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A COMPARATIVE STUDY OF PLAQUE ACIDOGENESIS IN INDIVIDUALS RESIDING IN COMMUNITIES WITH AND WITHOUT FLUORIDATED WATER.
Annual summary rept. 1 Nov 68-31 Oct 69,
OREGON UNIV DENTAL SCHOOL PORTLAND
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The ability of dental plaques to produce acid in response to a sugar rinse in fluoridated and non-fluoridated communities was indirectly evaluated by measuring plaque pH with an antimony electrode attached to a Corning pH meter. 144 seventh and eighth grade students were evaluated in Albany, Oregon shortly before this city fluoridated its water supply and again three months after fluoridation. 131 similar students were evaluated in Corvallis, Oregon, a city which has had fluoride in its water for about fifteen years. 181 students were evaluated in Lebanon and Canby, Oregon, communities without fluoride. In general it was found that Corvallis students produced much less acid than any of the other communities. This was statistically significant .995. Although less acid was produced in Albany three months after fluoridation than before fluoridation the difference was not statistically significant. Further tests in Albany will be needed to determine how long it takes before significant depression by the fluoride occurs. Author
APPROVED FOR PUBLIC RELEASE