the benefit of semiannual application of the sodium fluoride varnish duraphat and the silane fluoride varnish fluor protection was studied in 11 -- 13-year-old children with high caries activity and life-long exposure to fluoridated drinking water ( 1 -- 1.2 parts/10 ( 6 ) ) .
C0037508
sodium fluoride
C0016327
fluoride