b : a feeling of nervousness, excitement, or fear that is created in a movie, book, etc. 1  The dramatic tension was very satisfying. 2  The author resolves the tension too soon.
You should know, however, that brushing your teeth after eating can sometimes affect your tooth enamel. According to the Mayo Clinic, if you've consumed anything acidic, you should avoid brushing your teeth for at least 30 minutes. Foods containing citric acid, like oranges, grapefruits and lemons, weaken tooth enamel. Brushing too soon after eating them can damage the enamel in its weakened state.
I don't think you need to wait too long after brushing before you whiten. You're right it's important that your teeth are clean. I believe, you can whiten within minutes after brushing as long as you rinse very well, to get all the toothpaste off of your teeth. Good Luck! October 16th, 2011.