The study compared the teeth of Grade 2 children in Calgary to those in Edmonton, where fluoride is still added to drinking water. While there was a general decline in dental health in both cities, the results were markedly worse in Calgary.
University of Calgary researcher Lindsay McLaren, who is the lead author of the study, said the results show a clear cause and effect.
“This study points to the conclusion that tooth decay has worsened following removal of fluoride from drinking water," she said in a release
The results were published in the latest issue of Community Dentistry and Oral Epidemiology.