[The effectiveness of preventing caries in the first permanent molars].

A total of 297 children aged 5-7 whose first permanent molars appeared in various periods were followed up. Local prevention of caries was carried out in these children with Soviet fluorine lacquer and sealing of fissures and anatomic hollows in molar masticatory surface. The efficacies of these two prevention methods proved to be different. In children whose first permanent molars appeared early or late fissure closing with vitacryl proved to be effective whereas in those whose molars appeared in time both methods were effective.