[iamt2]

I used to be that guy; brush and floss after every meal from one checkup to another, and there was still buildup. Very morale-crushing. No longer.

Only habit change: I dropped net carbohydrates to 20g per day. I did that for a chronic condition, but the change in dental health was a pleasant side effect. My dentist told me he's never seen such a dramatic difference. Gum-inflammation was causing gaps between my teeth, and that receded to where he couldn't detect it any longer. I went from a teeth cleaning once every other month to once every four months, and that is only by personal choice to get what little buildup he can find (the cleanings are nearly perfunctory, about 10 minutes now). Yet my dental routine has worsened, as I no longer brush and floss after every meal (going to one meal a day at the end of the day also gave me time to brush and floss after that).

YMMV. I suspect a large genetic component, and dropping carbohydrates will impact dental health for some even with a modest drop to 1-200g net carbs per day, and not at all for others even down to 20g net carbohydrates.

[kaybe]

Is that only sugar or also starch?