Veneers are very thin layers of porcelain (ceramic) bonded directly on the outer tooth surface. Because of the minimal thickness of such restoration (0.3-0.6mm), the tooth is prepared (reduced)very slightly, almost only roughened, the intention being to preserve the natural enamel underneath the bonded veneer. Porcelain veneers can be totally transparent or slightly coloured to cover dental discolorations. Porcelain veneers are mainly used to correct tooth anomalies in relation to form (shape), proportion (length, width), color.