What causes tooth discoloration?
There are many causes. The most common include aging and consumption of staining substances such as coffee, tea, colas, tobacco, red wine, etc. During tooth formation, consumption of tetracycline, certain antibiotics or excessive fluoride may also cause tooth discoloration.

How to prevent teeth discoloration?
By making a few simple lifestyle changes, you may be able to prevent teeth discoloration. For example, if you are a coffee drinker and/or smoker, consider cutting back or quitting all together. Also, improve your dental hygiene by brushing and flossing regularly and getting your teeth cleaned by a dental hygienist every 6 months.

If your teeth appear to be an abnormal color without ready explanation, the abnormal tooth color lasts despite following good oral hygiene practices, and if other symptoms are also present, make an appointment to see your dentist.