Is there any reason why the health care agents will inject any liquid into the incisive foramen for #1 wisdom tooth extraction?

Ask the practioner: Local anesthesia may be injected into the incisive foramen to numb the upper front teeth and palate in that area, along with infiltration on the facial aspect. Personally, i see no reason why someone would do that for the removal of a wisdom tooth. If that was done, and you want to know why, i suggest that you ask the dentist.