QUOTE (QDROphile @ Apr 28 2008, 04:43 PM)

Oral surgery and new crown should be eligible for payment by the HSA. The terms of the FSA will determine what is eligible for payment by the FSA. FSAs may be limited in unlimited ways.
If the FSA plan document says it can be used for dental expenses, then you can use the FSA.
You can use the HSA for any eligible 213d expense.