Fluoride? Is there ever enough?

A very common finding during exams is recurrent decay. Either at a crown margin (the junction of the crown and the tooth) or along the interface of the tooth and a filling. Options at this point are removing the decay and "patching" the margin with restorative material or removing the crown and redoing it. We feel that a third option is prevention of the decay in the first place. We have been recommending a prescription strength toothpaste (5000ppm of fluoride vs 1000ppm of fluoride). The prescription can be filled at any pharmacy at a reasonable cost. We recommend using your regular toothpaste in the morning and the prescription toothpast right before bed. Brush as normal and do NOT rinse with water...Let it sit on your teeth overnight....Another idea is for those that use an occlusal guard/night guard....place the fluoride toothpaste in the appliance and let the teeth marinade in fluoride overnight....