This is partly cosmetic and partly aesthetic. The cosmetic aspect is to achieve a beautiful and attractive smile. The other is the removal of food and liquid stains on the surface of all teeth. Can be from red wine, coffee and tea stains. Smoking presents a more difficult damaging effect on all teeth along with damage to fillings and the structure of each tooth. Burn and brown teeth are very difficult to treat. Quite often involves drastic solutions such as veneers, crowns and repeated in office bleaching of the teeth in question.