Very few people have the gleaming white teeth seen in toothpaste ads.
Most normal, healthy teeth are, in fact, somewhat gray or yellow.
There are a number of problems that can cause tooth discoloration.
For example, pigments can be incorporated into the enamel in some situations.
Similarly, before birth and during the tooth-forming years of infancy and childhood, exposure to the antibiotic tetracycline can lead to a yellow or brown discoloration.
Finally, defects in the development of the enamel, often caused by serious vitamin and mineral deficiencies, can lead to pitting of the enamel and uneven color.
Far more common, however, is staining from smoking, chemicals, or foods.
If smoking is a factor in your case, the best solution - and the best thing for your long term health - is to quit.
Another very common cause is apparent discoloration where there has been excessive plaque buildup and the plaque has been calcified.
Good oral hygiene is important for health and appearance and requires regular brushing and flossing.
Ideally you should brush each time you eat, to remove food particles.
These particles provide the sugar that bacteria in the mouth ultimately break down to form an acid that contributes to the formation of cavities.
Even thorough brushing, however, can leave particles between teeth and near the gum line; if not removed, plaque will build up, gum may become unhealthy, and cavities can form.
Daily flossing will clean the areas the brushing misses.
Your oral hygiene is not complete without it.
You should be seeing your dentist twice a year for professional cleaning.
He or she can also help you with your brushing or flossing technique, examine your teeth and mouth, and tell you if the color of your teeth is within the normal range or if it signifies a problem requiring special care.