1 um 100 60 45 30 15 0 Meanpercentagesurface microhardnessrecovery Pronamel (1450ppm NaF) A leading toothpaste (1450ppm NaF) Placebo (oppm F) P<0.001 Pronamel is proven to reharden acid-softened enamel and provide ongoing protection from the effects of Acid Wear: 3 Low abrasivity 3 Neutral pH (7.1) 3 SLS*-free