What are suitable for whitening teeth?

1. Dental fluorosis: mainly because of too high fluoride content in drinking water. Those with mild cloudy opaque enamel surface of teeth, was chalk color; moderate who appear before the yellow or brown teeth irregularly shaped patches; severe, except for the color change, but also with the tooth surface enamel defects.

2. Tetracycline: In the period of tooth development, especially for children under 8 years old or pregnant, if taking the tetracycline class of drugs (such as tetracycline, oxytetracycline, doxycycline, etc.), is easy to cause discoloration of the teeth, known as tetracycline stained teeth. This is because the tetracycline class of drugs with tooth tissue calcium ions combines to form dental instruments a stable tetracycline calcium, age, color will gradually increase, about 18 years of age tend to be stable.

3. Pigmentation: some colored food, including tea, coffee, soy sauce, and cigarettes, a long time, because without a good teeth cleaning habits, the pigment will gradually deposited even deeper into the tooth, making the surface of the teeth begin to yellow, black. It's like a long white dress was stained, how to clean white can not put it back in, like, the general scaling method is difficult to make stained teeth and then restore the original white.

4. Enamel hypoplasia: the teeth in the development process, the surface of the enamel due to lack of calcium, phosphorus and vitamins A, D and other substances; or by the effects of harmful factors of the teeth caused by developmental disorders. The light surface of the tooth enamel was opaque chalky color, loose and rough, which was due to brown food coloring. Severe cases may be substantial tooth surface enamel defects, defects were nest-like or ribbon, or even no enamel covering.

5. Dental caries: commonly known as cavities or tooth decay, is due to the involvement of bacteria, sugar and food acid corrosion of glycolysis tooth, causing tooth to soften over time, dental tissue collapse to form black cavities.

6. Death of vital teeth: usually caused by deep caries or direct violence against bacterial infection, broken teeth, accidents, resulting in damage to the pulp necrosis and discoloration.