A field trial on semi-annual fluoride varnish applications among the special needs schoolchildren.

This study assessed cariostatic effect of one fluoride varnish Duraphat among children with a low caries risk and compared this effect to group of a moderate caries risk, belonging to same ethnic group with same socioeconomic background. Results of this study showed that fluoride varnish had cariostatic effect in a group of children with a moderate caries risk but not among those with a low caries risk.