This Oral-B Pro Expert Enamel Shield acts as a protective barrier against acid erosion. Acids in everyday foods and drinks we love such as fruit juice and carbonated drinks can attack and dissolve the enamel on our teeth. Instead of cutting these foods out all together, Oral-B Pro Expert Enamel Shield helps protect teeth against this erosion, maintaining healthy teeth that look and feel great. Regular brushing can also prevent against cavities, plaque and gum problems. It also freshens breath and prevents against the build up of tartar.