Narval CC lifts off lower jaw

Hello! I am new to all this! I was diagnosed with moderate obstructive sleep apnea this year & decided on the Narval CC. My dentist encouraged me to try it out at home for a couple hours each night before I went to bed before officially using it overnight.

I have an issue where if I yawn/open my jaw wide, my lower tray lifts off my teeth. I can feel it snap off & then the tray is just there in my mouth.

The dentist had me show him; he says that this would not be an issue while I am actually sleeping as I will be resting & not be opening my jaw with enough force to lift the tray off. I am a mouth breather at night though & do wake up with my jaw hanging open sometimes! He pointed out that even if it did pop off, I would wake up & not choke on it etc. I have been afraid to try it though!

Does anyone else have this issue?!? Is this is known thing & okay to use? I called Resmed but they were not able to help me - they said they can't help on the clinical application side.

Thank you for any help! I keep looking at this expensive device & am so so tired but I'm anxious about trying it.

I am a dentist working in dental sleep medicine. If a person opens their mouth wide enough and hard enough ANY oral appliance in which the upper and lower trays are attached together will come loose and come off. Generally, the lower tray will come off first because the teeth are smaller and hold less tightly. The question really is whether or not that will happen when you sleep and you can't tell until you try it. I agree with your dentist that because the upper and lower Narval trays are attached together, the likelihood of your swallowing it or choking on it is virtually nil. A.B. Luisi, D.M.D.

Dr Luisi is correct. There is not a lot you can do to "tighten" a narval. And I am not a fan of chin straps as they can hold your jaw in the wrong position. I have made a lot of Narvals over the last few years. The question I would ask is do you go back into the appliance after you yawn or open wide at night?

Dr Tony