I've had at least a couple of bad experiences with the dentist. One of these related to a difficult extraction for which I don't blame the dentist. The second related to a painful and deep filling in which, for a reason I can't fathom, the anesthetic did not do its job. Rather than stopping or offering alternatives, the dentist pressed on, despite my protestations. I sweated and moaned and so did he. A week later I had to visit another dentist in order to correct the resulting problems. The...