<unk>  of the front teeth is one of the most common reasons people seek dental care. However, many people with teeth of normal shade ask for them to be whitened. Management of<unk>  depends on the cause. Most<unk>  is harmless and may or may not be of cosmetic concern<unk> e individual. In other cases it may indicate underlying pathology such as pulp necrosis or rarely a systemic disorder. Most extrinsic<unk>  is readily removed by cleaning the teeth, whether with "whitening" (i.e., abrasive)<unk> paste at home, or as treatment carried out by a professional (e.g., scaling and/or polishing). To prevent future buildup of extrinsic stains, identification of the cause (e.g., smoking) is required. Intrinsic<unk>  generally requires one of the many types of<unk>  bleaching. Alternatively the appearance of the<unk>  can be hidden with dental restorations (e.g., composite fillings, veneers, crowns).
Tooth discoloration
Skin whitening
Oral pigmentation
Green nails
Blue nails
Muscle atrophy
Tooth loss
Dark skin