FLUORIDE PROFILES IN DIFFERENT SITES OF APPROXIMAL SURFACES OF 2ND PRIMARY MOLARS AFTER TOPICAL APPLICATION OF ACIDULATED PHOSPHATE FLUORIDE GEL IN-VIVO
Y. Nishioka et al., FLUORIDE PROFILES IN DIFFERENT SITES OF APPROXIMAL SURFACES OF 2ND PRIMARY MOLARS AFTER TOPICAL APPLICATION OF ACIDULATED PHOSPHATE FLUORIDE GEL IN-VIVO, Archives of oral biology, 40(12), 1995, pp. 1157-1161
Thirty-four (17 paired) extracted second primary molars were obtained
from 17 individuals (9 boys and 8 girls) aged from 9 yr 2 months to 12
yr 7 months. A tooth on one side was extracted as a control, and an a
cidulated phosphate fluoride (APF) gel was then applied to the paired
contralateral second primary molar. Three months later, the experiment
al tooth was extracted. Nine sites were assayed by a microsampling tec
hnique from small areas of the approximal enamel surface. The fluoride
and phosphorus concentrations were determined by a fluoride electrode
and by colorimetric procedure, respectively. Fluoride concentrations
were higher in the teeth treated with the APF gel than in the control
teeth. The highest fluoride uptake was observed in the central area of
the approximal surfaces. Deeper areas (>10 mu m) bad a marked uptake
of fluoride as compared with surface areas (<3 mu m). Tt was concluded
that the APF gel application increased the fluoride levels of approxi
mal tooth surfaces, particularly the mid-central site, of second prima
ry molars, even at 3 months after application.