Yesterday, I was speaking with my piano teacher (she's 25) of my experience with the CPAP, nose breathe and the fact that I was a mouth breather and that I had difficulty to keep my mouth close at night.
I told her that I saw someone on the net (Dr Sue) that was selling dental device that forces you to breath by the nose :
viewtopic.php?t=3807&highlight=made+mouthguard
Then she talked to me of her experience in having Orthodontics for 6 years and, at the end, to keep the teeth in place, she had to sleep with a dental device that does exactly what I was describing. In fact, when I showed her the Dr Sue's device, she told me it looks exactly at what she had to sleep with.
So, instead of buying Dr Sue's device, I will try to meet an Orthodontist in my own town. If it works, I'll tell you.