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.

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. Hemorrhage partially fills the left maxillary sinus. Blowout fracture of the orbit. 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. No evidence of rectus muscle entrapment retrobulbar hemorrhage or proptosis. 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. The infraorbital canal is a site of weakness.

Bilateral frontal intraparenchymal hemorrhages. Left orbital floor fracture. Blowout fractures can occur through one or more of the orbital walls. A portion of the inferior rectus muscle solid red arrow projects into the maxillary sinus below see normal opposite side broken red arrow.

Approximately 50 will be associated with medial orbital wall fracture. Inferior floor medial wall lamina papyracea superior roof lateral wall. This computed tomography image shows encroachment on lateral rectus muscle secondary to the lateral wall fracture. Fractures of the orbital floor are common.

Fractures of the medial and lateral orbital walls. 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. Left orbital floor fracture is depressed by 3 5 millimeters.

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