Foams
In 1993, Sodium Fluoride (NaF) foams were introduced to the United States market. These fluoride foams only
underwent a short evolution and include acidulated phosphate foam (APF) for deep infiltration, and neutral fluoride foam
for restorations or individuals sensitive to acidic fluorides. Neutral foams provide fluoride without damage to the surface of
restorations and are a good alternative for acid-sensitive patients. Indications for fluoride foams are similar to other topical fluorides (i.e.,desensitization and cavity prevention), but they are most effective in primary