The prevalence of caries in the primary dentition of children was significantly higher in Calgary, Canada, without fluoridated water, than in Edmonton, where the water is still fluoridated, according to a study published by the journal Community Dentistry and Oral Epidemiology.
Calgary and Edmonton are the two largest cities in the province of Alberta, with a population of about 1.2 million and 932,500, respectively. In Calgary, fluoridation began in 1991 and ceased in 2011, and fluoridation has existed in Edmonton since 1967.
