no, nothing can replace flossing.
listerine does more than just kill bad breath, in fact it stinks to high heaven, but it goes a long way towards healthy gums too. i had a root canal done and thus had no sensation in that tooth. i apparently didn't floss around it well enough a few times and it irritated my gums. i was told to (duh) floss better and use listerine. since then the problem has stopped. although i've found out the crown is just wrong needs to be replaced now, i am most unhappy about that fact. i HATE going to the dentist and will do anything to avoid it. so if it means using weird mouthwash, so be it.