Yes, yellow teeth are normal, but not healthy, in fact, yellow stains tend to do damage to your teeth and can cause damage to your enamel. This is caused when poor hygiene is practiced causing plaque and tartar build up to create a yellow hardening coating. Excessive fluoride either from environmental sources (naturally high fluoride levels in water) or from excessive use (fluoride applications, rinses, toothpaste, and fluoride supplements taken by mouth ) can cause teeth discoloration. Certain foods and drinks can cause teeth stains, and tooth discoloration is also a product of several biological factors, including the transparency of your tooth enamel.
For example, coffee, tea, colas and red wine, when consumed over time, produce stains on teeth that can result in yellow, brown, green or orange discolorations. Most of all lifestyle choices we have control over, other causes of yellow teeth we tend to have less control over and these will make our teeth appear yellow. Because there is natural variation in enamel thickness and dentine color, natural tooth color can vary from grey to yellow to white, as shown in the natural color guide used most commonly by dentists, the Vita Shade Guide.
So the question remains, what is the best solutions when it comes to yellow teeth when you are in the beginning stages or at the point where it seems nothing can be done? Whether the discoloration is due to staining or other factors, several over-the-counter (OTC) products can improve tooth color, and your dentist can also offer preventative advice on how to whiten yellow teeth. The best way to avoid extrinsic stains is to brush your teeth right after eating foods that can cause discoloration, and to make sure you’re brushing your teeth at least twice a day and flossing. The most common aging effect on the teeth is the thinning of the enamel, exposing more of the natural dentine color and in turn yellowing the look of the tooth. Provided that your discolouration is not due to inadequate enamel exposing the dentin, tooth whitening (bleaching) is often the most effective treatment for yellow stained teeth. Professional teeth whitening can break up yellow stains and discolorations on your teeth, leaving you with a brighter smile.