Inferior Orbital Floor Fracture Radiology

Orbital fat prolapses into the maxillary sinus and may be joined by prolapse of the inferior rectus muscle.

Inferior orbital floor fracture radiology.

The inferior orbital fissure iof lies in the floor of the orbit inferior to the superior orbital fissure and it is bounded superiorly by the greater wing of sphenoid inferiorly by maxilla and orbital process of palatine bone and laterally by the zygomatic bone it opens into posterolateral aspect of orbital floor. Inferior blowout fractures are the most common. Approximately 50 will be associated with medial orbital wall fracture. Orbital fractures are common occurring in 10 25 of all cases of facial fracture 1 common mechanisms include blunt trauma mainly from assault and motor vehicle accident.

Hemorrhage partially fills the left maxillary sinus. This computed tomography image shows encroachment on lateral rectus muscle secondary to the lateral wall fracture. The inferior orbital wall is most commonly affected by fracture 2 signs of orbital fracture typically include peri ortbital bruising and subconjunctival hemorrhage. Reformatted coronal ct of the facial bones demonstrates a fracture of the floor of the left orbit white arrow associated with orbital emphysema blue arrow.

Fractures of the orbital floor are common. Computed tomography scan demonstrating a fracture of the orbital floor involving both inferior and medial walls resulting in a depressed fragment. Inferior floor medial wall lamina papyracea superior roof lateral wall. These type of fractures usually result from a direct blow to the orbit.

Left orbital floor fracture. The infraorbital canal is a site of weakness. It is estimated that about 10 of all facial fractures are isolated orbital wall fractures the majority of these being the orbital floor and that 30 40 of. Fractures of the medial and lateral orbital walls.

It joins medially with the pterygomaxillary fissure at a right angle. A blowout fracture of the orbital floor is defined as a fracture of the orbital floor in which the inferior orbital rim is intact. Blowout fractures can occur through one or more of the orbital walls. No evidence of rectus muscle entrapment retrobulbar hemorrhage or proptosis.

Bilateral frontal intraparenchymal hemorrhages.