A blowout fracture affects which portion of the bony orbit?

• A. The roof of the orbit
• B. The lateral wall of the orbit
• C. The floor of the orbit
• D. The medial wall of the orbit

Answer: (C)

A blowout fracture specifically affects the floor of the orbit. This type of fracture usually occurs when a blunt force trauma, such as a punch or a fall, exerts pressure on the globe (eye) pushing it backward and downward. This force can lead to a fracture in the thin bones of the orbital floor, often resulting in herniation of orbital contents into the maxillary sinus.

Understanding this specific mechanism of injury is essential in radiology, as it guides clinicians in making accurate diagnoses based on physical examinations and imaging studies. The identification of blowout fractures is crucial because it can impact treatment strategies, including the management of potential ocular complications that may arise from such injuries.