An abscess is one thing, trapped air another. You were referring to the
latter in your first post. Any trapped air from an extraction is going
to be long gone by the time one is fit to fly after multiple extractions
requiring the use of post op pain meds and a recuperation period.
Situation not similar to the bends at all. No gas is coming out of solution.

Jim Macklin wrote:
No, that is one possible reason with a filling, but surgery
and extractions can heal over leaving an abscess and that
could be a very painful problem. When my wisdom teeth were
removed, the roots actually penetrated the sinus cavities.
For several weeks I could have salt water run through from
my mouth to my nose by dipping my head. This was not a
problem flying, it was even more venting. But I would want
to have a flight test before I was the only pilot on the
plane.

Gas would be reabsorbed if enough time passed, but if there
was any gas it would expand during a climb faster than it
would be absorbed, think the bends.