Dry cupping does not break the fast of one who is fasting, for dry cupping does not involve extracting blood from the fasting person, therefore the process which causes the fasting person to become weak is not present.

If the amalgam of the filling is mixed with oil of cloves to soothe the nerve, then this does not invalidate the fast, even if you notice the taste of cloves, because nothing leaches out of the filling, or it is a very small amount that mixes with the saliva and cannot be expelled, so it is overlooked.