You may already know that a veneer is a thin covering over another surface. In dentistry, a veneer is a wafer-thin layer of super-strong porcelain that convincingly substitutes for natural tooth enamel. When bonded to your teeth, veneers can create a natural-looking, beautiful new surface. That's because dental porcelain, like natural tooth enamel, is translucent and tough. But it doesn't stain like tooth enamel does.