What you see in the photo above is a typical example of dental erosion. The patient was concerned because the teeth looked yellow at the gum line and although she whitened her teeth to try to get rid of the discolouration, it was not successful.
This is because the enamel on the tooth at the gum line has been dissolved away by acid. What you see is the underlying tooth structure, dentin, which is yellow. The dentin is less resistant to acid erosion so it will wear away even quicker than the enamel.
I restored the teeth with the use of dental composite material. The shade is matched to the tooth for an esthetically pleasing result. More importantly, the dentin is now covered to prevent further erosion from acidic foods.
The most acidic foods are often citrus foods. It is a good idea to cut down on these if you have them daily. Other foods and drinks to be careful with include: carbonated drinks, wine, pickled foods, yoghurt and sports drinks.
Please see our previous post about acid erosion for more information.