If you don’t know what veneers are, this is how Colgate’s website succinctly puts it: “A veneer is a permanent change used to correct tooth imperfections, such as stained or chipped teeth. Veneers are thin porcelain or composite resin coverings that are bonded to the front surface of a tooth using dental cement.” Most veneers are permanent because they require some of the tooth’s enamel to be removed before application and have to be replaced every decade or so.