12821f0f_hat_DO_NOT_indicate_root_canal__Symptom
[0] 9. [Further information] This is galvanic pain. It is typically related to metal fillings in your mouth. If it becomes a consistent problem, see your dentist and you may consider having your filling changed to a non-metal filling. [Symptom] 
You have electric type pain -- sharp and shooting, similar to that of chewing on tin foil.
Symptoms that DO NOT indicate root canal
Symptom