I'm not sure if related, but I have found it interesting that when I'm 'on' round, I find that I don't have as much plaque built up by the end of the day as usual. I went as far as to test the theory and did not brush my teeth for 3 days 'off' round, brushed them clean and started 'on' round and left them without cleaning again for 3 days 'gross I know, but curious minds and such'. I found that as a guess I would say that 'on' round my plaque build up was a good 60% less then normal. I'm not sure what to make of it but either hg's are killing bad bugs in your mouth while chelating, or the plaque is acting like a shield for your teeth. Its interesting food for thought.