The Orbital Surface Of The Maxilla

Description

Triangular and gently concave, the orbital surface of the maxilla forms the anterior two thirds of the orbital floor, positioned inferior to the globe and superior to the maxillary sinus cavity. Medially it approaches the lacrimal groove and the frontal process of the maxilla, while laterally it meets the zygomatic bone at the zygomaticomaxillary junction, establishing the inferolateral boundary of the orbit. Across the sequence, the animation tracks the infraorbital groove coursing anteriorly into the infraorbital canal and toward the infraorbital foramen on the facial surface. Small details matter. Clinically, this is the substrate for classic orbital blowout fractures, where a sudden rise in intraorbital pressure can fracture the thin maxillary orbital plate into the maxillary sinus and entrap the inferior rectus or inferior oblique muscles, producing diplopia and painful upgaze. Following the groove-to-canal progression clarifies the path of the infraorbital nerve and vessels, a frequent site of sensory deficit over the cheek, upper lip, and maxillary teeth after trauma or during surgical manipulation. The animated progression also helps learners link the orbital floor to the roof of the maxillary sinus, a relationship that drives both fracture patterns and surgical corridors. Use this animation in head and neck anatomy, dental anatomy, and oculoplastics teaching to anchor the concept of the orbital floor as a maxillary structure rather than an isolated orbital wall. It also fits well in radiology and trauma education when correlating orbital floor fractures on CT (coronal and sagittal reconstructions) with infraorbital canal involvement and the inferior orbital fissure region. Anatomical accuracy verified by SciePro's Medical Advisory Board.