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Originally Posted by angelbabiez9700
for the poster that said their molar hurt, I would also tell my dentist because it could be a cavity...many times a cavity starts inside the tooth and starts to rot the tooth inside out before it is even seen.
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Cavities are caused due to contact with the enamel of your teeth and left over food particles. Bacteria that lives in your mouth, can combine with these left over particles and cause an acid that is able to break down the enamel and result in a cavity. Cavities begin on the outside of our teeth ... here's some articles that may help you understand this.
Howstuffworks "How Cavities and Fillings Work"
Cavities - Tooth Decay - How Cavities Form Video - About.com
Tooth Decay
Take care!