What are Dental Veneers? Dental veneers are customized shells made of porcelain or a composite resin that fit over your teeth to improve their appearance. Veneers are especially helpful in improving your smile if you have teeth that are chipped, stained or misshapen. The purpose of veneers is generally cosmetic, but you may have them fitted as part of an overall dental makeover that includes treatment for gum disease. Dental veneers are stain-resistant resin-based composite