本文着重介绍了变色牙漂白的方法、适应症、操作及其变色原因。变色原因:青少年牙齿变色往往是由四环素引起的。在婴幼儿期摄取四环素常被骨和牙齿吸收。初期牙齿呈黄色,由于光照逐渐变为晴褐色。在动物实验中给母体四环素可引起胎儿牙齿变色。氟过多也可引起斑釉牙或使釉质缺损。成年人的无髓牙的釉质透 This article focuses on the methods of discoloration of bleaching teeth, indications, operations and their causes of discoloration. Discoloration Reasons: Teen teeth discoloration is often caused by tetracycline. Tetracycline is often absorbed by bone and teeth during infancy. Initial teeth yellow, due to light gradually become clear brown. In animal experiments to the mother of tetracycline can cause fetal teeth discoloration. Excessive fluoride can also cause spot glaze or enamel defects. Adult toothless enamel penetration