Does swallowing food remains between teeth spoil sawm (fasting)? Please mention the case when it is done intentionally, unintentionally, and intentionally because you couldn't manage to remove the food remainings.
Brief speaking, swallowing intentionally the thing (food…) which has remained between the teeth, it spoils or breaks the fast (Sawn)
(But concerning swallowing unintentionally, it seems can be related to eating unintentionally which doesn’t break or spoil the fast.)
Eventually, as the last past: Whoever who intends to fast, it is not necessary for him/her to use tooth-pick before the Azan. But his/her fasting would be broken if s/he knows (sure) that the remained food which have remained between the teeth would be swallowed in case that s/he doesn’t use the tooth-pick. / Even as wajib precaution (Ehtiat) it ought to be redo (do its Qaza) even if it has not been swallowed. (But it would be wajib if it has been swallowed) / notice: these are related to the case of being sure that the food will be swallowed in the case that you do not use the tooth-pick. But in the case of probability is not like that and doesn’t seem…
(According to Imam Khomeini and Imam (ayatollah) Khamenei) as two Shia Marja'al-Taqlids)
But I guess the view of Sunni brothers is pretty the same that eating or swallowing unintentionally won’t break the Sawn. (Although eating intentionally will spoil the Sawn)