Good Morning - I had a 2nd molar pulled which resulted in an oro antral communication. It has been six weeks, and the oral surgeon tested the other day and told me that it is closing from the inside out. I am supposed to go to an event next weekend which would entail driving through some moderate elevation (1800-2000 ft) areas. Do you think that this is something that could cause it to reopen. I should have asked the surgeon, but forgot. Now he is on vacation. Any experience with this? Thanks very much.