Causes of tooth discoloration  

Why do teeth turn yellow? In fact, the color of teeth we see is not only the color of the surface of the teeth but also the color of the dentin that emerges through the enamel on the surface of the teeth. Baby teeth are milky white in childhood and gradually turn yellow as they age.

There are many reasons for tooth discoloration and yellowing, generally divided into two types: endogenous and exogenous:

Exogenous coloration is due to the existence of a variety of bacteria on the surface of the teeth, which secrete many sticky substances on the surface of the teeth, tea scales in daily diet, smoke stains, and certain minerals in drinking water and minerals in people's saliva. Plaque and calculus form on these sticky substances, gradually turning teeth yellow or black.

Endogenous coloration is formed during tooth development, such as the deposition of tetracycline in dentin, which will make teeth yellow, brown or dark gray, called tetracycline teeth; if there is too much fluoride in drinking water, it may also be Causes dental fluorosis, with white chalk-colored and tan plaques on the tooth surface; if the tooth nerve is necrotic, the combination of hemoglobin and bacterial breakdown products can also make the teeth black.

  Medical whitening method  

There are essentially only two methods of teeth whitening, one is chemical bleaching, and the other is dental veneers. There is also the method of teeth cleaning and sandblasting to restore the true color of teeth. The main chemical component of teeth whitening drugs is carbamide peroxide, which chemically reacts with the teeth through different placement methods, resulting in discoloration of the teeth. There are mainly cold light whitening, dental tray whitening, toothpaste whitening, gargle whitening, tooth whitening with internal medicine, ultrasonic teeth cleaning and so on.

  Common Teeth Whitening Methods  

  Cold Light Whitening  

Cold light whitening is the latest tooth whitening technology that is popular in Europe and the United States. It can not only remove the pigmentation on the surface of the teeth but also can penetrate deep into the teeth to achieve the effect of depigmentation. According to clinical experiments, using Huaer Dental's cold light teeth whitening technology, the effect can be increased by 5-14 color levels, which is not only better than similar products but also exceeds the whitening effect of home braces by more than 30%. The operation only takes 30 minutes, there are no side effects, and the whitening effect can be maintained for more than two years.

Indications: fluorosis, tetracycline, pigmentation, enamel hypoplasia, caries, dead pulp.

  Dental Veneers  

Veneer whitening is sticking a layer of veneer on the surface of the teeth to cover the discolored teeth. Although the teeth will turn white immediately after the veneer, it is also very natural and realistic, but it is easy to fall off and discolor, which can easily cause sequelae such as swollen gums, bleeding and inflammation; the resin veneer has a certain thickness, which will make the lips slightly convex, which will affect the appearance. The aesthetics have a certain impact, and the price is not cheap.

  Whitening adaptations and contraindications  

Adapt to the crowd

1. Mild to moderate tetracycline teeth, fluorosis teeth, or discolored teeth caused by other factors, hereditary yellow and black teeth, generally can obtain satisfactory results through a single cold light whitening treatment.

2. Severe tetracycline teeth, dental fluorosis, or discolored teeth and yellow teeth caused by other factors generally require more than two cold light whitening treatments (with an interval of no more than two weeks at most) to achieve a satisfactory whitening Effect.

3. Severe tetracycline teeth, fluorosis teeth, or discolored teeth caused by other factors with enamel dysplasia require multiple treatments of cold light whitening under the diagnosis of a doctor to obtain a certain improvement. Such patients can also be restored with porcelain teeth.

Taboo crowd

1. Dead pulp teeth fade quickly after bleaching treatment, and are not suitable for cold light whitening;

2. Whitening agents have no effect on fillings and porcelain crowns, so such patients do not belong to the cold light whitening indication group;

3. Severe tetracycline teeth, fluorosis teeth, or discolored teeth caused by other factors with enamel dysplasia may cause greater discomfort to the patient and are not suitable for cold light whitening;

4. People under the age of 16, pregnant women and patients with severe periodontal disease are not suitable for cold light whitening.