When sleep apnea is considered to be treatable with a dental appliance?

In my opinion, my lower jaw is rather small and in an inside position. The foreteeth in my lower jaw are completely behind the foreteeth of my upper jaw when my jaws are completely closed. I've been thinking if a dental appliance could help me to avoid snoring and prevent apnea. I have moderate sleep apnea that is at its worse when I'm sleeping on my back. It also feels like my tongue is too big to fit in. I bite it while sleeping almost weekly.

Here in Finland CPAP treatment is regarded as the default and now I have an automatic CPAP device for a week to see if CPAP treatment is effective. After four nights it is obvious that the noise of a CPAP device is intolerable to me. I'm just over sensitive to noise. Is it some sort of neuroticism or have I damaged my hearing before so that my treshold for tinnitus is very small, I don't really know. Anyway,  my ears are ringing when I've tried to use CPAP. Now it feels like they're ringing all the time. I'm afraid that the doctor will pressure me to continue CPAP and alternative treatments are never considered.

Believe it or not, it sounds like both issues (ear wedgy's), deep bite, and obstructed airway may be helped by an oral appliance for treatment of your airway issues.  I do not know who you could see in Finland, but there is a place you can go to online to ask, and if anyone will know, they will.  There is a new dental (dentist) association that is working on training and treating the population who need help with oral appliances, with the supportive technology to verify that it is working, not just making them silent apnics.  If your bite is as far back, and deep as you describe, when you close down, since the tongue is attached to the lower jaw, it also gets wedged back into the throat, especially when you lie on your back, and the collapse of the tissue can contribute to the closing of your airway.  There are several dental appliances that will 1) open your vertical bite position 2) bring your mandible (and its connected tongue) forward 3) in the process take the pressure off of your ears.  The most important thing, though, is to make sure that your Oxygen saturation is up where it is supposed to be, not just relieving your snoring.  Go to:  apneadocs.com, go into  the "contact us" portion, and ask them if they know of anyone in your country who can help you - properly.  They are the ones that I can think of that may be able to get you going in the right direction.  Good luck