Brushing Teeth while fasting
Will brushing teeth break your fast?
Praise be to Allaah
If tooth paste does not get into the throat, then the fast is not broken. However, it would be better to use tooth paste at night and to Sewaak at day time.
Also see the book "70 Matters Related to Fasting" .
May Allah guide us to his obedience.
Sheikh Muhammed Salih Al-Munajjid