When I am doing an examination I often note teeth that have potholes, and recommend repairing them with bonding material. Potholes are little perforations in the enamel of teeth ,usually located at cusp tips of posterior teeth or the incisal edges of anterior teeth. The enamel is lost and a depression in the tooth gradually develops, since exposed dentin wears at a faster rate than enamel. Over time, the enamel rods surrounding the pothole get undermined and minute pieces of enamel chip off resulting in slowly enlarging potholes. The potholes get deeper and get broader.
If a small composite is placed in the pothole than the continued erosion of the dentin can be eliminated(for the time being) and the filling functions as"artificial enamel". The preparation of the potholes prior to restoring them is minimal and no local anesthesia is necessary. This sort of dental care falls under the category of minimally invasive dentistry.