Not sure if this has ever been discussed in these forums in the past. It's mentioned in this peer-reviewed (I assume) paper from 2006 in the Brazilian Journal of Otorhinolaryngology: https://www.sciencedirect.com/science/article/pii/S1808869415300513
Points worth noting:
They make it clear that they were not attempting to see how much expansion was potentially possible. They were only trying to prove it could be done, and for a research paper (as far as I understand it) once you prove (disprove?) the null hypothesis, you've accomplished your mission.
They also make it clear that they did not endeavor to determine whether results were dental or skeletal. But they do point out the part about overall facial width increasing - as measured from the outer points of the zygomatic bones. I would think that's not something you'd see if all you did was push the teeth outward through the alveolar ridge.
The paper just proves adults can change bone over time, something many have already done on this forum. They used some kind of appliance that just forces the palate apart, similar to MSE I guess, but slower.
The problem with these appliances is that they provide no forward growth, look at MSE before and after, there is a huge difference in maxilla and molar width, yet the face doesn't change too much. Look at Ronald for example.
Even worse is that just forward growth isn't enough, too many people, including Ronald, have their upper maxilla too forward and also upward(too clockwise rotated). The tongue is really the best appliance you have, pull the posterior palate down, and push the front palate forward.
Too many people focus on the width of the face, over-doing upwards pressure with the tongue and chewing when they should be allowing their posterior palate to drop down.
Thanks for the reply. They do use an appliance, but it's not like a MSE. It's an acrylic appliance placed in the roof of the mouth. It's not bone-borne like a MSE. And all I ever hear around here from Ronald and others is that tooth-borne appliances will just always end up tilting your teeth. Yet, they checked for that, and didn't see any evidence of it in the blinded radiology ceph traces.
So I just thought it was interesting, that apparently it can get done some ways that aren't directly bone-borne. I do agree that adult bone changes over time.
Thanks for the reply. They do use an appliance, but it's not like a MSE. It's an acrylic appliance placed in the roof of the mouth. It's not bone-borne like a MSE. And all I ever hear around here from Ronald and others is that tooth-borne appliances will just always end up tilting your teeth. Yet, they checked for that, and didn't see any evidence of it in the blinded radiology ceph traces.
So I just thought it was interesting, that apparently it can get done some ways that aren't directly bone-borne. I do agree that adult bone changes over time.
Maybe because they did it slowly? It does say non-rapid.
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