So what I understand all of you to be collectively telling me is

1) Normal amount of negative pressure in the right place will not cause trauma

2) Excessive or misplaced negative pressure can be a *proximate cause* of
trauma.  (Comparable to rubbing, per Gonneke's post, also when excessive or
misplaced.)

3) If you have trauma whose *proximate cause* is excessive or misplaced
negative pressure,  your best bet is to be figuring out the *underlying
cause* of that excess or that misplacement (just as you would find the cause
of the rubbing -- eg, poor positioning, oral anatomy, not enough flow,
whatever.) and treating that underlying cause.

Elisheva

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