Deb,
I am sure the ACS can help you with this, and I would recommend you call them first, but you can also check for free Dental clinics in your area.
In the Pittsburg area:
Center City Health Center
2827 Bedford Avenue
Pittsburgh, PA, 15219
412-687-1250
In the Philadelphia area:
Catholic Worker Clinic
1826 E Lehigh Ave
Philadelphia, PA, 19125
215-426-0364
For other sites check at
www.freemedicalcamps.comA friend of mine is a dentist and he volunteers time at a free clinic just to help people in need like you.