Does brushing your teeth help prevent cancer? (Probably not.)

If there's one thing emblazoned across every science writer's desk, it's the eternal quote "correlation is not causation". As if to prove the eternal validity of this quote, we have a study from Sweden that tracked oral hygiene and cancer deaths over a period of 24 years for 1,400 individuals. Lo and behold, there's a… » 6/15/12 8:30am 6/15/12 8:30am