Articles tagged with Teeth
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
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.
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 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.
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 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 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 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.
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.
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.
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.
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 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.
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.
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.
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.
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.
Researchers observed cyclical weight fluctuations in zoo elephants that correlate with tooth change process, finding a yo-yo effect in their weight. This phenomenon is unlikely to be observed in wild elephants due to seasonal food availability differences.
Scientists have discovered that humpback whales retain tooth germs until late in gestation, a surprising finding that sheds new light on the evolutionary transformation of these marine mammals. This discovery was made possible by advanced CT scanning technology and provides valuable insights into the development of whale anatomy.
A recent study published in the American Journal of Hypertension found that postmenopausal women who have lost all their teeth are at a 20% higher risk of developing hypertension. The association was stronger among younger women and those with lower body mass index.
A recent study published in the American Journal of Hypertension found that postmenopausal women with tooth loss are more likely to develop hypertension. The researchers discovered a positive association between tooth loss and increased risk of hypertension, especially among younger women and those with lower BMI.
A Late Miocene ape maxilla was discovered in the Kutch basin, western India, significantly extending the southern range of ancient apes in the Indian Peninsula. The specimen, dated to around 11-10 million years ago, belongs to the Sivapithecus genus and provides new insights into human evolution.
A team of researchers at UC Davis has developed a new method to estimate the biological sex of human skeletal remains based on protein traces from teeth. This method uses sensitive mass spectrometry to measure proteins and can be used alongside existing techniques.
A 9,000-year-old child's tooth has revealed insights into Alaska's ancient people, their genetic makeup and diets. The tooth, linked to the Ancient Beringian lineage, indicates that these groups remained in Alaska for thousands of years after migrating across the Bering Land Bridge.
New research reveals that ligaments hold teeth in place, contradicting previous assumptions. Early dinosaurs like Changchunsaurus parvus had unique tooth replacement methods and wavy enamel.
A study on Changchunsaurus parvus reveals unique features in its teeth, including wavy enamel and a method of tooth replacement that allowed for continuous shearing surface formation. These findings suggest early adaptations for herbivory in this small herbivorous dinosaur.
A Rutgers University study reveals that older adults with 10-19 teeth are at higher risk for malnutrition. Patients with tooth loss or malnutrition experienced weight loss, dementia, and depression, highlighting the importance of dental clinics in identifying nutritional status issues.
A study found that children generally lose their first baby tooth at six years old, and their emotions range from joy to fear. Parents of children who lost a milk tooth reported mostly positive feelings, with those whose previous dental visits were cavity-related experiencing fewer positive emotions.
Researchers discovered that 80% of adult remains showed evidence of tooth decay and over half were missing teeth. The study found pipe smoking marks on many of the skeletons, suggesting that smoking was a major contributing factor to poor oral health in this population.
A newly discovered Tylosaurus fossil, likely a newborn, lacks the characteristic long snout of the species. Researchers found that the development of this feature occurs extremely quickly, between birth and juvenile stage.
A recent grant from the National Institute of Dental and Craniofacial Research will support a study characterizing the oral microbiome in children with HIV infection. The study aims to understand how HIV affects tooth decay, with potential applications for personalized medicine and improved prevention strategies.