Articles tagged with Teeth
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 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.
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.
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.
Researchers have created a new material combining nanodiamonds, gutta-percha, and amoxicillin to strengthen root canal fillings and kill bacteria. The material shows promise in preventing re-infections and improving current therapies.
Researchers studying Lake Malawi cichlids and mice aim to understand how fish regenerate teeth and develop new teeth in humans. The study reveals potential genetic pathways for tooth regeneration in humans, but more research is needed to make it viable.
Researchers developed a new material fortified with nanodiamonds that can combat bacterial infections in teeth. The nanodiamond-enhanced gutta percha showed promise in preventing residual infection and promoting healthy tooth regeneration.
A team of ETH Zurich researchers has created a biomimetic dental prosthesis that replicates the structure and properties of teeth and seashells. The material, produced using magnetically assisted slip casting, exhibits improved durability and complexity, with potential applications in dentistry and beyond.
Researchers developed coated silica nanoparticles that can deliver calcium-based compounds and antimicrobials into damaged teeth through microscopic holes. The particles overcome previous aggregation issues, showing promise for restorative treatment of sensitive teeth.
Scientists have discovered that the shift from a tree-based diet to one based on grass occurred around 3.8 million years ago, allowing early humans to be more mobile and adaptable. This finding provides new insights into the interactions between morphology and behavior among Pliocene primates.
A new study reveals that smokers are up to 3.6 times more likely to lose their teeth, with male smokers being the most affected. Quitting smoking can reduce this risk, although it may take over a decade for ex-smokers to regain the same level of dental health as non-smokers.
A study by Professor Elizabeth Kay found that supervised tooth brushing and fluoride varnish schemes are cost-effective options for preventing tooth decay in high-risk children. The schemes can save the NHS hundreds of pounds per child compared to surgical treatments, making them an economically viable solution.
A new study reveals that the distinctive, saw-like tooth structure of theropod dinosaurs enabled them to effectively process food, contributing to their success as predators. The discovery sheds light on the evolution of dinosaur dentition and has implications for our understanding of these ancient creatures.
A study of ancient dental plaque found in Qesem Cave, Israel, reveals that early Palaeolithic humans ate a diverse diet rich in nuts and seeds. The discovery also suggests that these ancient humans had knowledge of local ecology and were able to manage smoke from fire using internal hearths.
A new study by Case Western Reserve University School of Dental Medicine researchers found that dental implants result in higher overall satisfaction among postmenopausal women with osteoporosis. Women with dental implants reported the highest satisfaction in emotional and sexual areas, while those without restorations scored lower.
Researchers have discovered that the mineral particles in dentin are precompressed, which helps prevent cracks from developing and increases resistance to damage. This natural mechanism may inspire the development of tougher ceramic structures for tooth repair or replacement.
A study published in Chemical Communications suggests that a natural plant chemical called trans-chalcone can help prevent tooth decay. By blocking the action of an enzyme that allows bacteria to thrive, researchers found that trans-chalcone prevents the formation of plaque and biofilms around teeth.
Researchers analyzed 3,550 North American rodent fossils to show how fundamental evolutionary mechanisms drive the emergence of novel mammalian stem cells. The study found that most extinct species can acquire continuously growing molars through evolution, and the final developmental step is surprisingly simple.
Scientists have isolated dental stem cell lines and identified a natural mechanism for repairing tooth lesions. The study reveals that dopamine and serotonin play a crucial role in recruiting stem cells, which then repair the tooth. This breakthrough discovery opens up new therapeutic strategies to mobilize resident dental stem cells.
Researchers develop a novel way to apply drugs to dental plaque using nanoparticles that release antibacterial agents in response to acidic environments. This innovation has shown promising results in reducing the severity of cavities and promoting better oral health.
A new review of 5,903 participants found limited evidence supporting xylitol's ability to prevent tooth decay, particularly with fluoride toothpastes. The review concluded that xylitol-containing products showed little to no benefit in preventing dental cavities.
A recent study reveals a significant association between hair disorders and susceptibility to dental caries. The research found that polymorphisms in hair keratins are associated with increased risk of dental defects and caries, highlighting the importance of keratin components in tooth enamel structure.
A new study reveals that early modern humans relied heavily on the rainforest for their diet, contradicting the long-held assumption that they avoided tropical forests until around 12,000 years ago. The research analyzed teeth dating back 20,000 years and found that nearly all individuals had a diet sourced from the rainforest.
Industry documents reveal close ties between sugar industry and NIH in developing research approaches focused on alternatives to reducing tooth decay. Analysis found that sugar industry priorities influenced the 1971 National Caries Program's research proposals.
Researchers found that Neanderthals, like modern hunter-gatherer societies, showed a sexual division of labor. Female fossils showed longer dental grooves than male individuals, suggesting different tasks were performed. The study also found differences in teeth enamel imperfections between males and females.
Researchers discovered beaver teeth have a harder, more resistant form of enamel built with iron that surpasses fluoride-treated enamel in acid resistance. This finding could lead to better understanding of human tooth decay and improvement on current treatments.
Recent studies of Mesozoic mammals in China reveal a diverse range of species, with many exhibiting mammalian characteristics. The findings provide insights into the evolution of the mammalian middle ear and the origin of mammals, with implications for our understanding of vertebrate biology.
A new behavioral intervention aims to change caregivers' perceptions about oral health, encouraging them to seek dental care for their children. The study, funded by National Institute of Dental and Craniofacial Research, will test a referral letter and educational materials to improve the oral health of children nationally.
