Mouthwash

The third main type of mouthwash contains fluoride. Here, the evidence base is more complete, at least for those under 16. We know for certain that fluoride mouthwashes stop teeth falling out. But we also know that they don't do it very much. Pooled data from 34 different studies and almost 15,000 children shows that those at low risk of tooth decay avoid an average of one filling in two decades - and anyone motivated enough to swill for that long is already likely to be at low risk. Best guess is the effects are similar for adults, but no one knows for sure.
Full article in Guardian (click Link)