摘要：The aim of this study was to evaluate the results of primary and secondary prevention of first molars caries using pit and fissure sealants. Material and methods. The study included 247 children initially aged 6-7 years from Iaşi , with different socio-economic status, who had their first permanent molars sealed and the results were estimated periodically for 5 years. Results. The rate of successful sealants was 79.5% two years after the application and 68.5% at the end of the study. Only 9.4% of the sealed surfaces presented dental caries after 5 years and the DMFS (the Decayed, Missing, Filled, Surface) index of the occlusal surfaces had a reduced increase. The method allowed the differences in oral health status of children with different socio-economic status to be significantly reduced. Conclusions. This study has underlined the effectiveness of the primary and secondary prevention actions within first molars caries
关键词： schoolchildren, sealants, socio-economic status
