Wow, that looks awfully painful Get better soon! If you're going fast enough to crash like that and you really are concerned about your jaw/teeth, as Irulan mentioned, a full face helmet might be worth looking into. Although, its not common for XCers, I have seen pictures of some who do use them.

Other than your crash, what did you think of Sea Otter? It sounds like a total blast That's so cool that you got to race there!