides evidence for an early settlement of the Yucatán Peninsula, Mexico. The Chan Hol 3 skeleton, found to be approximately 30 years old and a woman, has a distinctive skull shape that contrasts with other American crania from a similar age range.
Researchers developed a method to evaluate ancient human geographic origins using lead isotopes from tooth enamel, which showed consistency with local prehistoric animals. The study suggests that at least five individuals were from southwest Arkansas, providing new insights into the Caddo Indian burial practice.
Researchers developed a bioactive peptide that coats tooth surfaces to prevent cavities and heal existing ones. The peptide inhibits bacterial adhesion and promotes remineralization, offering a potential new strategy for treating tooth decay.
Researchers at Berkeley Lab have made significant strides in developing a novel cancer drug that targets KRAS gene mutations, as well as chelating heavy metals with artificial proteins. Additionally, scientists have discovered a natural mechanism in human tooth enamel that prevents cracks from forming, allowing teeth to last a lifetime.
A miniaturized tooth system, called a 'tooth-on-a-chip,' mimics a human molar to study how teeth respond to dental materials and bacteria. The device could lead to more effective cavity fillings that last longer and work better for each patient.
A new study found that preventing tooth decay from occurring is the most effective way to help avoid pain and infection. Three-year trial shows no evidence to suggest fillings are more successful than sealing or preventive techniques in treating tooth decay in primary teeth.
Oral health risks for older adults include increased incidence of tooth decay, gum disease, and complete loss of teeth. Practicing good oral hygiene, using fluoride treatments, and getting regular dental care can help prevent these complications.
Researchers have discovered human teeth in Manot Cave that date back 40,000 years, revealing the presence of Aurignacians from Europe. The findings suggest a common origin between European populations and those in the Levant.
A new study by University of Bristol scientists reveals that meat-eating theropod dinosaurs had broadened their food base. The researchers analyzed the jaws and teeth of 83 theropod dinosaurs, including giants and small ones, to describe every possible jaw shape and tooth shape in terms of about 80 measurements.
A team of scientists has discovered ancient fossil teeth in the Yukon, which are believed to belong to a long-extinct cousin of modern rhinoceroses. The discovery provides a gap in the fossil record and sheds light on the migration patterns of animals during the Tertiary Period.
A study from King's College London found that sugary soft drinks are associated with both obesity and tooth wear among adults. The acidic nature of these drinks leads to tooth erosion, particularly in obese patients. This highlights the importance of monitoring calorie intake through acidic sugar-sweetened drinks.
Researchers uncover unique tooth for preening feathers and establish distinct lineage between North American and Asian dromaeosaurids. The discovery provides valuable insight into the evolution of theropod dinosaurs around the world.
Researchers at the University of Washington have confirmed that piranhas and pacus lose and regrow all teeth on one side of their face multiple times throughout their lives. This unique system allows them to distribute stress over their teeth, enabling efficient chewing and potentially justifying the loss of a full set of teeth.
Research found that 45-year-old slow walkers have 'accelerated aging' on a 19-measure scale, with poorer lung function, teeth, and immune systems compared to faster walkers. Early life neurocognitive testing also predicted walking speed at age 45.
Adults with tooth loss due to nontraumatic events are more prone to heart attacks and strokes. Researchers analyzed 316,588 US participants aged 40-79, finding a significant association between oral health and cardiovascular disease.
Pink sea urchin teeth are specially equipped to sharpen themselves through a controlled chipping mechanism, maintaining their sharp edge. The unique structure of the teeth, consisting of ceramic composites and calcite fibers, allows for this self-sharpening process, which is also relevant for designing synthetic materials.
Researchers have discovered key molecules that help form the periodontal ligament, a tissue crucial for tooth stability. The study sheds light on how these molecules work together to control cell functions, which could lead to new dental treatments for gum disease and other conditions.
Researchers analyzed fossilized teeth to discover that ancient humans significantly breastfed their infants for longer periods than contemporary relatives. Early Homo offspring was breastfed until around 3-4 years old.
A new study by UCL found that nearly half of elite athletes have untreated tooth decay and a third report negative impacts on training and performance. Despite frequent brushing and flossing habits, sports drinks, energy bars, and energy gels are linked to increased risk of oral disease.
