Tag

Teeth

All articles tagged with #teeth

science1 month ago•6 min saved

Great White Sharks Reveal a Lifetime of Teeth Transformation

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.

via ScienceAlert|

#feeding-ecology #great-white-shark #ontogeny

science1 month ago•11 min saved

Great whites grow bone-cutting teeth with age, revealing a lifelong dietary shift

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.

via The Conversation|

#diet-shift #evolution #great-white-sharks

health1 month ago•3 min saved

Healthy Teeth, Longer Life? Study Links Oral Health to Mortality Risk

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.

via ScienceAlert|

#aging #health #inflammation

science3 months ago•0 min saved

Stem Cell Breakthroughs Promise Regeneration of Teeth and Bone

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.

via bgr.com|

#bone #medical-advances #regeneration

science4 months ago•4 min saved

Are Teeth Considered Bones?

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.

via Live Science|

#bones #dental-health #function

science5 months ago•4 min saved

Ghost Sharks' Unique Forehead Teeth Used in Mating

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.

via Defector|

#evolution #fossil-record #ratfish

science5 months ago•4 min saved

Ratfish's Unique Forehead Teeth Aid in Mating

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.

via CBC|

#deepsea-creature #evolution #mating

science5 months ago•3 min saved

Ghost Sharks with Forehead Teeth: The Bizarre Fish of Washington

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.

via Gizmodo|

#deep-sea #evolution #fish

science5 months ago•4 min saved

Ghost Sharks' Forehead Teeth Aid in Mating

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.

via BBC Wildlife Magazine|

#dental-structures #evolution #marine-biology

health7 months ago•4 min saved

The Evolution of Human Teeth: Why They Became Less Straight

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.

via National Geographic|

#dental-health #diet #evolution

health9 months ago•3 min saved

Dentist Warns Common Habits That Damage Your Teeth

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.

via Daily Mail|

#dental-health #diet #enamel-erosion

health1 year ago

"Top Tips to Enjoy Sweets Without Damaging Your Teeth"

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.

via CBS News|

#dental-care #dental-health #food

animals1 year ago•2 min saved

"Adorable Baby Gorilla Shows Off New Teeth in Zoo Atlanta Video"

Zoo Atlanta shared an adorable video of baby gorilla Willie B. III trying out his new teeth by chewing on a stick, mimicking his mom's behavior. The video showcases his playful and curious nature as he explores his surroundings under the watchful eye of his mother. Baby gorillas, like human infants, spend their early years learning from their mothers and occasionally spending time with their fathers. Zoo Atlanta has been keeping followers updated on Willie's growth and progress, with viewers eagerly anticipating more heartwarming videos of his milestones.

via AOL|

#animal-behavior #animals #baby-gorilla

paleontology2 years ago•5 min saved

"Attenborough's Strange Bird: The First Toothless Fossil"

A new species of fossil bird, named Imparavis attenboroughi in honor of Sir David Attenborough, has been described as the first of its kind to evolve toothlessness. The bird belonged to a group called enantiornithines, which went extinct 66 million years ago. The discovery pushes back the timeline for toothlessness in this group by about 48 to 50 million years, challenging previous assumptions. The fossil's unique wing bones suggest it may have had strong wing beats, and its toothless beak hints at a potentially unique diet compared to other enantiornithines. The researchers also revisited a previously described fossil bird, Chiappeavis, and suggest that it too was an early toothless enantiornithine, indicating that toothlessness may not have been as unique in Early Cretaceous enantiornithines as previously thought.

via Phys.org|

#bird #evolution #fossil

arts2 years ago•2 min saved

"Feminist Awakening: 'Teeth' Takes the Stage with Lethal Bite"

Michael R. Jackson and composer Anna K. Jacobs are collaborating on a new musical adaptation of the 2007 horror film "Teeth," which explores the concept of vagina dentata. The show, currently in previews Off Broadway at Playwrights Horizons, delves into themes of sex, conservative Christianity, and feminist body horror. Jackson, drawing from his own experiences growing up in the Baptist church, resonates with the protagonist's fear of her own body and the societal pressures around sexuality.

via The New York Times|

#arts #feminist-body-horror #michael-r-jackson