Effects of fluoride 0.05% oral rinsing solution upon incipient permanent dental caries Fluoride 0.05% oral rising solution has positive impact for remineralization, prevents and neutralizes incipient carious lesions D1 and D2 in permanent teeth: - Fluoride 0.05% oral rinsing solution helps reducing incipient caries rate (lesion levels D1 and D2) from 65.5% pre-intervention down to 39.0%, dental caries rate (levels D1, D2, and D3) from 67.5% down to 53.8% after 18 months of intervention.