The monitoring of oral health of schoolchildren aged 12–14 years during the three years intervention aimed at increasing the iodine and fluoride intake was accompanied by a questionnaire inquiry to oral health behavior, attitudes to oral care and fluoride intake. Results showed that the intervention increased the frequency of dental examinations and the percentage of preventive services during dental visits. The oral health knowledge increased, especially due to the increased role of oral health education in schools. The most of children used fluoridated toothpastes and the percentage of children using fluoridated mouthwashes rose. In the onset of intervention only 6 % of children were given fluoridated tablets and this count even decreased during the study. The same payed for the implementation of fluoridated salts in families. Drinking habits showed changing trend towards the preference of bottled waters, cola and mineral waters from tea and lemonades. The administration of fluoride tablets and the anxiety to dental treatment correlated positively with the value of DMFT.

        Key words: preventive program – oral health behavior – fluoride intake – age 12–14 years – questionnaire