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    The top worst food for your teeth:

    Last updated 22 days ago

    The American Dental Association named the top worst food for your teeth:

    Hard Candies

    They may seem harmless, but eat too many and the constant exposure to sugar can be harmful to your teeth. Hard candies also put your teeth at risk because, in addition to being full of sugar, they can also trigger a dental emergency such as a broken or chipped tooth. Better alternative? Chew sugarless gum that carries the ADA Seal.
     
    Ice
    Use it for chilling, not chewing.  You'd be surprised at how many people think ice is good for their teeth. It's made of water, after all, and doesn't contain any sugar or other additives. But chewing on hard substances can leave your teeth vulnerable to a dental emergency and damage enamel. Advice: Break the habit and enjoy water in its liquid form.
     
     
    Citrus
    The truth is that frequent exposures to acidic foods can erode enamel, making teeth more susceptible to decay over time.  So, even though a squeeze of lemon or lime can turn a simple glass of water into a fun beverage, it's not always the best choice for your mouth.  Citric fruits and juices can also irritate mouth sores.  Make sure to drink plenty of plain water. 
     
     
    Coffee
    In their natural form, coffee and tea can be healthy beverage choices. Unfortunately too many people can't resist adding sugar. Caffeinated coffee and tea can also dry out your mouth. Frequent drinks of coffee and tea may also stain your teeth. If you do consume, make sure to drink plenty of water and try to keep the add-ons to a minimum.
     
     
    Sticky foods
    When it comes to picking healthy snacks, many people put dried fruit at the top of the list. But many dried fruits are sticky. Sticky foods can damage your teeth since they tend to stay on the teeth longer than other types of food. If you find yourself eating dried fruits or trail mix often, make sure to rinse with water after and to brush and floss carefully.
     
    Things That Go "Crunch"
    Who doesn't love the nice, satisfying crunch of a potato chip? Unfortunately, potato chips are filled with starch, which tends to get trapped in your teeth. If you choose to indulge in snacks like these, take extra care when you floss that day to remove all the food particles that can lead to plaque build-up.
     
     
    Soda
    When you eat sugary foods or sip sugary drinks for long periods of time, plaque bacteria use that sugar to produce acids that attack your enamel, the hard surface of your tooth. Most carbonated soft drinks, including diet soda, are acidic and, therefore, bad for your teeth. Caffeinated beverages, such as colas can also dry out your mouth. If you do consume soft drinks, try to drink alongside a cup of water.
     
     
    Alcohol
    Alcohol causes dehydration and dry mouth. People who drink excessively may find their saliva flow is reduced over time, which can lead to tooth decay and other oral infections such as gum disease. Heavy alcohol use also increases your risk of mouth cancer.
     
     
    Sports Drinks 
    They sound healthy, don't they? But for many sports and energy drinks, sugar is a top ingredient. According to the American Academy of Pediatrics, while sports drinks can be helpful for young athletes engaged in prolonged, vigorous physical activities, in most cases they are unnecessary. Before your next sip, check the label to make sure your drink of choice is low in sugar. Not sure? Drink water instead!

     

     

     

    A terrifying 'prehistoric' frilled shark with 300 teeth captured in Australia

    Last updated 1 month ago

    Speaking of having too many teeth...
     
      What has 300 teeth, lives 1,300 feet below sea level and has ancestors that date back 80 million years?  The answer is the frilled shark. And this “living fossil” was caught last month in waters off Victoria, Australia.  “I’ve been at sea for 30 years and I’ve never seen a shark look like that,” skipper David Guillot told Fairfax Radio on Wednesday.
     
      The Sydney Morning Herald reported Guillot found the creature while fishing near Lakes Entrance in southeastern Victoria. Guillot continued: “The head on it was like something out of a horror movie. It was quite horrific looking. … It was quite scary actually.”
     
      At about 6 feet in length, it’s not among the largest sharks in the seas. It looks more like an eel. But it’s got many more teeth than most sharks, 25 rows of them for a total of 300. By contrast, the great white shark has 50 teeth.
     
      The shark was offered to the Commonwealth Scientific and Industrial Research Organization, but was declined because they already had a specimen. Simon Boag, from the South East Trawl Fishing Association told ABC: “We couldn’t find a fisherman who had ever seen one before. … It looks prehistoric, it looks like it’s from another time.”
     
      So it's probably just best to stay clear of Australia's SE Victoria area.

    80 Teeth Removed From 7-Year-Old Indian Boy

    Last updated 1 month ago

    For most people with a normal smile, the 32 teeth they are given are hard enough to keep healthy. But one boy in India had a whopping 80 teeth grow in, which he then had to get removed. The seven year old from Mumbai had the surgery on December 26th, 2014.


    The boy was brought into Maharaja Yeshwantrao hospital to be treated for painful abscesses in his upper jaw. The father was initially worried it could be a cancerous tumor. When x-rays were performed the doctors noticed an excessive amount of dental tissue grown in the upper jaw, and they diagnosed the boy with odontoma. Odontoma is a rare but benign tumor made up of dental tissue growing in the gum or jaw. The International Business Times reported that the doctors ended up extracting 80 teeth from the boy's small 5x3.5cm abscess during a four hour operation. Truly a huge number, but not as many as a July 2014 operation which resulted in 232 teeth being taken out of 17 year old Ashik Gavai, who had the same condition.

