Ajp. Van Strijp et al., In situ fluoride retention in enamel and dentine after the use of an aminefluoride dentifrice and amine fluoride/sodium fluoride mouthrinse, CARIES RES, 33(1), 1999, pp. 61-65
The aim of this in situ investigation was to study the effect of an amine f
luoride/sodium fluoride mouthrinse (total F = 250 ppm) in addition to an am
ine fluoride dentifrice (F = 1,250 ppm) on the amount of acquired fluoride
in enamel and dentine. In the partial prosthesis of 12 participants a combi
ned specimen of slightly demineralized enamel and dentine was placed. Durin
g two consecutive experiments, each lasting 3 weeks, the participants used
an amine fluoride dentifrice alone or in combination with a fluoride mouthr
inse, After the in situ period the specimens were retrieved and both,the en
amel and the dentine specimens were analysed for the amount of KOH-soluble
fluoride and structurally bound fluoride. The results showed a significant
increase in both KOH-soluble and structurally bound fluoride in enamel and
dentine when a fluoride mouthrinse was used. Whether the rinsing procedure
was per formed immediately after toothbrushing or with a delay of 2 h did n
ot influence the results. Furthermore it was shown that dentine acquired su
bstantially more fluoride than enamel during the experimental period. The r
esults indicate that a fluoride mouthrinse used in addition to a fluoride d
entifrice may have a beneficial effect on the protection of enamel and dent
ine against caries.