Inferior Orbital Floor Fracture Radiology

Approximately 50 will be associated with medial orbital wall fracture.

Inferior orbital floor fracture radiology.

Left orbital floor fracture is depressed by 3 5 millimeters. 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. No evidence of rectus muscle entrapment retrobulbar hemorrhage or proptosis.

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. It joins medially with the pterygomaxillary fissure at a right angle. 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.

Orbital fat prolapses into the maxillary sinus and may be joined by prolapse of the inferior rectus muscle. Fractures of the orbital floor are common. Blowout fractures can occur through one or more of the orbital walls. Computed tomography scan demonstrating a fracture of the orbital floor involving both inferior and medial walls resulting in a depressed fragment.

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. This computed tomography image shows encroachment on lateral rectus muscle secondary to the lateral wall fracture. Fractures of the medial and lateral orbital walls. 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 portion of the inferior rectus muscle solid red arrow projects into the maxillary sinus below see normal opposite side broken red arrow. These type of fractures usually result from a direct blow to the orbit. Inferior floor medial wall lamina papyracea superior roof lateral wall.

Hemorrhage partially fills the left maxillary sinus.