A more serious kind of stain is that which becomes embedded into the enamel. This is often the result of smoking too much. Nicotine stains the teeth badly, with the stain going deep into the enamel. Caffeine from drinking too much coffee is another cause of brown teeth. They are not decayed, but the stain requires special treatment by the orthodontist. An application of peroxide gel that is left on for a specific period of time is needed to deal with these stains.

Another really bad stain comes about by the ingestion of a certain antibiotic when the teeth were forming. Tetracycline is the baddie in this case, and causes a nasty grey stain to become part of the tooth structure. It is almost impossible to bleach this stain out, though some small improvement can be seen with bleach. But having porcelain veneers fitted is the only thing to make the affected teeth look really white.

Get information on professional tooth whitening with d-spa dentist Melbourne (http://www.d-spa.com.au).