Inferior Orbital Floor Fracture Radiology

Blowout fracture of the orbit.

Inferior orbital floor fracture radiology.

Fractures of the orbital floor are common. 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. 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. This computed tomography image shows encroachment on lateral rectus muscle secondary to the lateral wall fracture.

It joins medially with the pterygomaxillary fissure at a right angle. Left orbital floor fracture is depressed by 3 5 millimeters. Blowout fractures can occur through one or more of the orbital walls. These type of fractures usually result from a direct blow to the orbit.

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. The infraorbital canal is a site of weakness. A blowout fracture of the orbital floor is defined as a fracture of the orbital floor in which the inferior orbital rim is intact. Inferior blowout fractures are the most common.

Inferior floor medial wall lamina papyracea superior roof lateral wall. 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. Orbital fat prolapses into the maxillary sinus and may be joined by prolapse of the inferior rectus muscle.

Hemorrhage partially fills the left maxillary sinus. The inferior orbital wall is most commonly affected by fracture 2 signs of orbital fracture typically include peri ortbital bruising and subconjunctival hemorrhage. Bilateral frontal intraparenchymal hemorrhages. Computed tomography scan demonstrating a fracture of the orbital floor involving both inferior and medial walls resulting in a depressed fragment.

Left orbital floor fracture.