I almost always read in the news/press that dentists recommend to brush teeth two times a day for 2-3 minutes.

This drives me crazy, because it does not make sense; The point for dental health is to systematical clean every surface of your teeth twice a day (and use inter-dental brushes/floss once a day). For me, brushing my teeth takes around 6 minutes, if I hurry up. For someone faster it might be possible in 1 minute.

So, why do dentists always give the 2-3 minutes recommendation?

  • Otter@lemmy.ca
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    1 year ago

    I think it’s an average estimate, not a hard rule.

    The exact time doesn’t matter, but it’s an approximate reference for how long you could aim for

    • some people don’t brush enough
    • some people brush too much (harms enamel and damages gums)
    • federalreverse-old@feddit.de
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      1 year ago

      In a sense, I guess op is right though — I recently read that ~70% of people in a study were brushing ineffectively, no matter how long they were told to brush. Their brushing only improved after being told to make sure to brush every every “sector” of their teeth.

      • grabyourmotherskeys@lemmy.world
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        1 year ago

        When I was growing up they used to say “brush after every meal” and then it became three times per day, now it’s “please just brush twice at some point”.

        • wolf@lemmy.zipOP
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          1 year ago

          I also got the ‘brush after every contact with sugar’ thingy.

          The common agreement nowadays seems to be twice a day and the points are very clear: before you go to bed and soon after getting up in the morning, to bring some fluid to the nasty bacteria, remove their food and plaque from your teeth.

        • federalreverse-old@feddit.de
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          1 year ago

          You’re right. When I grew up, I was told to brush three times as well, more I brush twice only. Not sure when or why that recommendation changed.

  • OtisRamflow@lemm.ee
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    1 year ago

    My electric toothbrush does 30 seconds per quadrant, 2 minutes total. I’m 38 have zero cavities and my teeth are fine. I only brush once a day.

    • jasondj@ttrpg.network
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      1 year ago

      There’s other factors than just brushing your teeth but brushing is probably the easiest factor that most people can reasonably take control of.

      Genetics, obviously you can’t do much about. But you can avoid sweets and decide not to get pregnant (hormonal changes during pregnancy can cause mouths to get more acidic and make plaque harder to remove, and can also soften the gums and bones that hold teeth in, or even weaken the teeth directly). Also, if you want nice teeth, it’s especially important to abstain from smoking crystal meth. And that’s even more important during pregnancy.

      But telling everybody “brush twice a day for two minutes” is a small ask with huge returns.

      • DriftingDeep@lemm.ee
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        1 year ago

        Idk. I’ve been able to maintain a pretty consistent balance of crystal and healthy teeth. Every one of them that’ve fallen out have been nice, white, and cavity free.

    • guyrocket@kbin.social
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      1 year ago

      Sonicare or oral b?

      I wish I had bought my sonicare much earlier than I did. Seems like the best way to keep your teeth healthy outside the dentist’s office.

      Seems expensive until you have a dental bill that is much more expensive. I highly recommend getting a sonicare.

  • linearchaos@lemmy.world
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    1 year ago

    The whole point is to not leave starches/sugars in places long enough for a biofilm of plaque to form.

    The problem is, teeth are poorly shaped to clean and the interface of the gums is down right hard to get to.

    So what they’re trying to do is to get you to clean often enough that you manage to get some of the hard to get areas covered but not so often that you’re sanding the enamel of your teeth.

  • rgb3x3@beehaw.org
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    1 year ago

    Because it should take you about 2 minutes to brush your teeth.

    If you’re actually brushing for 6 minutes straight, you’re overdoing it and damaging your enamel and gums.

    Brush gently, floss thoroughly.

    • green_witch@beehaw.org
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      1 year ago

      Adding to this, also make sure to floss gently.

      My hygienist told me I was flossing too hard lol.

    • m-p{3}@lemmy.ca
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      1 year ago

      One reason why I enjoy my electric toothbrush, as it vibrates every 30 seconds to tell you to switch to the next quadrant, up to 2 minutes. No guesswork, and it brushes better than I ever could using a regular toothbrush.

    • wolf@lemmy.zipOP
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      1 year ago

      Seriously, I have no idea how one could brush teeth in 2 minutes. I brush gently, use the simple swipe away from the gum technique and just work systematic chewing surfaces, inner surfaces, outer surfaces. Each part gets 2-3 swipes. I had a professional dental cleaner teach this technique to me, and she also told me that she couldn’t finish within 3 minutes. (Do not misunderstand me; I would happily get away with 2 minutes.) BTW flossing is another interesting topic, AFAIK there is no study which can show that flossing helps your teeth/gum. (I floss daily, but I just cannot understand why there is no study which supports this practice.)

      • exscape@kbin.social
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        1 year ago

        No, it’s not. I have never brushed my teeth too hard and have always used very soft toothbrushes, but I used to brush for 6-7 minutes, and my gums have suffered for it. Way too much of my teeth are now exposed, which is both ugly and causes sensitivity.
        In the long run, if one keeps this up, teeth will start falling out.

        Don’t overbrush.

