News tagged with tooth

Tooth loss linked to slowing mind and body

The memory and walking speeds of adults who have lost all of their teeth decline more rapidly than in those who still have some of their own teeth, finds new UCL research.

23 hours ago
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Survey of toddlers' teeth shows ticking time bomb

The first ever survey of oral health in three-year-olds in England has been conducted by Public Health England, which released its report this week. It made shocking reading – some 12 per cent of toddlers ...

Oct 06, 2014
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Combatting periodontal pathogens

A total 12 million Germans suffer from periodontitis. If the inflammation remains untreated, this could lead to tooth loss. However, it is also suspected of triggering many other diseases, like cardiopulmonary ...

Oct 01, 2014
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Top 5 back-to-school tips for your oral health

It's that time of year again: back-to-school and back to the books. While you're busy buying your texts at the Dal Bookstore and getting organized for (and, sometimes, stressed out about) your classes, your ...

Sep 12, 2014
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Pediatricians offer new dental recommendations

(HealthDay)—All children should start using toothpaste with fluoride when their teeth appear, regardless of their risk level for cavities, according to new recommendations from the American Academy of Pediatrics ...

Aug 25, 2014
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Encouraging teeth to self-repair

Dentists could soon be giving your teeth a mild 'time warp' to encourage them to self-repair, thanks to a new device being developed by dental researchers. Reminova Ltd, a new spin-out company from King's ...

Jun 16, 2014
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Tooth

Teeth (singular tooth) are small whitish structures found in the jaws (or mouths) of many vertebrates that are used to tear, scrape, and chew food. Some animals, particularly carnivores, also use teeth for hunting or defense. The roots of teeth are covered by gums. Teeth are not made of bone, but rather of tissues of varying density and hardness.

Teeth are among the most distinctive (and long-lasting) features of mammal species. Paleontologists use teeth to identify fossil species and determine their relationships. The shape of the animal's teeth are related to its diet. For example, plant matter is hard to digest, so herbivores have many molars for chewing. Carnivores, on the other hand, need canines to kill prey and to tear meat.

Mammals are diphyodont, meaning that they develop two sets of teeth. In humans, the first set (the "baby," "milk," "primary" or "deciduous" set) normally starts to appear at about six months of age, although some babies are born with one or more visible teeth, known as neonatal teeth. Normal tooth eruption at about six months is known as teething and can be painful.

Some animals develop only one set of teeth (monophyodont) while others develop many sets (polyphyodont). Sharks, for example, grow a new set of teeth every two weeks to replace worn teeth. Rodent incisors grow and wear away continually through gnawing, maintaining relatively constant length. Many rodents such as voles (but not mice) and guinea pigs, as well as rabbits, have continuously growing molars in addition to incisors.

This text uses material from Wikipedia licensed under CC BY-SA