Why do back teeth decay so easily?

为何后磨牙如此容易被侵蚀？

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To understand what happens when your teeth decay, it's helpful to know what's in your mouth naturally. Here are a few of the elements.

为了理解当你的牙齿龋坏时都发生了什么，了解你口腔的自然状况是有益的。以下是几个基本组成要素。

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Sugar can cause tooth decay by being used as a food source for the bacteria found on our teeth, which causes plaque.

糖通过被那些存在我们牙齿的引起斑块的细菌作为一种食物来源，可以导致牙齿腐烂。

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This acid attacks the enamel on the teeth and leaves them vulnerable to decay.

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The GAO found that one in three children had untreated tooth decay twice the rate of those covered by private insurance and one in nine had untreated decay in three or more teeth.

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The report says scientific evidence suggests "almost every proven method to prevent decay includes delivery of fluoride to teeth surfaces".

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