Keywords: Local anesthesia, nose, maxíllary sinos

Abstract: The Authors show the pterygo maxilar fossa and nasociliar nerve (in their anatomical and physiological aspects), of which anesthetic infiltrations are easy, quick, efficacious and safe in many odontologic and otolaryngologic procedures, making possible the execution of nose and sinus surgeries with decreased bleeding and minus general anesthetic drugs, because of algic stimulus disappearance and consequent no catecolamines libetation.