Sinuses Viewed in a Frontal Section of the Skull

Description

Centered in the frontal section, the nasal cavity appears as a midline airway separated by the nasal septum, with the lateral nasal walls forming the boundaries of the meatuses where mucosa lines the passage. Laterally and inferior to the orbits, the paired maxillary sinuses occupy the bodies of the maxillae, flanking the nasal cavity and extending toward the alveolar processes above the maxillary dentition. Superior to the nasal cavity, the frontal bone and its internal architecture frame the expected location of the frontal sinuses, while the cranial vault and facial skeleton show their bony thickness changes across the cut surface. Sutural lines of the calvaria remain visible peripherally as landmarks of the skull’s assembly. A frontal (coronal) section is the workhorse view for teaching paranasal sinus relationships because it clarifies the proximity of the maxillary sinus floor to the roots of the maxillary premolars and molars and the position of the sinonasal mucosa relative to the ostiomeatal region. Odontogenic maxillary sinusitis, oroantral fistula after extraction, and iatrogenic sinus floor violation during implant placement all make more anatomical sense when you can see the inferior extension of the sinus and its lateral position to the nasal cavity. Short and direct. Use this artwork in gross anatomy and head and neck modules to anchor discussions of sinus drainage pathways, mucosal disease patterns, and surgical corridors, and in radiology teaching files when orienting learners to coronal CT of the paranasal sinuses. It also fits otolaryngology and dental publications covering functional endoscopic sinus surgery planning, Caldwell-Luc history, or dental sinus communications. Anatomical accuracy verified by SciePro's Medical Advisory Board.