Unlikely, most people these days brush at least once a day which has several hundred times the concentration of fluoride as water. (~1300ppm vs ~1ppm in fluoridated water). I'm sure it would go up a bit tho especially in children who often have questionable brushing practices.
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Over that decade did they see a massive increase in tooth decay? If not, why even bother with fluoridation at all?
Unlikely, most people these days brush at least once a day which has several hundred times the concentration of fluoride as water. (~1300ppm vs ~1ppm in fluoridated water). I'm sure it would go up a bit tho especially in children who often have questionable brushing practices.
dupe: https://news.ycombinator.com/item?id=33292353