To better understand the problem, let’s take a look at the anatomy of a tooth. Right in the middle of the tooth is the pulp (in pink) where the nerve of the tooth is located. The pulp plays vital role in early age when the teeth are developing. In mature teeth, the pulp is simply a signal system to alert where there is something wrong. Being so important, the nerve is protected by two layers. The outside layer, called enamel is the strongest structure in the human body and acts as a shield for the tooth crown. It is very condensed and free of any sensation. That’s why cavities in very early stage are painless. The inside layer, dentin is built from small tubules, microscopic channels that travel from the pulp to the enamel border. This tubules are housing the nerve endings.
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