Yesterday I had an appointment with my old orthodontist to get a little retainer removed from the inside of my bottom teeth. It seems so long ago now, but I once had pretty messed up teeth. Back when I was about 13 I had my first visit with the ortho, and they started to plan the torture regimen for the next few years. First, because my teeth were so crowded, they extracted four permanent teeth from my mouth. That still didn't provide enough room, so they cemented this little device to the roof of my mouth that reminds me of "The Rack". Basically every night I'd stick a little key in ...