Gel-Kam Fluoride Preventive Treatment Gel, Fruit And Berry Flavor, 4.3 Oz
Price: $22.93
Colgate Gel-Kam
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I've used Gel-Kam for years, whenever I have a sensitivity issue with my teeth. It always works, and also adds extra cavity protection as well. Using it for just a week or so does the trick, so a tube last a very long time using it just for sensitivity.