Dental porcelain is used for crowns, bridges and veneers. Common indirect restorations include inlays and onlays, crowns, bridges, and veneers. Dentists also recommend using thin porcelain veneers to strengthen worn teeth. Materials used for veneers may include composite and porcelain. Porcelain veneers are more durable and less likely to stain than veneers made of composite. Royal furniture was more elaborate, making use of inlays, veneers and marquetry. A personal makeover might also include plastic surgery, dental veneers, or contact lenses. They are also used as inlays, onlays, and aesthetic veneers. Non-permanent dental veneers, which are molded to existing teeth, are a feasible option as well. The face veneers are thicker than traditional cabinet grade plywood. Often, decorative wood veneers are added as a surface layer. Occasionally, trees produce wood with a wavy grain, greatly increasing the value for decorative veneers. Wood veneers are typically sold by the square foot. It is used in the manufacture of furniture, joinery, veneers, luxury flooring, and boat building. Ash veneers are extensively used in office furniture.