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zakruti.com » Knowledge, science, education » TED-Ed
Why do we have crooked teeth when our ancestors didn t? - G. Richard Scott

Why do we have crooked teeth when our ancestors didn t? - G. Richard Scott

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Explore the prevailing scientific theory of why crooked teeth and impacted wisdom teeth are recent developments in human evolution. According to the fossil record, ancient humans usually had straight teeth, complete with wisdom teeth. In fact, the dental dilemmas that fuel the demand for braces and wisdom teeth extractions today appear to be recent developments. So, what happened? While it s nearly impossible to know for sure, scientists have a hypothesis. G. Richard Scott shares the prevailing theory on crooked teeth.
Date: 2023-05-03

Comments and reviews: 15


I needed jaw surgery to move my upper jaw forward a bit, while adding metal to widen it a tiny bit so all my teeth could be straightened.
I think it was an excessive underbite that caused all my dental issues. Started work on my teeth at 11 (back then my dentist did tell me that I would eventually need surgery when I was 21.
Ten years of pain. It came to a point where I got used to all the aching, as my braces needed to be tightened a lot.
Was it worth it? Yeah. My teeth are really straight now. But, the only gripe I have is that when I sometimes eat and have conversations with other people at the same time, I m liable to bit into the inside of my mouth. And I mean really bite into the flesh, until it bleeds. I think it s like muscle memory, my brain sometimes thinks my teeth and jaw are the same pre-surgery and orthodontic work jaw and teeth. Still happens often after 10 years.

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I have no scientific evidence to back this up, just my own experience. I wonder if some people are getting braces too early, before they have a chance to grow into their teeth? Growing up poor in the early 90s, my mom took my sister and I to an orthodontist when we were pre-teens. They said we should both get braces right away. My parents couldn't afford it, and we just kept an eye on things. My teeth are mostly straight. I have one tooth that is slightly crooked, but it doesn't cause me any issues and I don't mind how it looks. I had wisdom teeth out at 24, but no real dental problems. I have 3 siblings, none of us had braces and we all had reasonably straight, uncrowded teeth and generally pain-free mouths. Maybe we're lucky genetically? The orthodontist didn't seem to think so!
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Looks like eating red delicious apples like candy did me a huge favor for my teeth because I dodged the braces bullet growing up. My older brother didn't munch on apples as much as I did and he had to have braces, although he never had a cavity and I had a handful growing up. They kinda break even, I guess. I guess an apple a day really does keep the doctor away, just not medical doctors, but rather orthodontists whom we address as doctors, although the high fiber in apples meant I seldom had stomach-related bugs.
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Woahh this timing is blowing my mind
My sister just had her upper wisdom tooth removed last week and x-ray reports showed that her lower wisdom tooth were growing horizontally inside the gum, which caused immense pain all of a sudden. Surgery in the next week to remove them. My mom then explained this theory of how our facial structure, since a few generations, had been changing and kind of shrinking in the jawline, causing all this to happen.

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Its because of the introduction of grains, sugary and processed foods. Go read Dr. Price's book, he shows how in indigenous tribes have perfect dental arches and straight teeth, yet when they switch to a western diet, their teeth misalign. It's the same reason your teeth can misalign again after having braces. How could that even be possible? It's because the diet never changed which caused the misalignment in the first place
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My tooth are perfect but I still choose to remove my wisdom teeth. You see the Army gives you three days of recovery when your wisdom teeth is removed. So if you remove it on a wednesday, you do not have to show up to work until Monday. I removed the top ones 10 years ago. I need a break. I am going to find a good wednesday to remove the lower ones.
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All four of my wisdom teeth came in, the top two came in fine, the bottom two where impacted. One came in FULLY SIDEWAYS, never emerged from the gum, and pressed against the molar next to it in such a way it developed a huge cavity. I had to get all five of those teeth removed, and it caused me massive jaw pain because I already have an overbite.
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I'm one of those people who had straight teeth and wisdom teeth that emerged with no issues apart from a little teething pain. My family didn't believe me because most of them have had issues with their wisdom teeth crowding their mouths, but one day - boom. There they were poking through.
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My orthodontist warned me not to rest my head on my hands because the jaw is still pliable when its growing. This can cause teeth to move around. It makes sense that we only see crowding since industrialisation. A lot more kids are going through school now and get board sitting at desks.
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I have extremely messed up teeth, so bad to the point that people gasp when I open my mouth. Some are crooked, some are chipped, and I have some growing in places where they definently shouldn't be. Knowing that a caveman had better teeth than I ever will certainly feels. Interesting
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Evolution is all about trade offs. If we hadn't invented cooking of other food enhancement processes, we probably wouldn't have gotten the energy to become as smart as we are today. Those fossil skulls they showed didn't mention the increase in cranium size.
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I always wondered why the skulls that can be seen in the Paris catacombs all seemed to have perfect teeth. I asked a dentist who said that our current diet is bad for our teeth. But I think he was referring more to sugar that to hardness and softness.
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umm ok - Informal poll about wisdom teeth: (as above) what about if you NEVER had them?
this comment if you still have them.
Reply if you had them taken out
(I have a crowded teeth - just a few - i think smile pretty straight even with them)

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important to consider also is rise of allergies? pollution) causing blocked noses and mouth breathing during growth years and also the decrease in breastfeeding and length of breastfeeding in 'developed' nations which correlates with smaller mouths
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At least there is a more scientific understanding of what causes these issues. When I was a child, I remember an orthodontist at the time claiming that it was the mixture of different racial groups that led to crooked teeth and other dental problems.
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