INBDE (Integrated National Board Dental Examination) Practice Exam

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What type of fracture is described as a horizontal fracture across maxilla?

LeFort II
LeFort I
LeFort III
Zygomaticomaxillary complex fracture

The correct answer is: LeFort I

A horizontal fracture across the maxilla is typically indicative of a LeFort I fracture. In a LeFort I fracture, the maxilla is separated from the rest of the facial bones, causing a horizontal separation near the level of the nasal floor. Option A, LeFort II fractures, typically involve separation of the central midface, including the nose, maxilla, and portions of the orbits. Option C, LeFort III fractures, are the most extensive and involve separation of the facial bones at the level of the cranial base, including the zygomatic arches and orbits. The zygomaticomaxillary complex fracture (Option D) involves the zygomatic bone and the maxilla rather than a horizontal fracture across the maxilla itself.