Apparently, I am actually quite good at brushing my teeth. According to Dr. Nissan, I had a remarkably low level of plaque, and every surface and crevice that a toothbrush or dental floss could cover was in great shape. The problem was those surfaces that can't be reached by such dental implements... some of my teeth have crevices too narrow for a toothbrush bristle. Two of my molars need to be drilled because of small cavities there. They're small enough that if they were somewhere else, Dr. Nissan might consider just trying to watch it carefully and suggest better dental hygine, but this is nowhere I can actually do anything. So some time after I get back to Washington University, but probably within the next month, I'm going to have to have those fixed.
At least we've noticed them early so they are quite small, and they're on the surface of the molar rather than anywhere inconvenient. The upshot to this is that I can get both teeth fixed in one 45-minute visit, and Dr. Nissan won't have to drill far enough for me to even really need numbing agents- it's just a good idea anyway, in case his aim is a little off. I'll just lose a weekend.
It's a minor inconvenience at worst, but it's still frustrating that my teeth are in very good condition everywhere I can brush or floss (even though I don't have good flossing habits!) and I still have two cavities.