Live data from Hacker News

Why didn't our ancient ancestors get cavities?

sciencenorway.no

111–120 of 207 posts

Re: Why didn't our ancient ancestors get cavities?

#111
post #105
post #83

Earlier quoted context omitted.

Also nobody mentions all the starchy stuff and the fruit our ancestors ate. It's just odd how people reinterpret the entire history of our species based on recent dietary fads.

Honestly our ancestors probably ate anything possible that was around. Probably a lot of half spoiled meat that you just ate if you came upon it and barely nutritious plant matter just to fill the belly. Surviving is insanely difficult, you don't know where your next meal is coming from, and you will take that rotting animal vs being hungry. I imagine cooking too didn't always happen. We take the logistics needed for…

Almost all of this is... Not accurate. It pains me to say it, but this reads like Hollywood fiction. Most groups of people weren't living under constant threat of starvation or violence. Groups that badly located, or that badly divided, didn't tend to last. Additionally, if you're living in high stress, births become less successful.

Things took more effort, and had slightly lower skill caps, but only slightly. Humans are still human - if things are too hard, they went elsewhere.

Re: Why didn't our ancient ancestors get cavities?

#112
post #96

Earlier quoted context omitted.

Many fruits are quite sugary, and some people probably lived in areas where they could consume fruits regularly. Also, as another commenter stated, non-sugar carbohydrates can also pose risks.

The fruits we eat today are also highly selectively-bred to be very large and sweet. Take a look at a modern banana compared to a wild-type banana [1]. Same goes for watermelon [2]. [1] https://uploads-ssl.webflow.com/5e20f576d0e9d12be5abc763/5e3... [2] https://i.insider.com/56ce1de88a45651707ff60c9?width=1190

Good point. What wild fruits are historically naturally quite sugary? I'm guessing berries (like strawberries/blueberries/raspberries) might be?

Re: Why didn't our ancient ancestors get cavities?

#113
post #37

Although this wouldn't apply to ancient humans, I have heard the hypothesis that many people in olden times didn't have as many problems with cavities because many people drank well water. And well water has naturally occurring fluoride.

It's not true that all well water has significant amounts of fluoride.

Re: Why didn't our ancient ancestors get cavities?

#114

That’s easy. Sugar.

Anecdotally, I don't consume a whole lot of refined sugar but any time I do, I can feel the plaque building up almost immediately. But at least in terms of apples and grapes this isn't the case, nor does it appear to be so with complex carbs including bread and potatoes. Additionally I've noticed most candies and soda tend to leave residual taste in my mouth for hours. So I'm partial to pointing the finger specifical…

I think you mean tarter, not plaque. Plaque takes a while but you obviously will feel tarter only teeth at the end of any day if you've had sugary or carby foods. White bread starts breaking down into sugar as soon as it hits your mouth due to enzymes in saliva.

Re: Why didn't our ancient ancestors get cavities?

#115
post #80
post #33

My grandmother chewed betel leaves with a small amount of tobacco, betel nuts, lime (calcium hydroxide aka chuna/chun), multiple times a day all her life. Her other diet consisted of tea just as many times per day, and for actual food a diet of rice, fish, and vegetables. For the majority of her life I don't think she actually had access to fluoridated toothpaste and probably used neem twigs or even charcoal at times…

Interesting. My Indian grandparents and g-grandparents appeared to have most or all of their teeth, and were a long lived bunch (all but one into their 90s). I can’t say conclusively all but I never noticed any gaps or problems, which is the kind of thing kids notice. The g-grandparents would all have been born in the 19th century. My Australian grandmother had all her teeth pulled out when she was 12 and wore artifi…

Why pulled?

Re: Why didn't our ancient ancestors get cavities?

#116

Weston A Price is really the go-to for the early research in nutrition and dentistry. His book Nutrition and Physical Degeneration was making the rounds back when Nourishing Traditions became popular. Price, conclusively in my mind, showed that the moment the modern western was introduced into cultures who ate traditional foods, the next generation had terrible teeth, jaws that were too small for all their teeth, etc…

> The typical western diet is a shit show, imo On the other hand, from The Early Chinese Empires: Qin and Han : > In the Eastern Han [roughly 25-220 AD] a celebration was held each autumn at the Old Man Star Shrine south of the capital. During this feast those who had reached the age of seventy were given imperial staffs and fed by hand with rice gruel (on the assumption that they had lost their teeth). The staff had…

The cause for losing teeth is very different from cavities.

Re: Why didn't our ancient ancestors get cavities?

#117
post #7

So apparently some think cavities (caries) are contagious via mouth fluid exchange in kissing... if so, then perhaps an ancestor became an unwitting host through some unknown mechanics. Perhaps poorly cooked jowls of some sort.

Could have been hand to mouth contact from any number of sources. Bacterial biofilms are pretty easy to transfer and as we recently learned from eating bats it only has to happen once.

People will, even today, grab fruit off of trees, wipe it on their shirt, and eat it.

Same goes for eating berries, which are much closer to the ground.

Go back in time a bit, imagine 20k years ago, someone pulling a carrot, wiping it off, and eating it. Or even washing the dirt off, but unless cooked, or soap is used (a relatively new discovery), or a knife to remove the outside?

A little water isn't going to destroy all bacteria on a carrot.

Even today, I'll pick carrots, throw them in sink, wash them a bit and peel. Then eat raw.

Bacteria is everywhere, and we're eating the same thing bateria eats, eg that sugary carrot plant...

And...

* milk

* honey (literally bee spit sorta)

* cheese (pig stomach juices thrown in with milk for a few days)

By no means do we isolated ourselves baterialogically.

Re: Why didn't our ancient ancestors get cavities?

#118
post #67

Earlier quoted context omitted.

"The Verdict: You can do a lot to protect and strengthen your tooth enamel, but once it has eroded, it’s gone, baby, gone!" Says webmd. https://www.webmd.com/oral-health/features/can-tooth-enamel-...

Webmd is an awful reference

No post body was provided.

Re: Why didn't our ancient ancestors get cavities?

#119
post #16

When your diet is mostly meat based, and some foraged greens and rare fruit, it is not the ideal environment to feed the process that creates cavities. Also, I'd imagine tooth extraction predates a lot of modern history, which may skew results, but that is just a guess on my part.

I figured it’s that they ate all the animal. They always boiled the bones and that strengthened their teeth. I bet if you look at ancient people in tropical areas they had less teeth as well as less need for them.

Interesting, I would assume that prehistoric times required "perfect" teeth (and even overall geometry and jaw structure). You need a high quality grinding / cutting tool to rip meat easily.

Re: Why didn't our ancient ancestors get cavities?

#120

genes probably. I’m mid 30s and have never had a cavity. I go to the dentist every 6months. I also have a huge sweet tooth.

I used to get a small cavity every 2 or 3 years. My dentist recommended I switch over to a stannous-fluoride base toothpaste about 10 years ago and not a cavity since and my cleanings got much easier for the dentist. There is definitely some genetics to it too. I had a gf who was religious about her teeth routine, still had a small cavity almost every time and eventually a couple of crowns. She wouldn't lay off the sweets though. Never saw anyone who liked sweets as much as her.
Post reply on HN