Introduction

A couple of years ago, I went to the dentist for the first time since the late 1990s. The main reason I’d failed to make dental appointments was embarrassment at having waited so long. I could just hear the dentist chiding me, “Ah, I can see you haven’t had your teeth cleaned properly in 5 years. For shame!” The more time passed, the worse the embarrassment grew, and finally it took actual pain and a visible hole in a tooth to overcome it. So I was disappointed, but not surprised, to learn that I had several cavities and needed a root canal. The dentist was kind and understanding, but nevertheless pointed out several times that this visit might have been much less painful (and less expensive) had I flossed every day and gone for ...

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