Development of artificial carious lesions in enamel after F-varnish (Duraphat) and F-Fe-Al-solution treatment.

An acidified gel system was used to study the development of initial enamel lesions using a test solution containing fluoride in combination with iron and aluminium ions compared to a fluoride varnish (Duraphat). The experiments were performed on both permanent and deciduous teeth. The results showed that the fluoride varnish was superior in retarding the development of initial enamel lesions compared to the test solution. The expected positive effect of trace elements in combination with fluorine could be demonstrated in this experiment. Deciduous enamel showed less acid resistance than permanent enamel under similar experimental conditions.