Veneers are thin pieces of porcelain shaped to cover a person's tooth. They're a popular choice for people who want to make slight alterations to their smile, such as altering the size, shape, or color of one or more teeth. To apply veneers, a cosmetic orthodontist shaves a thin layer of enamel off the patient's tooth. Then, he or she applies resin to the veneer and seals it to the tooth with a curing light. Veneers preserve more of the natural tooth than crowns and are more stain-resistant than bonding.