What’s up with baby teeth? Do other animals have them, and what are they good for -- other than squeezing money out of the tooth fairy? We have the answers!
Hosted by: Hank Green
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow
Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow
Looking for SciShow elsewhere on the internet?
Thanks Tank Tumblr: http://thankstank.tumblr.com
It's not only "evolution" that made our jaw narrower but the evolution of our diets. Nowadays, what most of us from industrial countries eat is way softer than what our ancestors ate, or even the diet of some aboriginal cultures today. We cook and grind and process way too much. It's been shown that spending your childhood and teen years chewing on fibrous, tough food induces a different growth of the jaw (it also works in adults but much much slower, as their growth is over). With such a lifestyle, the jaw grows wider and wisdom teeth fit perfectly. Your lifestyle and diet affect the shape of your face.
A similar adaptation of the skull to the lifestyle can also be observed in domestic pigs that escape and go back to a wild lifestyle, where they have to use their snout a lot to dig. Their snout straightens over time due to the repeated pressure, to eventually resemble that of a boar.
If our mouths didn't get smaller, wisdom teeth would be helpful because of all the meat with bones would break our teeth and we would have no teeth, so we would grow new ones. But all the processed foods don't break our teeth as much, so wisdom teeth are a waste of space.
I was terrified of wobbly teeth because I was afraid that I would swallow them while sleeping... and then I wouldn't tell my parents about it because both my parents are dentists and they always joked about pulling my teeth out... how fun
Why other than to balance the bite do we need to replace teeth? I think i know the answer but would like to know for sure.
What I was told it has to do with the jaw bone density. Is this true or noe and can you talk about it in a show?
One thing wrong with this video. Our jaws didnt get smaller because of evolution. The soft starchy diets that came with the agricultural revolution, didnt require a lot of chewing. Hence less developed mouth musculature and bone.
Plenty of people have their wisdom teeth, including me, and in third world countries every one has them, because of tough diets. I mean that they fit perfectly in their mouthes.
my 6 siblings and I (so i am assuming genetic) have gotten 2 sets of baby "eye" teeth, then the adult tooth. So one set pops out, falls out, then another pops out, then falls out, then the adult teeth. I am the only one of us that did not get my "3rd" set. my adult tooth. I still have a baby tooth in place. it has come loose often, but became solid and by age 28 it started to break down. No adult tooth to replace it. I was told it would not stay in my mouth past age 16. I still have it, age 25, but it is tiny, shaven down, useless. Eventually I will get it removed when I can afford a fake tooth.
Luckily we only have those baby teeth. Imagine if all our teeth had to go through falling out and teething for the first 20 or so years of our lives? yikes!
Will there be a scienctific utopia in our lifetime? Like a smart city or a city devoted to scientific discovery seperate from profiting finacially from science (like tampering with results or just caring about the bottom line finacially).
I had to have my bottom front baby teeth pulled because my adult ones came in but the baby ones hadn't fallen out. Fortunately, after that the adult ones drifted back and settled nicely into line with the rest.
Maybe you don't have adult teeth beneath your baby teeth. If you get a X-Ray at the dentist or the orthodontist, they will tell you. :)
(I'm 20, and I still have 1 or 2 baby teeth that I hope won't fall because I don't have adult teeth to remplace them.)
Deciduous teeth should still be in until will after a child stops being a toddler. 5 or 6 are the years when the first baby teeth fall out. That's not a toddler. How do I know this B.S.N. retired RN. former child care worker and mom.
I'm missing permanent teeth. Four of my teeth (the pairs next to the incisors) are baby teeth. There are no adult teeth to come in because they never developed. I am very very careful as I cannot afford dentistry. In the US it's a luxury for a lot of people. They should have fallen out a long time ago. I'm just lucky that all of my adult teeth are pretty small. So it's not too jarring to look at. But I do kind of resemble a rabbit if I open wide. There is some kind of spur under the skin inside my lower jaw. The last time I saw a dentist he said it may be an oddly placed undeveloped tooth. It doesn't bother me. The only difficulty I had was with a retainer. I guess the mold wasn't pressed down enough to go over it. So it was a little annoying at first.
