[Periodontal disease prevalence (CPITN) in the adults of an F-optimized drinking water area].

The prevalence of periodontal diseases has been determined by means of CPITN in 35- to 44-year-olds (N = 330) residing for more than 26 years in an F-optimized water area and compared with samples taken of people of the same age in 14 county towns of the German Democratic Republic (N = 1261) and also the Spremberg district (N = 1,116). A relation with the systemic availability of fluoride could neither be deduced from the frequency of calculus nor the prevalence of periodontitis.