Most NHS orthodontists won’t do any work until all the adult teeth are present whoch is why we went Private as the palate is much more easier to shape when the child is younger. Also, of the adult teeth are coming down into a palate that is too narrow and misshapen then the teeth adult will ultimately be crooked and crowded.
The problem is that in order to change the shape of the palate and expand it you have to have a device that can be widened as the gradual widening of the device (done manually by the parent or child) is what widens the palate. Wearing a retainer will just keep the palate at the same shape/width it is now, it won’t widen it so it won’t improve the situation.
My son had to have his upper and lower palates widened and had a metal fixed expander on his lower jaw and a removable metal expander on his upper jaw.
They each had an inbuilt device that we had to turn every fortnight with a little key (similar to the little pin you use to access your SIM in your mobile) which would widen the palate by a minuscule amount each time.
He had to wear his lower jaw expander for just over a year and he still has his upper jaw one now and it’s been two years of pin turning and expanding. Thankfully we are nearly at the end of the journey!
The difference in his jaw and his face shape is remarkable though and all his teeth (as his adults one are now all coming through) are perfectly straight.
All the snoring and mouth breathing has completely stopped too and we saw a very quick improvement with that.
We didn’t go down the palate expander pathway until he was 10 though as the braces are quite a responsibility and it can be tough for the child in terms of how alien it can feel.
Our other son also needs the same and we going to wait until he’s 10 as well. I think he will find it harder to cope with than his brother unfortunately but it does need doing.