[Caries prevalence among students in the city of Winterthur: comparison with the city of Zurich and 16 communities in the canton of Zurich].

The aim of the present survey was to assess the caries prevalence in schoolchildren of the city of Winterthur in the year 2002. A simple random sample of 1000 schoolchildren was drawn. 65% of the children participated in the standardized investigation.

[Caries prevalence among 5-year-olds in the city of Winterthur in the year 2001].

The aim of the present study was to assess the caries prevalence of 5-year-olds in the city of Winterthur in 2001. By simple random sampling 350 children were selected. Two-hundred-and-ninety-one of the children (83%) participated.

[Caries prevalence among students in 16 Zurich districts in the years 1992 to 2000].

Standardized dental examinations of schoolchildren were regularly carried out since 1964 in 16 rural communities of the Canton of Zurich. In 1964, there were no 14-year-old schoolchildren free from caries; in the Nineties about half of the 14-year-olds had a caries-free permanent dentition (DMFT = 0). From the year 1992 to 2000, the caries prevalence (DMFT) of 14-year-olds decreased once again, by 31%.