I think I lost the last of my baby teeth that had permanents coming in when I was 11.
+Ashish Gupta Did you make an x-ray over them ?
If your teeth are straight and healthy you shouldn't care much about it,expecially because baby teeth have thicker enamel,and are even more bright than adult teeth.
Both me and my dad still have all of our wisdom teeth (I have 3, I don't have a 4th lower left wisdom tooth). My dentist told me that if they're not causing problems or pain and grow in relatively straight then you're fine. So really you should hope that the ones you may or may not get grow in straight. (Though getting sores in the back of your mouth sucks when they first come in!)
It's kinda weird, I have 28 teeth and I'm 13, yet I never remember losing my molars. I am kinda small for my age, so maybe my mouth it small enough so that I don't have to lose teeth because my mouth isn't growing (yet)
+Turkey Herder I got an embedded one too. I can feel my lower right wisdom tooth under the gum but it hasn't erupted at all. And I don't have a lower left wisdom tooth at all...
The two top ones erupted fine and straight though.
I've always hypothesized that wisdom teeth wouldn't have been a problem even after our jaws shrunk due evolution because I'd imagine by the time most humans were 20, they would have lost a few teeth. In that would it would almost be like, congratulations on making it to 20, you get a bonus set of teeth since your other's are likely in terrible condition.
wisom teeth don't make a good replacement for other teeth.
you must have noticed by now that you have way more strength biting down with your molars, than with your other teeth, this is because they are further back and that is how leavers work.
the problem with this is that wisdom teeth grow out so far back, that your jaw muscles can generate enough force to crack them, eve nmy accident.
i fortunately do have enough space in my jaws to fit my wisdom teeth in and i have managed to break big chunks out of three of them.
also no people didn't die arround 25 very often, that is a myth based on people not understanding how statistics work.
the average life expectancy back then was so low because of extremely high infant mortality rates, anyone who lived to 25 could comfortably live another 25 years, without having to fear death arround every corner.
Ciccarello that is actually a very interesting hypothesis, especially since we are given so many molars and their purpose is to grind things up, which isn't the most gentle action on your teeth, and before modern dentistry that was probably the only good teeth left.
I had braces and no longer have the gap, and I do live in America! It was pretty expensive, but no one notices that I'm missing a tooth unless I point it out, and it doesn't affect my life that much, if at all.
Well that sucks,I hope you don't live in Murica'.Here in Romania dental care is cheap.a girl in my class had the same problem as you.4 of her front adult teeth didn't have roots,so they weren't stable and had to be pulled out.Since it was symmetrical she got braces,so the molars got moved a bit further.Go to a dentist and ask for braces too,they will move your teeth further a bit,so there will be no gap.Here teeth are straight and realy beautyful,I didn't even notice(and still can't make a difference) until we talked about it.
all I could do was use what the dermatologist gave me, stay on routine, and wait it out. I had severe cystic acne that kept gettin worse until about four months ago I noticed that I was only getting 4-5 cystic bumps at a time, now I'm down to 2-4. if I had stuck with my routine instead of quitting a year or so ago I'm sure it would've cleared up faster
The class of drugs that Levitra, Viagra, Stendra, and Cialis belong to are called PDE5 inhibitors. They work by relaxing tight blood vessels, allowing more blood to surge into the penis and cause an erection, says Gregory Bales, M.D., an associate professor of urology at the University of Chicago.
The little pills do the trick for more than two-thirds of men with Viagra protects the heart (ED). They also work for guys who simply need them for a short time to get their “confidence back,” says Michael Eisenberg, M.D., director of male reproductive medicine and surgery at Stanford University.