Most adults will benefit from fluoride treatments. When your teeth are polished a minute amount of fluoride rich enamel is removed, and the application of fluoride following the polishing helps to re-establish that fluoride seal. Fluoride also acts to help re-mineralize any de-calcified areas and areas of sensitivity, like exposed roots and also has a bacteriostatic property, which means it keeps bacteria from multiplying. If it has been a long time since you’ve had any cavities, and you have few or no dental fillings, no root exposure or sensitivity it may be OK for you to forgo the fluoride on occasion.