    Dr Dhivare-Palwankar, head of dentistry of JJ Hospital were Gavai was treated commented that the number of removed teeth could very well likely been a world record.
    Source:

    http://yourhealth.asiaone.com/content/80-teeth-removed-7-year-old-indian-boy

    Dentists debate need to extract wisdom teeth

    Last updated 1 month ago

    Wisdom teeth or "third molars" are up to 4 hind teeth that usually come in during the late teens or early twenties (age 17-25). Removing them is often a regular part of growing up. But more and more people are starting to question if its always necessary. Wisdom teeth grow through the gums only partially, because there usually is not enough room in the jaw so they are considered "impacted" and can thus decay and cause plaque problems. Those who oppose sometimes say watching and waiting is best to see if the incoming teeth will cause a problem. Consulting a professional for x rays is also advised. As sometimes the wisdom teeth do no damage to the surrounding teeth and gum tissue. Americans spend about $3 billion a year removing wisdom teeth according to the American Public Health Association. The biggest predictability of having the procedure done is the "availability of insurance" says an APHA survey. "When dentists recommended removal, 55% of participants adhered to this recommendation during follow-up, and the main reason was availability of insurance (88%)," the survey states. To extract the wisdom teeth, depending on procedure complexity, position and where you live insured people might pay $300-600 on average per tooth according to to Jay Friedman a Dentist and consultant in Los Angeles who analyzed a survey of fees from the American Dental Association. "A person with good dental insurance might have to pay 20% of the fee out-of-pocket, as much as $320 to $500 for four wisdom tooth extractions," Friedman also added. Based on research from 2014 about 80% of dental extractions were for wisdom teeth. As in every surgery, including the most routine, there are risks. When doing the procedure you should know the benefits. If the tooth is not diseased it may be okay to leave it in. Most widom teeth extraction are done with a local anesthetic, with which the patient is awake and able to communicate with the doctor. A general anesthetic, leaves the patient unconscious is used too often and costs more, according to Friedman. "They [oral surgeons] like to give general anesthetic. It's a big money maker. You're making a lot of money giving general anesthesia or I-V sedation, even though you don't need it," says Friedman, adding that he has often removed wisdom teeth with a local anesthetic, such as Novocain. He adds most surgeons prefer local anesthetic as it is easier to work with. The one risk, he says, is if the mouth opens to wide, causing damage. As well as the possibility of nerve injury. For those who keep wisdom teeth, it is advised to be monitored closely by your dentist and yourself. So why did humans develop wisdom teeth? Scientists theorize early humans once put their wisdom teeth to good use, their diet being mainly roots, tough meat and raw food. The hard to eat food meant the human jaw had to work much harder to break down foods to swallow. And extra teeth helped complete this task. Scientists also believe at one time the human jaw was larger, allowing the wisdom teeth to grow in without problem. Source: http://www.latimes.com/health/la-he-wisdom-teeth-20150103-story.html

    Why Birds Don't Have Teeth

    Last updated 2 months ago

    Birds  like anteaters, baleen whales and turtles don't have teeth. But this wasn't always the case. The common ancestor of all living birds sported a set of pearly whites 116 million years ago, a new study finds.

    In the study, researchers looked at the mutated remains of tooth genes in modern birds to figure out when birds developed "edentulism" an absence of teeth. Ancient birds have left only a fragmented fossil record, but studying the genes of modern birds can help clarify how the bird lineage has changed over time. "DNA from the crypt is a powerful tool for unlocking secrets of evolutionary history," Mark Springer, a professor of biology at the University of California, Riverside and one of the study's lead researchers, said in a statement.

    Modern birds have curved beaks and a hearty digestive tract that help them grind and process food. But the 1861 finding of the fossil bird Archaeopteryx in Germany suggested that birds descended from toothed reptile ancestors, Springer said. And scientists now know that birds evolved from theropod dinosaurs, carnivorous beasts such as Tyrannosaurus rex, which had a mouth full of sharp teeth. But no one knew exactly what happened to the teeth in the evolution of these animals from then until now.

    "The history of tooth loss in the ancestry of modern birds has remained elusive for more than 150 years," Springer said. [8 Foods for Healthy Teeth] In the new study, the researchers wondered whether the bird lineage lost its teeth in a single event, meaning the common ancestor of all birds did not have teeth, or whether edentulism happened independently, in different lines of birds throughout history, the researchers said. To find out, they investigated the genes that govern tooth production. In vertebrates, tooth formation involves six genes that are crucial for the formation of enamel (the hard tissue that coats teeth) and dentin (the calcified stuff underneath it). The researchers looked for mutations that might inactivate these six genes in the genomes of 48 bird species, which represent almost every order of living birds. A mutation in dentin- and enamel-related genes that was shared among bird species would indicate that their common ancestor had lost the ability to form teeth, the researchers said. They found that all of the bird species had the same mutations in dentin- and enamel-related genes. "The presence of several inactivating mutations that are shared by all 48 bird species suggests that the outer enamel covering of teeth was lost around 116 million years ago," Springer said.

    The researchers also found mutations in the in the enamel and dentin genes of other vertebrates that don't have teeth or enamel, including turtles, armadillos, sloths, aardvarks and pangolins, which look like scaly anteaters. The closest living modern reptile relative of birds is the alligator, Springer said. "All six genes are functional in the American alligator," Springer said.

    Links

    Why Birds Don't Have Teeth

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