An observational study found a significant association between maternal urinary fluoride concentrations and lower IQ scores measured in children aged 3-4. Maternal exposure to 1-mg/L of fluoride was associated with a 4.5-point lower IQ score in boys, while a higher intake of fluoride was linked to a 3.7 point lower IQ score among both ...
The newly discovered Clevosaurus hadroprodon is the oldest known fossil of its kind in Gondwana, dating back to around 237-228 million years ago. Its unique dentition features a mix of primitive and derived teeth, challenging current understanding of sphenodontian evolution.
Researchers at the University of Missouri found that crocodiles have thin tooth enamel, unlike humans and other hard-biting species. This discovery could lead to new approaches for dealing with people's teeth.
Researchers have uncovered a new mechanism for tooth repair by identifying a new population of mesenchymal stromal cells that contribute to dentin formation. These cells send signals to control cell production through the molecular gene Dlk1.
A new method of tooth repair has been discovered by scientists, who found that a gene called Dlk1 enhances stem cell activation and tissue regeneration in tooth healing. This mechanism could provide a novel solution for tooth problems such as decay and trauma treatment, and further studies are needed to validate the findings.
A team of scientists has discovered the world's smallest fossil monkey, weighing less than half a pound and measuring just double the size of a pin. The 18-million-year-old Parvimico materdei helps fill a gap in the record of monkey evolution.
A University of Queensland study found that some young children are spending an average of 50 minutes per day on screens, exceeding the national guideline of zero screen time in children under two. The guidelines aim to provide a healthy start for children and limit screen time to promote development and growth.
Researchers analyzed fossilized teeth from an extinct human species and found evidence of barium accumulation suggesting breast feeding up to a year, helping overcome seasonal food shortages. This finding may inform strategies to improve modern breast-feeding practices.
Australopithecus africanus mothers breastfed their infants continuously from birth to about one year of age. The research team analyzed over two-million-year-old teeth and found that nursing appears to continue in a cyclical pattern, with the mother supplementing gathered foods with breastmilk during seasonal changes and food shortages.
Researchers at Tel Aviv University have developed novel dental restoratives that display potent antibacterial capabilities, potentially preventing recurrent cavities and tooth decay. The resin-based composites incorporate antibacterial nano-assemblies to hinder bacterial growth and viability on dental restorations.
A team of researchers found a peculiar tooth composition in great white sharks and their relatives, which is similar to that of the fossil shark Palaeocarcharias stromeri. The shared tooth histology indicates that this small shark gave rise to one of the most iconic shark lineages.
A DNA test of a tooth fragment from Jeff Weakley's foot, retrieved after a 24-year blister, identified the blacktip shark species responsible for the 1994 bite. The study aims to improve bite mitigation strategies by providing more precise data on unidentified species.
Researchers found ancient crocodile relatives had complex teeth indicating herbivory, appearing three to six times in the dataset. The findings suggest a veggie diet arose at least three times and possibly six times in the distant cousins of modern crocodiles shortly after mass extinctions.
Researchers at Far Eastern Federal University have discovered chromophobe cells that contribute to human tooth development. The findings provide a basis for developing bioengineering therapies in dentistry and gastroenterology, potentially leading to more effective treatments with longer-lasting implants.
The ancient community of Çatalhöyük, settled around 9,000 years ago, faced problems similar to those of modern cities. The residents suffered from high infection rates due to poor hygiene and crowding, as well as environmental degradation and climate change.
A team of researchers found that the unique nanostructure of deep-sea dragonfish teeth is responsible for their transparency. The findings provide insights into this adaptation and could lead to the development of new transparent ceramics.
A team of scientists discovered a new group of people who lived in north eastern Siberia during the last Ice Age. The Ancient North Siberians had a mosaic genetic make-up and were closely related to both Europeans and Asians.
Deep-sea dragonfish have evolved transparent teeth with nanostructured nanocrystals, allowing them to capture prey effectively in the dark depths. The unique adaptation helps the fish avoid being shunned away by its own huge teeth.
A new study has found that Neanderthals and modern humans diverged at least 800,000 years ago, contradicting previous estimates of around 300,000-500,000 years. The research used dental evolutionary rates to analyze early Neanderthal fossils from Sima de los Huesos, Spain.
Dentist Sharukh S. Khajotia is investigating decay and tooth-colored filling materials to extend their lifespan, potentially saving patients' tooth structure and reducing healthcare costs.
