1. Is it true that some people need more anaesthetic than others? Is this just a body chemistry thing or can people who routinely take too many pain killers build up a tolerance to any kind of anaesthetic. (My dad's done this for years and he says he always need several shots of anaesthetic at the dentist's office.
2. I have sensitive teeth and tried using Sensodyne for a while, but I'm also concerned about keeping my teeth white, so I've switched back to a whitening toothpaste (one of the Crest ones, I think). But my teeth being so sensitive is bugging me. Should I use a bit of Sensodyne and Crest toothpastes at the same time or use one a.m. and the other p.m.? What does Sensodyne do to fix tooth sensitivity?
3. A couple years ago there was a blue powder that was marketed towards smokers. You would dip your wet toothbrush in the powder after brushing normally with toothpaste, and brush with the blue goop. I don't smoke, but it made my teeth really white. It just disappeared from all the stores I've looked in a couple years ago. Have you heard about it?
Btw, thanks so much for doing this. I really appreciate it. My dentist gets sick of me asking him a billion questions when I go in to see him.
