Before I had dental insurance I used to go to the Indiana University School of Dentistry for my dental check-ups and the occasional filling. Very cheap.
I'm a little weird; I love going to the dentist. I love teeth cleaning, drilling, fillings, the whole nine yards. I don't mind injections at all, (I actually kind of like them...)and I find sitting in that reclined position rather relaxing.
Then again, I usually fall asleep during MRI's.