This very well respected investigative journalist has written a book on breath and it he's featured here on the Joe Rogan podcast.
Start at about 1:07:30 if you want to hear specifically about how changes in diet and then ortho affects jaw shape.
Basically, he argues that MANY orthodontists are now saying that we will look back on these past decades of ortho (since extraction-orthodontics were developed in the 1940s) with HORROR at what we were doing to peoples mouths by making them smaller, less space for the tongue, and this creates smaller airways.
He says all the new approaches are about making the jaws wider (through sarpe, homeoblock, or other forms of expansion) to make space for the teeth, not the other way around.
It breaks my heart everytime I have to hear this s**t cause I know how my ortho butchered me.
Apparently this guy used the homeoblock for a year and catscans showed he had gained significant bone mass in his face, better airway tone with an expansion of 20 percent in his airway.
Don't get extractions folks. You hear a ortho who wants to give you extractions RUN RUN RUN. I might try the homeoblock, but I'm afraid it may cause my teeth to tip. Maybe it doesn't The claim that you can't widen the palate without surgery is bulls**t. I've seen people do it through other devices, so I know that's for sure.
https://www.youtube.com/watch?v=U5o9b2RVC2E