[Caries prevalence among students in the city of Winterthur: comparison with the city of Zurich and 16 communities in the canton of Zurich]. / Kariesprävalenz von Schülern der Stadt Winterthur: Vergleiche mit der Stadt Zürich und 16 Zürcher Landgemeinden.

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. The mean DMFT-value (permanent dentition) in 12-year-olds was 1.0 and was on a low level in a European comparison. The mean dmft-value (deciduous dentition) in 7-year-olds was 2.0. From 1971 to 2002, DMFT-values decreased by about 80% in Winterthur. The dmft-values decreased by about 60%. The splitting by nationality revealed a high caries prevalence in schoolchildren from the former Yugoslavia and Albania. A multivariate analysis showed no significant differences in caries prevalence between the schoolchildren of the city of Winterthur and other communities of the canton of Zurich.

[Caries prevalence among 5-year-olds in the city of Winterthur in the year 2001]. / Kariesprävalenz von 5-Jährigen der Stadt Winterthur im Jahre 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. The mean dmft-value was 2.42; of that 1.87 were untreated carious teeth (dt). Forty-five per cent of the children showed caries in the deciduous dentition. Twenty-one per cent of the children had high caries experience (5 or more dmft). Twenty-one per cent showed caries in deciduous incisors. In 4% of the children primary molars were missing. Splitting by nationality revealed great differences. On average, the Swiss children had 1.70 dmf-teeth; the ex-Yugoslavian and Albanian children had 7.84 dmf-teeth. Fifteen percent of the Swiss children had high caries experience; in contrast 65% of the ex-Yugoslavian and Albanian children had high caries experience.

[Caries prevalence among students in 16 Zurich districts in the years 1992 to 2000]. / Kariesprävalenz von Schülern in 16 Zürcher Landgemeinden in den Jahren 1992 bis 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%. The pit and fissure caries prevalence (DFS) of 12- and 14-year-olds decreased by 28% and 37%, respectively. In 2000, the mean DMFT-value of the 12- and 14-year-old schoolchildren was 0.90 and 1.27 respectively. In 1964, only few 7-year-old schoolchildren were caries-free; in the Nineties about half of the 7-year-olds had a primary dentition without caries. From the year 1992 to 2000, caries prevalence (dmft) in 7-, 8- and 9-year-olds increased by 64%, 22% and 31%. In 2000, the mean dmft-value of all 7-year-old schoolchildren was 2.45. The Swiss schoolchildren had 1.79 dmft; the schoolchildren from former Yugoslavia and from Albania had 6.89 dmft and those of other nations had 3.37 dmft. Possible reasons for the continuous caries decrease in the permanent dentition and the increase in the primary dentition are discussed. Additional measures in order to improve the situation in the primary dentition are proposed.