Inhibiting effect on demineralization of permanent root surfaces after different topical application of fluorides and a solution containing Fe- and Al-ions.

Fifteen roots were used in this study to compare different topical fluoride compounds on the inhibiting effect of artificial root surface carious lesions. A 2% NaF-solution, Duraphat and a test solution-containing Fe+3, Al+3 with and without fluoride were tested. The results indicated that only the test solution independent of fluoride was able to increase acid resistance. No differences could be observed between the controls and the surfaces treated with the other fluoride agents. The test solution thus seem to be applicable against root surface caries.