Many factors causing tooth colored, mainly in the following categories:
Dental fluorosis, also known as dental fluorosis, or tooth enamel plaque. Incidence of this disease with regional characteristics, mainly because of excessive fluoride in drinking water caused. The mild cloudy opaque enamel surface of teeth, was chalk color; moderate leaving it yellow or brown teeth are yellow irregular patches; severe, except for color changes, accompanied by tooth enamel defects.
Enamel hypoplasia of 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 role of harmful factors of the teeth caused by developmental disorders. Light surface of the tooth enamel was opaque colored chalk flapping, loose rough, may, but was brown food coloring. Severe, tooth enamel defects may appear substantial, showing absence of nest-like or band, or no enamel covering. Tetracycline stained teeth during the tooth development, especially in children under 8 years of age or pregnant women, if taken tetracyclines (such as tetracycline, oxytetracycline, doxycycline, etc.), then easily lead to tooth discoloration, known as tetracycline stained teeth. This is because the drugs tetracycline tooth tissue with calcium ions combine to form solid calcium tetracycline, with age, color will gradually increase, about 18 years after becoming stable.
According to color depth, clinical can be divided into four degrees: once tetracycline, leaving it even the milk of their teeth yellow or light yellow; degrees tetracycline, teeth, ranging from leaving it uniform pale-brown or brownish shades; three tetracycline , leaving it a uniform depth teeth, ranging from pure gray, brown or gray and black; tetracycline four times, leaving it Huihe teeth black or gray, can be combined enamel hypoplasia, associated with tooth defects.
Opalescence teeth as an autosomal dominant genetic disease, rare. Unique purple blue teeth changes, exposure of dentin bright, translucent yellow-brown, easy to wear teeth, residual roots were severe, form.
Commonly known as cavities or tooth decay, dental caries, is due to the involvement of bacteria, acid and carbohydrate food glycolysis of dental erosion, over time soften the tooth, dental tissue collapse, forming black cavities.
Nonvital more discolored teeth due to caries or direct violence against bacterial infections, broken teeth, accidents, resulting in pulpal necrosis and discoloration.