What about Silver diamine fluoride? It has been used for decades in Japan so it's not just hypothetical. http://www.nytimes.com/2016/07/12/health/silver-diamine

What about Silver diamine fluoride? It has been used for decades in Japan so it's not just hypothetical. http://www.nytimes.com/2016/07/12/health/silver-diamine-fluoride-dentist-cavities.html http://www.nytimes.com/2016/07/12/health/silver-diamine-fluo...