Which of the following statements about maxillofacial trauma is/are false?

B. The mandible is the most common site of facial fracture

DISCUSSION: Maxillofacial injuries generally do not cause life-threatening injuries, with the exception of those that occlude the airway. Therefore, the first priority in assessing and managing the patient with maxillofacial trauma is to assess and assure the adequacy of the airway. The face is typically divided into thirds when defining injuries. Injuries to the upper third of the face are often accompanied by ocular or central nervous system complications as well as facial deformities. Fractures of the orbital roof are frequently associated with frontal sinus and nasal ethmoid fractures, and are accompanied by a loss of upward gaze due to involvement of the superior rectus muscle. However, the most common cause of loss of upward gaze is orbital floor injury and associated entrapment of the globe or injury to the inferior rectus muscle. Middle third of facial structures include the maxilla, zygoma, orbits, and nose. The Le Fort classifications of facial fractures are commonly employed to describe these complex fracture lines. In a Le Fort II fracture, the superior fracture line is transverse through the nasal bones or through the articulation of the maxillary and nasal bones with the frontal bones. This is also known as the “pyramidal” fracture of the mid-face. The diagnosis is established by digital manipulation of the anterior maxilla and observation for mobility of the central triangle (the maxilla and nose). The lower third of the face contains a single facial bone, the mandible. After the nasal bones, the mandible is the second most commonly fractured facial bone.