With gold teeth, if aluminum teeth are filled, will primary batteries form in the mouth?

There is a situation similar to that of the old lady, which is called "galvanic effect" in dentistry. Because of the instability and toxicity of aluminum, aluminum metal material is not used for filling teeth, and the "aluminum" in the joke may be amalgam material. If your mandible is filled with amalgam, there is a metal crown (not made of amalgam, such as gold) at the position where that tooth is opposite to the mandible, and two dental materials contact each time. Because the human body is a conductor and there are a small amount of ions in saliva, the "galvanic effect" will occur when biting, which is similar to the effect of primary batteries. Such patients usually tell doctors that they have a sudden electric shock-like tingling when talking or eating. Of course, the current generated by electrorheological effect is not very strong in theory, but it is enough to cause discomfort for sensitive teeth, especially when these two teeth have pulp vitality. Toothache is radioactive and will radiate to adjacent teeth, opposite teeth, face and head. Therefore, it is understandable that the old lady has a toothache because of the "galvanic effect", which leads to "dizziness".

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