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Could not tell which tooth toothache will be the case?

　　According to internationally renowned expert Professor Cui Rongshuo oral introduction, the reason why the human body can feel toothache, mainly due to tooth pulp in the transmission through the trigeminal nerve to tell the brain. However, disposable pulp from the trigeminal nerve, the nerve pain receptors only in the pulp inside the body without receptors, that only experience pain without positioning function, and then showed the ipsilateral pain, it is difficult to determine which a tooth, which is common toothache could not tell which tooth will be the case.

原文翻譯如下：