Veneers are strong, thin pieces of porcelain that are bonded to the teeth. They are used to repair chipped, decayed or stained teeth and may help in closing gaps between teeth. Veneers may also correct slightly crowded or overlapping teeth. If your teeth have discoloured with age, a veneer may improve their appearance. Veneers can also be used for cosmetic reasons instead of crowns. The tooth enamel needs to be ground down slightly in order to accommodate the veneer. Veneer preparations frequently need the use of local anaesthetic. Depending on the colour and shade, it may take more than one appointment to complete.