Observations on gingival health in communities with and without school-based preventive programs.

The effect of school-based preventive programs was studied in 13-15 year old children living in 2 regions. In one region, those children who had tooth brushing exercises showed less plaque and gingivitis than control children, while in the other region the respective findings were equivocal. In general relatively low levels of caries prevalence were found. In the discussion part of the unexpected results are explained.