All articles tagged with #teeth
Palaeontologists in South Australia uncovered 25-million-year-old adult platypus fossils with teeth, including molars and premolars, extending the dental record by about 8 million years. Findings from Frome Downs and Billeroo Creek suggest a crunchier diet featuring crayfish and molluscs and a forelimb similar to modern platypuses, indicating strong swimming in a lush ancient environment.
During the Miss Grand Thailand prelim, 18-year-old Kamolwan Chanago’s dental veneers popped out mid‑speech. She calmly popped them back in and continued, turning a potentially awkward moment into a display of poise that sparked lighthearted jokes and admiration for her composure.
New Jersey Devils star Jack Hughes, famous for his mangled grin from Team USA’s Olympic gold game, teases fixing his teeth and even hints at a removable option, while noting the smile has become an iconic part of his image.
Researchers examined nearly 100 great white sharks and found that tooth shape changes dramatically along the jaw and as sharks grow. Juvenile teeth are slim with cusplets for gripping small prey; around 3 meters in length they become broader, thicker, and serrated, while cusplets disappear. Lower teeth grab and hold prey, upper teeth slice and dismember, forming a coordinated feeding system. Teeth are constantly replaced, letting the bite reflect a shark’s dietary shift from fish and squid to marine mammals as it matures; the study provides a jaw-wide view of dental evolution across development.
A study of nearly 100 great white sharks shows their teeth change across the jaw and as they grow: juvenile teeth are slender with cusplets for gripping small prey, but around 3 meters they shed cusplets and develop broader, serrated teeth for slicing; the front teeth are thicker ‘impact’ teeth while upper and lower teeth specialize for slicing and gripping, enabling larger sharks to target marine mammals. Continuous tooth replacement acts like a living record of lifestyle and diet changes, highlighting how the shark’s feeding toolkit adapts across life stages.
A study of 190,282 older adults found that having more sound or filled teeth correlates with lower all-cause mortality, while missing or decayed teeth increase risk. The total of sound and filled teeth predicted mortality better than simply counting sound teeth or including decayed/missing teeth. The researchers suggest that tooth condition influences mortality via inflammation and nutrition, and advocate further research on how oral health affects longevity.
Stem cell research has identified two types of cells that could potentially lead to the regeneration of teeth and bone, representing a significant breakthrough in regenerative medicine.
Teeth and bones are both hard, mineral-rich tissues, but they differ significantly in function, structure, and living tissue status. Teeth are primarily for digestion and speech, made of enamel, dentin, and pulp, and are non-living tissue once formed. Bones support the body, protect organs, and are living tissues that constantly remodel through blood vessels and cells, which teeth do not have. These differences explain why teeth are not classified as bones.
Scientists discovered that the ratfish, a primitive fish, has a unique appendage called a tenaculum with true teeth outside its head, challenging traditional views on tooth placement and suggesting more flexible dental systems in vertebrates.
Scientists discovered that male ratfish use a unique, tooth-lined, club-shaped appendage on their forehead called a tenaculum to cling to females during mating, challenging previous assumptions that it was covered in scales and revealing new insights into vertebrate teeth development and evolution.
Researchers discovered that male spotted ratfish have a unique forehead appendage called the tenaculum, covered in real teeth rooted in a dental lamina, used during mating. This finding challenges the traditional view that teeth are only oral structures and provides new insights into the evolution of teeth in vertebrates.
A new study reveals that male spotted ratfish, also known as 'ghost sharks,' grow teeth on a structure called the tenaculum outside their mouths, challenging previous assumptions that teeth are only oral structures. This discovery provides insights into the evolution of dental tissues and highlights the diversity of tooth development in vertebrates.
Research suggests that the increase in crooked teeth among modern humans may be linked to dietary changes from tough, raw foods to softer, processed foods, leading to smaller jaws and less space for teeth, although genetics and societal factors also play roles.
Some common 'healthy' habits like drinking energy drinks, eating dried fruit, consuming green smoothies, and sleeping poorly can actually damage your teeth by causing enamel erosion and increasing cavity risk, according to dentists. It’s important to be mindful of these habits to maintain long-term dental health.
Dental experts highlight the significant impact food can have on dental health, identifying three of the worst foods for your teeth and offering tips on how to protect them from damage.