Well, the Comfo Bite mouthpiece has already been mentioned, and some people love them. They are smaller and don't rely on tooth pressure to retain the mouthpiece, but they may not solve the problem because your mouth still has to be open somewhat and you do have to apply some lip pressure. I had a student that was complaining of a sore jaw after her first checkout dive. I had one in the "Dive shop In A Box" that I had purchased as something just to have as an additional back up and put it on for her. She did not complain of jaw pain afterwards. They are a much cheaper option than my next suggestion.
You may have the best reason I have ever heard for a full faced mask. I like mine....I don't love mine. Clearing your ears is a little different and takes some getting used to, but you can breathe through your mouth or nose. They are a little bulky and harder to travel with, but it would be an ideal solution to your situation. Sometimes I use more air...sometimes I don't. Go figure... I use a traditional FFM for teammwork, but there is a model called a Spectrum that allows you to use your own standard second stage, they are a little cheaper and have a nose pocket to clear with in a traditional manner.
Check with your local diveshops about a test dive in a pool to see if you like one. Sometimes diveshops will offer free demos in their pools with them. They run about $600 and you can find them used pretty easily for about half that. There is all kinds of information out there, and some good videos on YouTube as well.
Edit-looks like Drfish beat me to it...
Neptune Space G.divers Integrated Mask
Spectrum Full Face Mask
Guardian Full Face Mask
Good luck,
Jay
You may have the best reason I have ever heard for a full faced mask. I like mine....I don't love mine. Clearing your ears is a little different and takes some getting used to, but you can breathe through your mouth or nose. They are a little bulky and harder to travel with, but it would be an ideal solution to your situation. Sometimes I use more air...sometimes I don't. Go figure... I use a traditional FFM for teammwork, but there is a model called a Spectrum that allows you to use your own standard second stage, they are a little cheaper and have a nose pocket to clear with in a traditional manner.
Check with your local diveshops about a test dive in a pool to see if you like one. Sometimes diveshops will offer free demos in their pools with them. They run about $600 and you can find them used pretty easily for about half that. There is all kinds of information out there, and some good videos on YouTube as well.
Edit-looks like Drfish beat me to it...
Neptune Space G.divers Integrated Mask
Spectrum Full Face Mask
Guardian Full Face Mask
Good luck,
Jay