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Chronic fluoride poisoning is a physiological reaction to long term exposure to high levels of fluoride and is characterized by dental fluorosis, skeletal fluorosis, and kidney damage. Called also fluorosis. systemic fluoride a fluoride ingested in water, supplements, or some other form. See also fluoridation. topical fluoride a fluoride applied directly to the teeth, especially of children, in a dental caries prevention program.
Fluoride ions exist predominantly as hydrofluoric acid in acidic environments with a pH below 5.2. Fluoride ions corrode the glass. Therefore, the pH measurement with the glass electrode for a solution which includes fluoride ions is basically impossible. Although the useful life of the electrode may be shortened, however, the measurement with immersing the electrode in the sample for a given short time is possible.