[stjohnswarts]

I think you mean tarter, not plaque. Plaque takes a while but you obviously will feel tarter only teeth at the end of any day if you've had sugary or carby foods. White bread starts breaking down into sugar as soon as it hits your mouth due to enzymes in saliva.

[grupthink]

Plaque accumulates on teeth within hours. After a few days, it becomes tartar.