Using a novel device capable of generating plaque in vivo on a natural enamel substrate, it has been possible to determine fluoride profiles from the saliva–plaque interface towards the enamel surface. Fluoride profiles in dental plaques tended to fall from the saliva–plaque interface towards the enamel. The device also offered the possibility of examining fluoride distributions after pre–treatment of the enamel with fluoride in vitro. Fluoride profiles were determined in plaque generated in vivo on enamel surfaces, which had been previously treated with a 900–ppm fluoride solution. The results showed the previously reported fall from the plaque surface, but in addition, a further rise towards the enamel surface was seen. The data imply that enamel loaded with fluoride can release some of this fluoride back into the plaque and may act as a fluoride reservoir.

Keywords:
Biofilm, Dental plaque, Fluoride
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2000
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