engleski

Fluoride uptake in sound enamel after different treatment with amine fluoride solution

The uptake of fluoride in dental enamel after topical fluoride treatment is considered to be an important factor in caries prevention, although the effects of tooth bound fluoride have not been clearly demonstrated. The aim of this in vitro study was to quantify the formation of structurally bound fluoride taken up by enamel after application of amine fluoride solution with different fluoride content and different frequency of use. Four enamel slabs were cut from buccal or lingual surfaces of 11 impacted human third molars and randomly divided into four groups. All surfaces of the slabs were covered with dental wax except for the enamel surface. Each of the three groups of slabs was shaken for 3 min. in an amine fluoride solution with pH of 3.8 (Aminfluorid otopina, Belupo, Croatia) and with one of the following fluoride concentrations and frequency of use; group A: 1% F twice a day; group B: 0.5% F three times a day and group C: 0.25% F four times a day. These treatments were repeated on 3 successive days. One group of slabs without treatment served as the control (D). Loosely bound fluorides were removed by 24-hour treatment with KOH after which the fluoride content in the enamel was determined after acid etching using a fluoride-sensitive electrode. The amounts of F and the surface areas of the slabs were used to calculate the structurally bound fluoride. The fluoride content in the enamel (etching depth about 20ľm) was: group A 23.0ą8.5mg/cm2, group B 20.0ą5.0 mg/cm2, group C 10.0ą6.7mg/cm2, group D 3.0ą1.2 mg/cm2, the latter differing statistically significantly from all other groups. As there was no statistically significant difference between groups A and B, it can be concluded that lowering the standard fluoride concentration by half, but with more frequent use, the effect on fluoride uptake in enamel could be similar.

nije evidentirano

nije evidentirano