Veneers are thin shells intended to cover the front side of teeth to hide stains, chips, decay, or irregularities. A dental technician uses a model created by a dentist to make a custom shell out of special materials. Because veneers require removing some enamel, they are usually permanent. Your dentist will typically recommend avoiding food and drink that will stain your veneers. Veneers can chip or crack, but overall the results are worthwhile and many people are thrilled with their new smile.