The last time I had a filling, the dentist nearly filled the wrong tooth, too! I stopped him when he started thinking out-loud, "Why did I say this tooth had a cavity?" and stated that I was wondering why he was checking the right side of my mouth when on the previous visit he indicated a problem tooth on the left side. He was a little embarrassed, but thanked me.

When I was 8 a dentist filled a perfectly healthy tooth with a mercury filling just because I had insurance.  As a result I got autism and limbic rage.  I've never had a cavity in my life.  The tooth had just come in, so there was no way I would have had a cavity, since I never had one since.  I have suffered tremendously because I am very allergic to mercury. Filling teeth needlessly is probably common with many consciousless dentists.  Be careful! Trust a used car salesman before you trust a doctor or a dentist (this doesn't apply to Dr. Mercola).