  • danhakimi@kbin.social
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    1 year ago

    My electric toothbrush works in four 30-second increments. Each 30 seconds is plenty of time for me to cover a quadrant. I slowly go over the outside, inside, top/bottom, gums in each quadrant. Maybe if I was meticulously brushing each tooth one by one, I could see the issue, but that’s not necessary, is it?

  • Lucidlethargy@sh.itjust.works
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    1 year ago

    So I’ve had something like 25-30 cavities filled in my life. I haven’t had a single cavity in 10 years, though. I brush only once a day, and floss. The trick is flouride rinse afterwards. That’s the secret.

  • 420stalin69 [he/him]@hexbear.net
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    1 year ago

    I think it’s a game of diminishing returns.

    Let’s say 6 minutes gives you perfect 100% cleaning.

    Well 30 seconds probably already gets you 50% or more of the total benefit just by getting fluoride on your teeth and rinsing your mouth a bit so getting people to 3 minutes is probably approaching perfection anyway and if you start asking people to do 6 minutes then they’ll say fuck it I won’t bother at all so settle for the 80% win.

    I assume.

  • Omega_Haxors@lemmy.ml
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    1 year ago

    Buy high fluorine toothpaste and put a TINY (I mean, miniscule amount) on your toothbrush. There should be only a few speckles of the stuff on there. Then brush just enough to ensure each and every nook and cranny is covered in the stuff, rinse and spit. If the next time you go to brush you still taste the toothpaste, you put on too much and therefore don’t need to reapply it. Just put on a little less next time.

    Never had a cavity since I started doing that, and I’m not even a 1/16th through the tube. Best money I ever spent.

    EDIT: A few other dental tricks that will help dramatically:
    1. You don’t need to brush twice a day, once is plenty and preferably before bed
    2. Don’t brush right after eating/drinking especially if it was acidic, that tears your enamel apart
    3. Use only a pea-sized blob of toothpaste, if you use it like they show you in the commercials, you’re an idiot
    4. The primary goal of brushing is to apply fluoride, the secondary goal is to get shit out of your gums
    5. Tooth whitening is a scam designed to poke at your insecurities. If you buy into it, you’re an idiot
    6. Dr. Fortnite says floss every night. Use a water flosser or pay attention to how your dentist flosses as their technique is immaculate
    7. All floss is blood-flavored, do not try to push back against this universal truth for it is absolute
    8. There is no sensation more elating than your dentist actually being impressed at your dental health
    9. Some toothpastes and flosses cause cancer, research which ones and stay away from them
    10. A Colgate tee shirt looks almost exactly like a supreme one and costs a fraction of the price
      • HeartyBeast@kbin.social
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        1 year ago

        Since OP has firm views about what dentists says, I’m going to assume that they visit the dentist on occasion.

          • otl@lemmy.srcbeat.com
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            1 year ago

            Ah yeah this hits a nerve for me: the idea that some individuals are the arbiters of medical science and knowledge. Answers to questions like “why should I brush my teeth” is something to be found in a textbook, hopefully at a public library, not to be dispensed out by some individual with fat fees.

      • wolf@lemmy.zipOP
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        1 year ago

        This, so much!

        It really makes me angry, that there is no free dental hygiene training for children/teenagers.

        I life in a comparatively rich society (Germany), but our retarded health care system pumps billions every year in preventable diseases (like most dental problems) and exactly zero in prophylaxes.

    • wolf@lemmy.zipOP
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      1 year ago

      Fair and good question. I literally ask my dentist on every single visit the following points

      • is my dental hygiene ok?
      • do I damage my gums with my brushing?
      • what can I improve in my dental hygiene?

      The dentist always tells me it is okay and I cannot do more, than I am doing.

  • snowe@programming.dev
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    1 year ago

    You are harming your teeth if you brush them that much, that’s why. Overbrushing is just as bad as brushing too little.

    • saigot@lemmy.ca
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      1 year ago

      In case you are unaware current advice is to avoid brushing for a while after an acidic food or drink

        • Big P@feddit.uk
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          1 year ago

          Technically then I brush after every meal provided I don’t die after eating

      • jasondj@ttrpg.network
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        1 year ago

        Guidance for preschools around me is for them to brush kids teeth after every meal that’s served at school.

        That was recently reinstated after being suspended for a couple years and the teachers are practically (as much as they legally can) begging the parents to sign the waivers to opt their kids out of it. I don’t blame them. It seems excessive and it’d take a ton of time for two teachers to scrub a dozen or so sets of toddler teeth, while also controlling said toddlers while they wait for everyone to finish.

  • bouh@lemmy.world
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    1 year ago

    There are two things with brushing your teeth: first, the mechanical action of the brush and the microparticuls in the toothpaste will clean the tooth. Second, the fluorine in the toothpaste will consolidate the enamel of the tooth, but it needs a bit of time to be absorbed.

    This is why it’s important to use real toothpaste and not the natural shit you can do yourself at home.

    So 2-3min is the right time to brush the tooth and allow the fluorine to be absorbed. Some dentists will also tell you to not rinse the mouth, only spit the saliva and paste, I imagine so that fluorine has more time to work.