[busterbaxter]

The practice is called orthotropics. I can vouch for this user's experience myself, have had difficulty breathing for many years which led to poor teeth and a narrow palate. Once I received a palatal expander i realized how important it was to keep tongue pressure flat on the roof of the mouth. I practice regularly now and have seem improvements to teeth, breathing, and facing structure. It's a shame this stuff isn't taught more. You can find more details in this video: https://youtu.be/eh9OqEd5z1k

[TheCowboy]

Could you provide more resources that demonstrate the science, such a studies or journal articles? I was interested and didn't find anything.

Additionally I found this that seems to suggest skepticism: https://www.nature.com/articles/sj.bdj.2014.711

[ponderatul]

I understand your skepticism. But you should start with the orthotropics youtube channel. Obviously, not an unbiased source of information. But it's a start from which you can at least critically evaluate what they say.

Another thing to bear in mind is that scientific theories are obviously developed faster than they can be proven. And as long as what Orthotropics is not invasive you can try what they preach yourself and draw your own conclusions rather than wait for academic silos to try prove that the method works.

I am trying it on myself. The results are not magical, but I can feel them, I can breathe better. And at the end of the day that's what matters most

[Knufen]

When pressing your tongue against the top of your mouth, do you keep your teeth close together or with a slight opening?

[Empact]

My mouth is closed but my teeth are not in contact.