How long does it take for tooth decay to kick in by not brushing your teeth?
How long after you stop brushing your teeth does tooth decay kick in?
Microscopically, there is decalcification within 48 – 72 hours.
If the filthy acidic condition persists, then gradually it will start to become visible to your naked eyes as chalky white areas.
Over time, that starts to turn into brown decayed lesion.