Scientists developed a novel paste based on calcium and phosphorus to address tooth sensitivity, which can lead to more serious dental problems. The new material plugs exposed tubes more deeply than other treatments, providing longer-lasting relief.
Adults who lose all their teeth show significant declines in memory and walking speeds compared to those with some teeth. The association between tooth loss and decline remains after adjusting for various factors.
A research team has found that tooth loss in birds occurred convergently with turtles and multiple mammalian lineages about 116 million years ago. The study used degraded remnants of tooth genes to determine when birds lost their teeth, suggesting a single loss of mineralized teeth in the common ancestor of all modern birds.
A study of over 2,700 Australians found that many people with tooth loss do not need dentures as long as they have a sufficient number and type of remaining teeth. The researchers suggest allocating resources to prevent further tooth loss, diagnostic services, and follow-up care instead.
Research reveals that human incisors grow quickly in the second trimester of fetal development, allowing them to erupt at six months. This rapid growth is thought to be an adaptation for early weaning, as it enables babies to transition from breast milk to solid foods sooner.
A new vaccine is being developed to prevent canine gum disease, a common condition that affects most dogs by three years of age. The vaccine targets the most common types of bacteria causing periodontal disease in dogs.
Researchers at UC San Diego School of Medicine implicated a new gene in non-syndromic autism, suggesting similar molecular pathways among different types of autism. The study used mouse models, induced pluripotent stem cells and the 'Tooth Fairy' project to identify TRPC6 as a novel predisposing gene for ASD.
A new study published in the Journal of Clinical Investigation has found a significant link between hair keratin mutations and an increased risk of dental decay. Individuals with mutations in hair keratin genes are prone to cavities, with abnormal tooth enamel structures contributing to weakness.
A survey of UK veterinary students found that over 50% lacked confidence in discussing oral health with clients. To address this, a two-part special issue of the Journal of Feline Medicine and Surgery is dedicated to feline dentistry, featuring expert articles on examination techniques, periodontal disease, and anaesthetic protocols.
Poor oral health in elite athletes shows no signs of improvement and must be remedied. Experts recommend simple measures like better brushing and flossing can provide marginal performance gains similar to expensive physical therapies.
Paleontologists discover a tooth embedded in a rauisuchid's bone, showing phytosaurs targeted both aquatic and terrestrial prey. The find provides evidence for the interaction between these two top predators on land and sea, forcing a reevaluation of ancient ecosystems.
Scientists have discovered that a single genetic change in the Bmp6 gene is associated with an increase in tooth number in freshwater sticklebacks, which can lead to cleft palate deformities. The study suggests that regulating this gene may hold the key to replacing human teeth and improving tooth formation.
Research from University College London suggests reducing sugar consumption to 3% of total energy intake can significantly reduce tooth decay. Experts recommend policy changes to address the issue, including taxing sugar-rich foods and drinks.
The discovery of three new extinct squirrel-like species confirms that mammals originated at least 208 million years ago in the late Triassic period. The findings support earlier research suggesting a common ancestor for mammals existed during this time, and provide new insights into ancient mammalian evolution.
A new study projects a continued decline in US edentulism prevalence through 2050, with high-income households experiencing the steepest reduction. However, tooth loss remains disproportionately prevalent among low-income populations, highlighting a need for targeted public health measures to address this issue.
Researchers at the University of Adelaide found that acidity from soft drinks and fruit juice can cause lifelong damage to young people's teeth within 30 seconds. Parents are advised to limit their children's consumption of acidic beverages to prevent long-term dental issues.
A University of Florida study found that trace amounts of lead in human teeth can provide clues about a person's geographic origin. The discovery could help law enforcement solve cold cases by focusing investigations on specific regions based on the type and amount of lead isotopes present.
A UC research study reveals that mammoths and mastodons were likely year-round residents of the Cincinnati region, with distinct diets and habitats. The findings suggest a greater understanding of these prehistoric creatures' behaviors, which could inform modern-day elephant conservation efforts.
A massive tooth fossil of the prehistoric marine predator Dakosaurus maximus has been discovered in Dorset, UK. The tooth, measuring approximately 5.5 cm long, is believed to have belonged to a creature that swam alongside killer whales and ate large fish whole.
A new study published in the Journal of Human Evolution identifies two genes that show evidence of positive selection in humans, contributing to the thickening of enamel. The research suggests that natural selection played a key role in shaping human teeth, with specific genetic changes linked to diet and environmental pressures.
A large study found that periodontal disorders such as tooth loss and gingivitis are associated with numerous cardiovascular risk factors. Patients with more teeth had lower levels of CVD risk factors, including diabetes and smoking.
A nationwide survey found a strong association between tooth loss and depression, as well as anxiety. The study, which analyzed data from over 451,000 respondents, revealed that individuals with depression or anxiety were more likely to experience tooth loss, with adjusted odds ratios of 1.16 for depression and 1.23 for anxiety.
Researchers found that immigrants formed a sizable portion of Cahokia's population, contradicting traditional models of Native American groups. The analysis used strontium isotope ratios in teeth to determine the location of origin for individuals buried at the site.
A study by Mayo Clinic researchers found that patients who had troublesome teeth extracted before heart surgery were at a higher risk of poor outcomes, including death. The study suggested that physicians should evaluate each patient individually to weigh the benefits and risks of tooth extraction before cardiac surgery.