Dental filling anesthesia lead to crooked mouth is mainly anesthesia paralyzed the facial nerve or injected anesthesia damage to the facial nerve.
1. local anesthesia when extracting teeth, if the anesthesia site is deeper or the injection dose is too large, it will cause facial nerve paralysis; it will lead to temporary paralysis of the facial muscles, but to be absorbed and decomposed by the body of the anesthetic can be restored to normal, generally do not need special treatment.
2. If the syringe needle damages the facial nerve during anesthesia, it will also lead to facial muscle movement disorder and symptoms of facial paralysis; it is recommended to take nutritive nerve medication (e.g. vitamin B12, methylcobalamin, etc.) under the guidance of doctor to promote the recovery of facial nerve.