Which component on teeth allows for fluoride uptake?

The acquired pellicle and dental plaque play significant roles in the uptake of fluoride by teeth. The acquired pellicle is a thin film of proteins that forms over the enamel surface immediately after tooth cleaning. This pellicle acts as a barrier and provides a substrate that improves the adherence of fluoride ions to the tooth structure. When fluoride-containing products, such as toothpaste or mouth rinses, interact with the pellicle and plaque, fluoride ions can be absorbed more effectively into both the enamel and dentin.

Moreover, plaque acts as a reservoir for fluoride. As the fluoride ions become incorporated into the plaque, they can gradually diffuse into the tooth structure, enhancing remineralization and offering enhanced protection against decay. This fluoride uptake is essential for strengthening enamel and preventing demineralization, especially in areas susceptible to caries.

Other components, such as dental calculus, do not have the same role in fluoride uptake, as calculus is primarily mineralized plaque that is no longer active in the same way. Stains on the teeth and tooth enamel alone do not facilitate fluoride uptake effectively in comparison to the action of the acquired pellicle and plaque.