Okay,...so an orthodontist may recommend “widening” just a few mm. Listen...if it is during the child’s major growth spurts..quote unquote “widening” may actually be constricting. This is because when you break / weaken the maxilla...it must be supported! This “support” of attaching and holding to jaws may cause jaw pain and trap the child!!
The worst recommendation I had was from an orthodontist who wanted to “widen” 2-3 mm with a turn rate of every 3 days. Then he wanted to hold 9-12 mo. This is where I was going to take my child. It is about a year later and her jaws have far blown past that. His rate was not very skeletal, either. Overall, a bad treatment. I thank that little voice in my head, which instructed...“He’s not her orthodontist.” This stopped me in my tracks & sent us on the wildest of journeys you could imagine! This orthodontist has a tall, narrow face & regularly traps children’s width growth.