牙齿变色有多种,最常见是营养代谢性牙釉质发育不全症,四环素牙、氟斑牙和外染色素等. 营养代谢性釉质发育不全症。即一般所称的釉质发育不全症。由婴儿时期的全身性疾病,如高烧,抽搐或出疹等损害牙釉质的发育所引起.在几个牙齿的釉质上出现宽度基本相同的横行带状或扁圆形缺损,多数为一条,其宽度各人不一,缺损的位置很有规律,在越早萌出的牙齿上越靠近牙齿顶端.缺损的外形比较规则,边缘清楚,底部透出或露出牙本质呈黄褐色,并且比较容易受到龋蚀。有 A variety of tooth discoloration, the most common nutrition and metabolic enamel hypoplasia, tetracycline teeth, dental fluorosis and dye, etc. Nutritional metabolic enamel hypoplasia. The so-called enamel hypoplasia. Caused by the development of enamel, which is a generalized disease in infancy, such as high fever, seizures or rash, etc .. The majority of the transverse bands or oblate defects with the same width appear on the enamel of several teeth, The width of each different, the location of defects is very regular, the more eruption of teeth on the teeth closer to the top of the defect shape more rules, the edge clear, the bottom of the exposed or exposed dentin was brown, and more susceptible to caries . Have