I just got fitted by my dentist for a night guard because I clench my teeth when I concentrate or am exerting myself, and am grinding em down to nubs and need crowns, etc. Since he told me this, I noticed when I come out of the water sometimes my jaw is actually tired from clenching when I'm paddling for waves. So I am thinking of wearing a mouth guard when I surf but it seems like it'd be tough to get used to, especially swimming and exhaling under water, etc. I don't want to lose the thing. Anybody have any experience or advice with this? Anybody try those high performance Armourbite things that go on the lower teeth? Before I hear the inevitable kook gear comments, I'm trying to save myself thousands in future dental work here.