ANATOMY OF MAXILLARY AND MANDIBULAR NERVE Maxillary nerve (V2; 2nd branch of the trigeminal nerve) Posterior superior alveolar (PSA) nerve Supplies all the roots of the third and second molar teeth and two roots of the first molar tooth Landmarks for block: the posterolateral portion of the maxillary tuberosity and the second molar Middle superior alveolar (MSA) nerve Supplies the maxillary first and second bicuspid teeth and the mesiobuccal root of the first molar Landmark for block: junction between the second premolar and first molar Anterior superior alveolar (ASA) nerve Supplies the maxillary central, lateral, and cuspid teeth; the labial mucous membrane; the periosteum; and the alveoli on one side of the median line Landmark for block: the apex of the canine tooth There is communication between the ASA, MSA, and PSA nerves. Mandibular nerve (V3; 3rd branch of the trigeminal nerve) Supplies the lower face and temporal region, including the lower jaw and lip Inferior alveolar nerve Descends under the external pterygoid muscle and passes between the ramus of the mandible and the sphenomandibular ligament to enter the mandibular canal, where it is accompanied by the inferior alveolar artery and vein The inferior alveolar nerve is blocked at the pterygomandibular triangle. Landmarks for this block: anterior border of the ramus of the mandible, the intraoral coronoid notch, and the occlusal plane of the molars

Branches of the maxillary nerve. Inferior alveolar and lingual nerves.