Re: Stupid question..how will I know if I have cavity?
Plaque is not black. And there's no way to know if you have a cavity without seeing your dentist. Some cavities will hurt if they've been there for awhile, but most will not, and the only way you know you have one is either your dentist will see it while looking at your teeth, or with an x-ray. I assume you DO go to the dentist every 6 months, correct? If you don't, then yes, those could be cavities you're seeing - and feeling - because you've left them long enough to become visible. The only way to know for sure is to see your dentist, as cavities left too long can result in either root canals or lost teeth.