牙齿变色

当模具根组织，将成为牙齿变色。

When the root tissue dies , the tooth will become discolored .

第三个问题：为什么人们的牙齿变色后衰老？

Third Question : Why do people 's teeth discolor upon aging ?

吸烟会使牙齿变色。

Smoking discolours the teeth .

人们还可通过电脑远程控制该装置，使得牙齿变色甚至不断闪烁。

People can even get a computer by which to control the contraption making the teeth change colors or even blink .

方法将42例门诊患者按牙齿变色原因分为四环素牙、氟斑牙、外在因素变色牙（年龄、咖啡、茶、香烟等）3组，进行Denlinx冷光牙齿美白术治疗。

Methods 42 cases of such patient in OPD were divided into 3 groups according to tetracycline teeth , fluorosis and pigment teeth and they were treated with luminescence .

受过重击的牙齿可能会变色。

A tooth which has been hit hard may discolour

但做完根管治疗的牙齿通常会慢慢变色，在前牙可能会影响美观，若病人在意的话，可做上金属瓷牙或全瓷冠。

But finished his teeth root canal therapy usually will gradually change color , front teeth may affect the appearance , if the patient care , can be done on metal ceramic tooth or all-ceramic crowns .

目的：漂白可以改善自然牙齿的美观，这个方法可以用于内源性和外源性牙齿变色。

Objective : The esthetics of the natural dentition can be improved by bleaching and this process can be applied to intrinsically and extrinsically stain teeth .