Abstract

In an area with non-fluoridated water (F content, 0.061 ppm), serum fluoride concentrations as measured with an ion specific electrode were as follows: controls (N = 13), 0.0127 ppm + 0.0057 (mean + SD); renal insufficiency (N = 10), 0.0452 ppm + 0.0151; chronic hemodialysis (N = 11), 0.0424 + 0.0343. The concentration in renal patients is about one-third of the one observed during F treatment for osteoporosis; it might therefore influence bone turnover. Fluoridated salt, tooth preparations and black tea were the main F sources in the patients studied.

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