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, 70 (4), 272-8

Retention of KOH-soluble Fluoride Formed After Application of a SnCl(2)/AmF/NaF Containing Mouth Rinse Under Erosive Conditions

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Retention of KOH-soluble Fluoride Formed After Application of a SnCl(2)/AmF/NaF Containing Mouth Rinse Under Erosive Conditions

Florian J Wegehaupt et al. Acta Odontol Scand.

Abstract

Objective: Application of SnCl(2)/AmF/NaF containing mouth rinse showed good protection against erosion. The aim of the study was to evaluate if this is due to the amount of KOH-soluble fluoride (KOHsF) formed or its resistance under erosive conditions.

Methods: One hundred and fifty bovine enamel samples were allocated to five groups (n = 30) and were once eroded in 0.05 mol/l citric acid (5 min). Samples were stored in artificial saliva for 4 days. Samples of two groups (erosive-SnCl(2) + erosive-NaF) were eroded 6 × for 5 min. The remaining samples were stored in aqua dest deionised water. Each day the samples were treated twice for 2 min with 1 ml SnCl(2)/AmF/NaF-solution (erosive-SnCl(2);neutral-SnCl(2)/AmF/NaF) or NaF-solution (erosive-NaF;neutral-NaF). The fifth group remained untreated (control). On day 5, 10 samples of each group were used for determination of KOHsF (series 1). The remaining samples were again eroded (erosive-SnCl(2) + erosive-NaF) or stored in artificial saliva (neutral-SnCl(2) + neutral-NaF). KOHsF of another 10 samples of each group was measured (series 2). The last 10 samples of each group were also treated as described above and the amount of KOHsF was measured (series 3).

Results: In each series 1-3 KOHsF in group erosive-SnCl(2)/AmF/NaF were significantly higher. No significant loss of KOHsF between the series 1-3 was observed (except for control).

Conclusion: SnCl(2)/AmF/NaF containing mouth rinse revealed a better formation of KOH-soluble fluoride as the NaF-solution, although the applied fluoride compound has no influence on the stability of the KOHsF under erosive conditions, leading to the conclusion that the resistance of KOHsF is not responsible for the difference in the protection against dental erosion.

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