1. If your teeth are often subjected to the immersion and the baptism of coffee, soy sauce or tea, or you are a standard smoker, the results of your teeth covered with a yellow coat, how to brush white teeth whitening your best choice;
2. During tooth development calcification base If you are taking tetracyclines, resulting in the mineralization of dental hard tissue suppression, manifested as tooth discoloration or enamel hyperplasia, so that the teeth were yellow, gray or gray-black.
3. Mild to moderate tetracycline dental fluorosis, or discolored teeth caused by other factors, hereditary yellow teeth, usually the first treatment to obtain satisfactory results; because the whitening of the principle, not only the enamel until dentin shallow pigment replacement, there is dental equipment a role reduced so that the transparency of the lens, that is, from transparent to translucent, thus reducing the dentin color of revealing;
4. Severe tetracycline stained teeth, dental fluorosis, or discolored teeth caused by other factors (some of the moderate patients), it normally takes more than two treatment (interval of weeks to a month can be), will be granted to make doctors and patients shall not be more satisfied with the results. Usually after the first treatment on the VITA colorimetric board will have at least 4 to 5 Levels to improve, but the change is not intuitively; second treatment after the first time on the basis of at least four Levels improve, generally after the end of this treatment you can get to solve more satisfactory results.
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