Dear Sir/Madam, I am writing to ask advise regarding flying long-haul with incomplete root canal surgery treatment. My history is the following: I had two impacting wisdom teeth , both lower set. First of all, root canal surgery was performed on the tooth in front of one of the wisdom teeth, removing the three nerves , and filling the root canals. A temporary filling was put in the cavity of the rest of the tooth. I then had surgery to remove both my lower wisdom teeth. During this procedure, the existing temporary filling in the cavity mentioned above was replaced. Since surgery, this temporary filling has fallen out of my tooth, and I have not yet had it replaced. I am booked to travel long haul in a few weeks, and have heard that travelling with an empty cavity can be dangerous owing to cabin pressure . Does this risk present a problem for a tooth with its root nerves removed and filled ? Many thanks for your kind advice. Kind regards, TO