Fluoride Concentrations in Deciduous Teeth of Children Using Fluoride Mouthrinses

Analysis of exfoliated deciduous teeth from children living in both fluoridated and non-fluoridated areas and who used a 0.02% F rinse 5 times per week or a 0.1% F rinse one time per week revealed that significant fluoride was acquired only at a depth of 5 μm from the surface. Children who used the dilute F rinse in the non-fluoridated area acquired approximately one-third as much fluoride as teeth from the other groups. Enamel was not found to increase in fluoride concentration as more rinses were received but maintained the increase initially obtained.