Is it normal to have black teeth?
It started a few years ago.my teeth were black again.it had happened before,when i was little.(my grandma was obsessed,by the way.)so then i started to worry.when i was younger,it did not go away for a while.i brush my teeth twice a day,and floss once a day.but it has'nt gone away ever since!my dentist did not know what to do.is it normal?please,let me know!!!!!!!!!!!