DMF gives the DMF count per 100 examinees for flourish content x (in parts per million, ppm) need to know how much flouride must be used to get desirable DMF counts, and what level are considered safe? the usual fluoride level added to drinking water is 1 ppm, what DMF count does that correspond to? what level of fluoride would provide a DMF count of 250? DMF = 200 + 100, x .25 x thanks

Question

DMF gives the DMF count per 100 examinees for flourish content x (in parts per million, ppm) need to know how much flouride must be used to get desirable DMF counts, and what level are considered safe? the usual fluoride level added to drinking water is 1 ppm, what DMF count does that correspond to? what level of fluoride would provide a DMF count of 250? DMF = 200 + 100, x > .25 x thanks