ProFluoride (5%) fluoride treatment is a naturally occurring element that can help to strengthen teeth and prevent tooth decay. If necessary, Dr. Simon will recommend an in-office fluoride treatment. After polishing away stains, our dental care team will apply fluoride by using a tray that looks like a mouth guard for one to four minutes. Fluoride treatments help all teeth and help to prevent decay in both children and adults. ProFluoride is also good for sensitive teeth.