black teeth
Introduction
Introduction First of all, the blackening of the teeth can be due to dental caries, mainly due to the participation of bacteria, the sugary food glycolysis produces acid and corrodes the tooth. After a long time, the teeth become soft, the tooth tissue disintegrates, and finally the black is formed. Caverns; may also be black because of the necrosis of the human body. Secondly, when the teeth of the human body are developing, the enamel of the surface layer is lack of calcium, phosphorus and other substances; the double or this period is affected by some harmful factors, which makes the teeth develop and is easy to cause discoloration of the teeth. Of course, adults can also turn our teeth into black because of smoking, coffee, etc. Finally, if we usually have too much fluorine in drinking water, it is easy to cause our teeth to change color and slowly appear black. Of course, if a child or a pregnant woman has taken a tetracycline, the tetracycline can bind to calcium ions in the tooth tissue to form a stable calcium salt of tetracycline, which is also liable to cause discoloration of our teeth.
Cause
Cause
Calcium deficiency in infants and young children makes the enamel rough and uneven, and it is easy to leave food debris. If the Lactobacillus in the mouth is attached to the surface of the enamel to form plaque, the bacteria in the plaque continue to decompose the food, produce a large amount of organic acid, and the teeth of the enamel are not fully developed, the color of the teeth will gradually turn black from white, and A little bit off.
Examine
an examination
Related inspection
Oral endoscopic oral X-ray examination of pulp electrical activity determination of pulp temperature test (cold fever diagnosis)
The teeth are black from the outside.
Diagnosis
Differential diagnosis
1. Discoloration of the teeth caused by pulp necrosis: If the teeth are traumatized, the pulp will be hemorrhagic and necrotic, and the teeth will become dark red, brown or blue-gray.
2, spotted enamel: commonly known as the yellow spotted tooth, drinking water per liter of water more than 1 / 1 million before the age of 5 will cause calcification and discoloration of the enamel structure. Light spotted enamel, white enamel or yellow-brown plaque on the surface of the enamel; severe tooth surface roughness, uneven yellow-brown, or even black, the teeth are crisp and fragile, and the treatment is more complicated. Light spot enamel doctors use dilute hydrochloric acid to rub the macular area to discolor, which can make the macula shallow, but pay attention to protect the gums when applying the medicine to prevent corrosion and burns. Heavier enamel enamel can restore the shape and appearance of the tooth with "plastic tooth veneer" or "light curing composite resin".
3, the drug causes tooth discoloration: the mother's late pregnancy or children less than 5 years old, taking more tetracycline, oxytetracycline antibiotics combined with calcium to form a yellow or grayish white tetracycline, earth toxin antibiotics combined with calcium to form a yellow or grayish white Tetracycline calcium complex, deposited in the structure of enamel and dentin through the pulp, makes the teeth after eruption yellow, dark gray or dark brown. The precautionary measure is to take as little as possible of tetracyclines. At present, tetracyclines in children have been included in the elimination of drugs.
