Fluorosis can cause tooth discoloration or surface irregularities.
氟中毒会导致牙齿变色或表面缺陷。
There's another reason to watch what you eat - some common foods can cause tooth discoloration.
由于一些常见的食物可能会导致牙齿变色，所以你得注意你所吃的东西。
Over-whitening can also cause teeth to become thin and brittle and can lead to high sensitivity and discoloration as tooth enamel becomes translucent.
美白牙齿过度，会使牙齿变得薄弱。同时，由于牙釉质变为半透明状，会导致牙齿高度敏感、变色。
The patient had been in childhood (calcification period of tooth development) using the tetracycline class of drugs, resulting in discoloration of the teeth.
此患者曾在儿时(牙齿发育钙化期)服用了四环素类药物，导致了牙齿变色。
The patient had been in childhood (calcification period of tooth development) using the tetracycline class of drugs, resulting in discoloration of the teeth.
此患者曾在儿时(牙齿发育钙化期)服用了四环素类药物，导致了牙齿变色。
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