I haven't had any major dental work in a few years, but when I did I notice I felt very little pain. I required very little numbing medication during a root canal, so little that the dentist was amazed. Plus, I had a very large cavity that shocked him, because I said it never caused me any pain.

Of course, all of the non painful teeth were on the right side of my body, which is puzzling, because on the left side I can feel pain on the smallest of cavities.