Deep Stains
When teeth are stained intrinsically, that is, beneath the surface of the tooth, no amount of peroxide treatments to the surface of the teeth will get them white again. The only real way to whiten teeth stained deeply are to cover them with veneers or bonding. Or they can be crowned or capped. A veneer is when a dentist coats the surface of the tooth with an extremely thin layer of an acrylic substance, usually porcelain. In effect, the tooth is being painted over with a new surface. This is 100% effective, natural looking and will whiten any tooth. Bonding is somewhat similar to bonding, except it generally is not a 100% covering of the surface to the tooth. But it can do the trick it the stained part of your teeth are covered with a new white cover.
Some teeth that are discolored are also unhealthy, and so need to be basically replaced. That means the dentist will grind them down to stumps and cap them with crowns. This obviously will give you new white teeth.
Home-use whitening kits are professionally supplied and yield best long-term results. They include low concentration peroxide gel for hour-long treatment, or with stubborn stains overnight, if peroxide concentration is very low. Bleaching trays aid gel application.
Over-the-counter teeth whitener kits are the cheapest and most preferred options, containing bleaching gel with concentration lower than that of professionally supplied home-use kits. With one-size-fits-all trays, the result may be just whitening a couple of front teeth.
Some teeth that are discolored - Zahnärzte
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