A new study published in Pediatrics found that genetic makeup does not predispose people to tooth decay, but children with overweight mothers are more likely to develop cavities. The research suggests that environmental factors such as diet and lifestyle play a significant role in dental health.
A team of engineers, dentists, and biologists from the University of Pennsylvania developed microscopic robotic cleaning crews that can precisely and non-invasively remove dental plaque. The robots use catalytic activity to kill bacteria and break down biofilms, offering a potential solution for biofilm-related infections.
A study led by NYU Dentistry researchers reveals that a mutation in the ORAI1 gene causes calcium deficiency in enamel cells, leading to defective dental enamel mineralization. The study identified ORAI1 as the dominant protein for calcium influx and provided insights into the mechanisms by which calcium affects enamel cell function.
Researchers reveal how the modern human face evolved over four million years, influenced by dietary changes, tool use, and social interactions. The study's findings suggest that the face's shape and features reflect our species' adaptability to different environments and cultural contexts.
Researchers found that hydrogen peroxide in whitening strips damages dentin tissue beneath the enamel. The active ingredient converts collagen into smaller fragments, potentially causing permanent tooth damage.
Primary care dentists missed 67% of bone loss and 40% of tooth decay on dental x-rays when given limited time to assess them. When not under pressure, the participants diagnosed correctly, all pathologies related to bone loss and tooth decay, on average.
Researchers discovered that labiodentals, made by touching lower lip to upper teeth, increased dramatically in recent millennia following agriculture development. This finding suggests language is shaped by culturally-induced changes in human biology to a previously underrecognized extent.
A study by an international team led by researchers at the University of Zurich found that diet-induced changes in the human bite resulted in new speech sounds, contradicting the theory of a fixed range of human sounds. This shift allowed for the rise of labiodentals, such as the sound 'f', in modern languages.
Poorer cognitive function in older adults is associated with poorer oral health and a higher risk of tooth loss. A study of 4,416 UK adults found that those with lower cognitive function scores had a 39% higher odds of tooth loss compared to those with higher scores.
Researchers found that increased dust loads result in decreased chewing efficiency in chimpanzees. The consumption of dust-covered foods created micrometer-scale surface texture features on cheek teeth, leading to larger mean fecal particle sizes.
A study of megalodon and its ancestor Carcharocles chubutensis found that the iconic shark's teeth took millions of years to evolve from three-pronged forks to broad, flat cutting tools. The transition was a slow process that occurred over 20-7.6 million years.
Researchers analyzed a fossilized tooth of an extinct giant ground sloth found in Belize to understand its diet and climatic exposure. The study revealed seasonal fluctuations in the animal's diet, with grasses and shrubs likely comprising its diet during wet seasons.
A team of researchers from the University of Illinois has discovered that a giant sloth found in Belize, which lived around 27,000 years ago, had a diverse diet that shifted between wet and dry seasons. The study reveals that the creature adapted to its environment by relying on plants more available during dry periods.
Researchers at King's College London found that Wnt signalling can be activated to revive a rudimentary dental lamina (RSDL) in mice, allowing for the formation of additional teeth. This breakthrough demonstrates potential for tooth replacement and provides insights into mammalian evolution and trait restoration.
Research by Thomas Boyce, a CIFAR Fellow, shows that children from lower socio-economic backgrounds have higher levels of cortisol in their saliva and more cavity-causing bacteria around their gums. His study aims to understand why some children struggle and how all can thrive, as explored in his new book The Orchid and the Dandelion.
A University of Adelaide study found that orthodontic treatment has no long-term impact on dental health. The research followed 448 participants from age 13 to 30 and found that those with straight teeth still required regular brushing and check-ups to prevent decay.
A recent study found an ancient relative of humans, known as the Xujiayao juvenile, had dental development similar to that of people today. This suggests a slow life history like modern humans with prolonged childhood dependency.
Researchers analyzed a juvenile archaic Homo fossil from Northern China, finding most dental development traits fall within the modern human range. The study suggests that a slow life history similar to that of modern humans may have appeared prior to fully modern human morphology.
Research team finds that plant phytolith and water content cause differing degrees of tooth enamel abrasion in vertebrates. The study suggests that tooth wear can be used to reconstruct the dietary behavior and habitats of extinct animals, with implications for paleontology.