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了解一下智齿 (1)
Wising Up About Wisdom Teeth(1/2)
听于:09-02-06    用时:29:52
正确率:84% (+17分)    错词:21个

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听写稿:
Wisdom teeth are normally the last teeth to appear in the mouth, it . It usually happens when people are older and wiserthat . That is, when they are in their late teenage years or eraly early twenties. Wisdom teeth are molars, or chewing teeth at the back of the mouth, the third said . The 3rd set of molars, if you have them, are your wisdom teeth.

They can growing to grow into place normally and never cause a problembut . But often there is not enough room for them in the mouth, they . They might crowd the other teeth. Sometimes they even push to through the gums sidewaysand impactive with some .

An impacted wisdom tooth is one can 1 that fails to completely rise through the gums -- the term is errupterupt. Wisdom teeth that only partly erupt can leaves leave space for bacterier bacteria to enter around the tooth. Effection Infection is a risk in these cases.

Experts say people should have their mouth eximined mouths examined between the ages of 16 and 20 for placement of their wisdom teeth. X-rays can show wisdom teeth below the gumsthose . Those that are not wild land well aligned and become impacted are often removed.

The American dential instiation Dental Association says removal is generally advised when wisdom teeth only partly break through the gums.


听写笔记:
molar 臼齿,磨牙
gum 牙龈,口香糖
impacted 压紧的;结实的
bacteria 细菌
infection 传染
aligne 排列,使结盟
Dental Association 牙齿协会
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