My orthodentist referred me to a logopedist (specialist that deals with speech and swallowing disorders) to train my tongue position to prevent my teeth from getting crooked again. This indeed included training to position my tongue to the roof of my mouth, but also training to click loudly with my tongue and straining my lip muscles with a button and a rope. This was around ten years ago. I thought this connection between ortodentics and logopedists was already common? A quick search calls this myofunctional therapy.