I used to have a problem with Sleep Apnea.
I tried a dental device for a while, and it did help, but it was also making my lower jaw stick out and I was developing an underbite. Plus, it made my jaw ache all day long.
I had another sleep study done and they noticed that I have sleep apnea really bad if I sleep on my back, but I’m OK if I sleep on my side. So now, I just sleep on my side and don’t have sleep apnea.
I snore when I sleep on my back but not on my sides. I used to prefer to sleep mostly on my back but I have learned to side sleep. It’s just gravity in action when you think about the physiology. There is more pressure on mandible and throat tissue to collapse down when you are on your back.