Over time, due to age, smoking, uncontrolled intake of colored food and drinks and some medications, our teeth become darker and are no longer as representative as they once were. Such teeth can be returned to the starting position by whitening and even two or three shades can get more. Then we are all happy, both the patients and us!
However, some patients took certain tetracycline drugs (antibiotics) as a child, which were woven into the structure of the dentin and painted the teeth gray-green. We can’t whiten such teeth so much that they are white. We have to admit that we are not so powerful and state that with our treatment we can only bring them a shade lighter, but in that color. For some patients, that is enough to make them happy.