i brush my teeth sometimes and i go to the dentist. yet my teeth are still yellow with a tint of black, and crooked. and apparently ive still got a baby tooth.
Are you with a private health fund? Get your teeth professionally whitened. It's free.
I took a rather unpleasant fall last year and my tooth chipped. There was no bleeding, it didn't hurt, just chipped. Apparently this is because my teeth are very brittle.