Transparent Nerves of the Upper Teeth, Gross Anatomy

Description

Rendered as a translucent maxilla and midface, the upper dentition is shown seated in the alveolar process with individual roots visible for incisors, canine, premolars, and molars. Fine neural branches track from the posterior maxilla toward the posterior teeth, consistent with the posterior superior alveolar nerve coursing from the maxillary nerve (V2) in the pterygopalatine region to the molar pulps and adjacent buccal gingiva. Superior to the dental arcade, the floor of the maxillary sinus and the lateral wall of the nasal cavity sit in close anatomic continuity with the apices of the posterior teeth. Orientation emphasizes superior to inferior relationships from orbit and sinus to the alveolar ridge. Clinical relevance centers on regional anesthesia and iatrogenic nerve injury. The posterior superior alveolar nerve is a target during posterior superior alveolar (PSA) blocks, and its proximity to the pterygoid venous plexus helps explain hematoma risk when the injection is placed too posteriorly or deeply. Root apices of maxillary molars can project near the maxillary sinus floor, a relationship that matters in odontogenic sinusitis and during extractions, apicoectomy, or implant planning where altered sensation or referred pain can reflect V2 branch involvement. Small branches, big consequences. Dental anatomy and neuroanatomy instructors can use this for teaching V2 distribution, the difference between pulpal and gingival innervation, and why maxillary molar pain may mimic sinus disease. It also suits oral and maxillofacial surgery texts, anesthesia training modules, and patient-facing education on numbness patterns after injections or procedures. Anatomical accuracy verified by SciePro's Medical Advisory Board.