I seem to have the same problem? I have excellent dental health and visit the dentist regularly every six months for a cleaning. I was recently there (between checkups due to sensitivity) and asked about something I felt on my teeth, and it was PLAQUE buildup...very gross - he took pictures inside my mouth go show me.

I have never previously had this problem, and given some of the other responses, I think it might have something to do with low carb eating. Not a big deal though, dentist made a note on my chart to come in for cleaning three-four times per year rather than twice!

Froufie