Inferior Orbital Floor Fracture Radiology

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.

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. Approximately 50 will be associated with medial orbital wall fracture. A portion of the inferior rectus muscle solid red arrow projects into the maxillary sinus below see normal opposite side broken red arrow. A blowout fracture of the orbital floor is defined as a fracture of the orbital floor in which the inferior orbital rim is intact.

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. Orbital fat prolapses into the maxillary sinus and may be joined by prolapse of the inferior rectus muscle. The infraorbital canal is a site of weakness. Inferior blowout fractures are the most common.

Inferior floor medial wall lamina papyracea superior roof lateral wall. Blowout fractures can occur through one or more of the orbital walls. Bilateral frontal intraparenchymal hemorrhages. These type of fractures usually result from a direct blow to the orbit.

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. Hemorrhage partially fills the left maxillary sinus. Fractures of the orbital floor are common.

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

Computed tomography scan demonstrating a fracture of the orbital floor involving both inferior and medial walls resulting in a depressed fragment.