Toothbrush abrasion causes V-shaped notches in the lower third of the teeth, near the gumline. Notches made by toothpicks may occur between the teeth. In contrast, tooth erosion leaves a smooth, scooped out area on the tooth surface.
Both abrasion and erosion can make teeth more sensitive to sweet, hot or cold food and drinks. The problem may be worse if the dentin under the enamel is exposed. Dentin protects the innermost part of the tooth, the pulp, which contains nerves and blood vessels. Abrasion and erosion also can affect how your teeth look.