Generally well done, except for the very out of date information on fluoridation of municipal drinking water, which is since decades ago proven to be useless for teeth and potentially harmful in other ways, with highest potential harm in young children. Multiple other changes in dental care and dental products and social habits were found to have led to the cavity reductions erroneously attributed to drinking water fluoridation, and this is all well documented.

Decades of research aside, the simplest most common-sense debunking of any benefit is that fluoride needs significant contact time with the teeth to provide any benefits. At least as long as brushing thoroughly with an over the counter fluoride toothpaste, a couple of minutes or so. Prescription strength fluoride toothpastes typically recommend not rinsing for at least several more minutes for better effect - and emphatically say on the label DO NOT SWALLOW! Better yet is the 20-30 minutes a dental hygienist will say to avoid any drinking or eating, after they finish a cleaning and apply topical fluoride. Putting fluoride in drinking water that contacts the teeth for a second or two at most will have no benefits.