I'm male, in my mid 40's. I was diagnosed with severe sleep apnea about 3 years ago. I decided to go with a dental appliance instead of a CPAP machine. There is a well known dentist where I lived who specialized in appliances for sleep apnea patients. This appliance forces your lower jaw slightly forward and also keeps your upper and lower teeth from touching. Both changes open the airway up to prevent apnea. I spent a lot of money on the appliance and it seemed to work well. I was sleeping much better and not getting the headaches I had every morning. I was still unsure how effective it really was so I talked the sleep clinic into letting me take a sleep study while wearing it. Much to their surprise it cured most of the apnea however I still snored and never reached third stage sleep. I decided to try a CPAP machine and got a ResMed S9. At first I had the nasal mask and felt terrible when I slept with it. The supplier felt I should try a full face mask as I could be opening my mouth while I slept. While the mask seemed to fit well it seemed prone to leaking unless I slept on my back (I like to sleep on my side). I kind of gave up on the machine and went back to the dental appliance. Well, lately my mild case of TMJ has gotten worse and I suspect it's from wearing the appliance. My jaw muscles now ache and I am getting some severe headaches centering at my left jaw joint. I've tried going back on the CPAP machine and after two nights with the face mask I gave up. I'm waking up constantly and I really feel like it's the apnea. The problem I have is I have now moved 2000km from where I purchased the machine. Where I am located there is no retailer (or sleep clinic) for this equipment. Before I moved out here the retailer bumped up the pressure (It's set to 7). I just acquired the ReScan software and am about to install it. Should I boost the pressure? I'm really frustrated as I really would like a good night sleep without the dental appliance!