Our teeth have different colors as we grow older, since they tend to become darker as we age. We shouldn't confuse the color of our teeth with extrinsic pigmentation.
In fact, certain types of food such as: tea, coffee, red wine, carrots, carbonated drinks, cause pigmentation as tobacco does. This pigmentation should be removed with scale and polish and sodium bicarbonate jet.
The alteration of dental color can be the result of dental trauma and if thats the case, it is advised internal bleaching. Each case should be evaluated by the Dentist, for good advice on the best solution for each patient .