Mutans streptococci, the bacteria involved in causing tooth decay, multiply 30 times overnight if you haven't brushed your teeth before going to bed!
Tokyo, Feb 27, 2004
So for those of you who only brush your teeth once a day, please practice brushing at night, before sleeping instead of in the morning. To counter bad breath, gargle some mouth wash. Better still, cultivate twice-a-day brushing for the best practice dental hygiene :E