I'm probably doing my teeth a ginormous favour these days. I got a tooth Polish and a fluoride treatment at the dentist, I brush twice a day with fluoride toothpaste and I rinse the toothpaste away with 0.02% NaF (sodium fluoride) mouthwash. It's called Flux and tastes like mild mint and fluoride, so I reckon it's healthier than Listerine.